WO2021109123A1

WO2021109123A1 - Probe module and modular lithium battery testing device

Info

Publication number: WO2021109123A1
Application number: PCT/CN2019/123660
Authority: WO
Inventors: 王洪; 王守模; 周俊辉; 赵少华
Original assignee: 广东恒翼能科技有限公司
Priority date: 2019-12-06
Filing date: 2019-12-06
Publication date: 2021-06-10

Abstract

Disclosed in the present application are a probe module and a modular lithium battery testing device. The probe module comprises a probe mounting rack, and a plurality of probe assemblies mounted on the probe mounting rack at adjustable intervals. Each probe assembly comprises: a probe fixing seat which is slidably mounted on the probe mounting rack and provided with an axially opened through hole; and a probe, which is movably mounted inside the through hole and has an extending state in which the probe extends outwards relative to the probe fixing seat to contact a battery pack to be tested and a retracting state in which the probe retracts inwards relative to the probe fixing seat to be separated from the battery pack to be tested. The probe module can be switched into different types of probe modules, can test different types of lithium battery packs under the condition that the types of the probe modules do not need to be replaced, and solves the problem that the types of the probe modules are inconvenient to replace.

Description

Probe module and modularized lithium battery testing device

Technical field

This application relates to the technical field of lithium battery testing, in particular to a probe module and a modularized lithium battery testing device.

Background technique

Nowadays, with the development of microelectronics technology, the number of miniaturized devices is increasing, which puts forward high requirements on the power supply. Lithium batteries are exquisite, convenient and have charging and discharging functions, so they have entered a large-scale practical stage. The test equipment for lithium batteries is an indispensable part of battery production.

The upper assembly structure of a modularized lithium battery testing equipment as shown in Figure 1 and Figure 2, including a frame 100', a negative pressure cup module 300' and a probe module 200' mounted on the frame 100' , The negative pressure cup module 300' includes eight groups of negative pressure cups, and each negative pressure cup corresponds to a separate lithium battery; the probe module 200' includes a probe fixing plate 210' and is mounted on the probe fixing plate 210' The probe assembly 220' that detects eight groups of single-stage lithium batteries respectively; the probe assembly 220' is connected with a probe mounting seat 230', and the probe mounting seat 230' is fixed on the probe fixing plate 210' by screws .

In practical applications, there are many different types of lithium battery packs including 8 groups of lithium batteries, 12 groups of lithium batteries and 16 groups of lithium batteries, and the distance between adjacent lithium batteries in different types of lithium battery packs is also different. The probe components in the probe module are all fixed on the probe fixing plate by screws, and the position of the probe assembly on the probe fixing plate is not adjustable; currently, the test for different types of lithium battery packs needs to be replaced Different types of probe modules have the problem of inconvenient replacement of probe modules.

Summary of the invention

Therefore, the technical problem to be solved by the present application is to overcome the problem in the prior art that different numbers or pitches of lithium battery packs need to be tested with different types of probe modules, so as to provide a convenient type to adapt to different types of lithium batteries. Probe modules and modularized lithium battery test devices for battery module testing needs.

In order to solve the above technical problems, the technical solution of this application is as follows:

A probe module includes a probe mounting frame and a plurality of probe assemblies mounted on the probe mounting frame with adjustable spacing, and the probe assembly includes:

The probe fixing seat is slidably mounted on the probe mounting frame and has a through hole opened in the axial direction;

The probe, movably installed in the through hole, has an extended state that extends outward relative to the probe holder and can contact the battery pack to be tested, and retracts inward relative to the probe holder and is in contact with the battery pack to be tested. Test the retracted state of the battery pack separation.

Further, a sliding groove structure is provided on the probe mounting frame, and the probe fixing seat is slidably mounted on the sliding groove structure.

Further, the probe is a current probe.

Further, the inner peripheral wall of the probe holder is provided with a first clamping position and a second clamping position sequentially arranged along the axial direction of the through hole; the current probe includes:

Current probe needle body;

The current probe sleeve is fixedly sleeved on the outer circumference of the current probe needle body, and is provided with a current probe sleeve that can be buckled with the first locking position on the probe holder to make the current probe needle The body is in the extended state or is buckled with the second locking position so that the current probe needle body is in the retracted state;

The first elastic member is sleeved on the outer circumference of the current probe sleeve and one end is connected to the top of the probe fixing seat. Its elastic force drives the current probe sleeve to overcome its own gravity and makes the buckle body Buckle in the first card position or the second card position.

Further, the sliding groove structure is a through groove provided on the probe mounting frame and penetrating through the bottom of the groove, and the probe assembly further includes sleeved on the outer circumference of the current probe sleeve and connected to the probe. The needle mounting frame is located on the fixed top plate against which the top walls on opposite sides of the through groove abut, and one end of the probe holder opposite to the fixed top plate is provided with the probe mounting frame on opposite sides of the through groove. A fixed bottom plate against which the bottom wall abuts, the fixed bottom plate is provided with positioning pins, and the bottom wall of the probe mounting frame is provided with a plurality of positioning holes corresponding to the positioning pins.

Further, a hook-shaped body is connected to the fixed bottom plate to facilitate holding the probe fixing seat so as to pull the positioning pin out of the positioning hole.

Further, the probe is a temperature probe.

Further, a card slot is provided on the inner wall of the probe holder, and the temperature probe includes:

A temperature probe mounting seat, which is fixedly connected to the probe holder and one end protrudes from the through hole on the probe holder;

The temperature probe needle body is movably connected to the temperature probe mounting seat along its axial direction, and one end is provided with a lower limit that can be inserted into the card slot so that the temperature probe needle body is in the retracted state The other end of the block is provided with an upper limit block that can resist the temperature probe mounting seat so that the temperature probe needle body is in the extended state;

The second elastic member is sleeved on the outer circumference of the temperature probe needle body. When the lower limit block of the temperature probe needle body comes out of the groove of the probe holder, its elasticity The force drives the temperature probe needle body to move from the retracted state to the extended state.

Further, the sliding groove structure is a T-shaped sliding groove provided on the side wall of the probe mounting frame, and a T-shaped card slidably mounted on the T-shaped sliding groove is connected to the probe fixing seat. Piece.

On the other hand, an embodiment of the present application also proposes a modularized lithium battery testing device, including the probe module as described above.

The technical solution of this application has the following advantages:

1. In the probe module provided by this application, the needle body of the probe assembly has two forms: an extended state and a retracted state relative to the probe holder, and the positions of several groups of probe assemblies on the probe holder can be When testing different types of lithium battery packs, you only need to move several probe assemblies on the probe mounting frame, and make the probe assemblies with the number of single cells on the lithium battery pack to be tested extend out. In the state, the rest of the probe assembly is in the retracted state, and different types of lithium battery packs can be tested without changing the type of probe module, which solves the problem of inconvenient replacement of the probe module.

2. For the probe module provided in this application, the probe holder realizes the positioning of the probe assembly by fixing the positioning pins on the bottom plate and the positioning holes on the probe mounting frame. When the position of the probe assembly needs to be moved, only It is necessary to pull down the fixed bottom plate of the probe holder to make the positioning pin come out from the positioning hole, and at the same time the first elastic member is compressed; then slide the probe holder to the desired position along the chute structure, and loosen the fixed bottom plate, The probe holder moves upward under the elastic restoring force of the first elastic member, so that the positioning pin on the fixed bottom plate extends into another positioning hole of the probe holder, thereby realizing the positioning of the probe holder and the probe assembly , Improve the stability of the probe assembly.

Description of the drawings

In order to more clearly illustrate the specific embodiments of this application or the technical solutions in the prior art, the following will briefly introduce the drawings that need to be used in the specific embodiments or the description of the prior art. Obviously, the appendix in the following description The drawings are some embodiments of the present application. For those of ordinary skill in the art, without creative work, other drawings can be obtained based on these drawings.

FIG. 1 is a schematic diagram of the overall structure of the upper assembly structure in the lithium battery formation and capacity separation equipment in the prior art;

2 is a schematic diagram of the overall structure of the probe module in the prior art;

Figure 3 is a front view of a 16-channel probe module in an embodiment of the application;

4 is a front view of the 16-channel probe module converted to the 12-channel probe module in the embodiment of the application;

FIG. 5 is a front view of the 16-channel probe module converted to the 8-channel probe module in the embodiment of the application;

FIG. 6 is a schematic diagram of the overall structure after the 16-channel probe module is transformed into the 12-channel probe module in the embodiment of the application;

Fig. 7 is an enlarged view of A in Fig. 6;

8 is a front view of the current probe assembly in an extended state in an embodiment of the application;

9 is a cross-sectional view of the current probe assembly in an extended state in an embodiment of the application;

10 is a front view of the current probe assembly in the retracted state in the embodiment of the application;

11 is a cross-sectional view of the current probe assembly in the retracted state in the embodiment of the application;

Figure 12 is an enlarged view of B in Figure 6;

Figure 13 is a front view of the temperature probe assembly in an extended state in an embodiment of the application;

Figure 14 is a cross-sectional view of Figure 13 along the C-C plane;

15 is a schematic diagram of the overall structure of the temperature probe assembly in the retracted state in the embodiment of the application

Figure 16 is a front view of the temperature probe assembly in the retracted state in the embodiment of the application;

Figure 17 is a cross-sectional view of Figure 16 along the D-D plane;

Fig. 18 is a cross-sectional view of Fig. 17 along the E-E plane.

Description of reference signs:

100', frame; 200', probe module; 210', probe fixing plate; 220', probe assembly; 230', probe mounting seat; 300', negative pressure cup module;

10. Current probe mounting frame; 110. Through slot;

20. Current probe assembly; 210, current probe fixing seat; 211, first card position; 212, second card position; 213, fixed bottom plate; 214, positioning pin; 215, hook body; 220, current probe Needle body; 230, current probe sleeve; 231, buckle body; 240, first elastic member; 250, fixed top plate;

30. Temperature probe mounting frame; 310, T-shaped chute;

40. Temperature probe assembly; 410, temperature probe fixing seat; 411, T-shaped block; 412, card slot; 420, temperature probe mounting seat; 430, temperature probe needle body; 431, lower limit block; 432 , Upper limit block; 440, second elastic member; 450, soft rubber sleeve; 460, temperature probe needle.

Detailed ways

The technical solutions of the present application will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

In the description of this application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the application and simplifying the description, and does not indicate or imply that the pointed device or element must have a specific orientation or a specific orientation. The structure and operation cannot therefore be understood as a limitation of this application. In addition, the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.

In the description of this application, it should be noted that the terms "installation", "connection", and "connection" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, it can be a fixed connection or a detachable connection. Connected or integrally connected; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood under specific circumstances.

In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

A probe module as shown in Figures 3-6 includes a probe mounting frame and a number of probe assemblies mounted on the probe mounting frame with adjustable spacing. Since there are three types of common lithium battery packs including eight groups of lithium batteries, twelve groups of lithium batteries, and sixteen groups of lithium batteries, in this embodiment, the probe assembly is specifically provided with sixteen groups to facilitate the comparison of the above three types. Type of lithium battery pack to be tested. It should be understood here that the number of probe assemblies can be selected according to the suitability required.

In this embodiment, the probe assembly may be a current probe assembly 20 or a temperature probe assembly 40. It should be understood here that any detection device that measures a certain performance of a lithium battery pack through contact with a lithium battery is within the protection scope of this application, such as the negative pressure of the lithium battery leakage detection through contact with the lithium battery The suction cup can also be understood as the probe assembly in this application.

In this embodiment, the probe mounting frame for mounting the current probe assembly 20 is the current probe mounting frame 10, and the current probe mounting frame 10 is provided with a through groove 110 through the bottom of the groove. The current probe assembly 20 includes a current probe fixing seat 210 and a current probe. The current probe fixing seat 210 is slidably mounted on the through slot 110 of the current probe mounting frame 10 and has an axially opened through hole; the current probe is movable Installed in the through hole, it has an extended state where the relative current probe holder 210 extends outwards to be in contact with the battery pack to be tested, and a retractable state where the relative current probe holder 210 retracts inward and separates from the battery pack to be tested. Back to the state.

As shown in FIGS. 3-5, a probe module with sixteen sets of current probe assemblies 20 is taken as an example to introduce the rapid changeover process of the probe module. When the above probe module needs to test the lithium battery pack containing twelve sets of lithium batteries, keep the twelve sets of current probe assemblies 20 in the extended state, and the other four sets of current probe assemblies 20 in the retracted state, and at the same time Adjust the spacing between the sixteen sets of current probe assemblies 20, so that the twelve sets of current probe assemblies 20 in the extended state correspond to the twelve sets of lithium batteries on the lithium battery pack; in the same way, when the above probes When the module needs to test the lithium battery pack containing eight sets of lithium batteries, keep the eight sets of current probe assemblies 20 in the extended state, and the other eight sets of current probe assemblies 20 in the retracted state, and adjust the sixteen sets of current probe assemblies at the same time. The spacing between the needle assemblies 20 makes the eight sets of current probe assemblies 20 in the extended state correspond one-to-one with the eight sets of lithium batteries on the lithium battery pack. This kind of probe module does not need to change the model when testing different types of lithium battery packs, which solves the problem of inconvenience in changing the probe module and improves work efficiency.

In this embodiment, the inner peripheral wall of the current probe holder 210 is provided with a first clamping position 211 and a second clamping position 212 that are sequentially arranged along the axial direction of the through hole. Preferably, the first clamping position 211 and the second clamping position 212 are oppositely arranged on the inner peripheral wall of the current probe fixing seat 210. The current probe includes at least a current probe needle body 220, a current probe sleeve 230, and a first elastic member 240; wherein, the current probe sleeve 230 is fixedly sleeved on the outer circumference of the current probe needle body 220, and the upper end of the current probe sleeve 230 The upper end of the probe holder 210 passes through, and the two ends of the current probe needle body 220 respectively pass through the upper and lower ends of the current probe sleeve 230; the outer peripheral wall of the current probe sleeve 230 is fixed with the current probe The first locking position 211 on the seat 210 is buckled to make the current probe needle body 220 in an extended state or is buckled with the second locking position 212 on the current probe fixing seat 210 to make the current probe needle body 220 The buckle body 231 in a retracted state. The first elastic member 240 is sleeved on the outer circumference of the current probe sleeve 230, and one end is connected to the top of the current probe holder 210, and the other end is connected to the extension of the top of the current probe sleeve 230. The elastic force drives the current probe. The needle cannula 230 overcomes its own gravity and buckles the buckle body 231 to the first locking position 211 or the second locking position 212. Yes, the buckle body 231 is a convex ring located at the lower end of the current probe sleeve 230 and protruding from the outer side wall of the current probe sleeve 230, and the first elastic member 240 is a spring.

The process of adjusting the current probe from the extended state to the retracted state is as follows: rotate the current probe needle body 220 along the axis of the current probe needle body 220 by 180 degrees, so that the buckle body 231 on the current probe sleeve 230 is removed from The position buckled with the first clamping position 211 is adjusted to the position corresponding to the second clamping position 212, the current probe needle body 220 is released, and the current probe needle body 220 and the current probe sleeve 230 are in the first elastic position. The member 240 moves upward under the action of the elastic restoring force, until the buckle body 231 on the current probe sleeve 230 is buckled with the second locking position 212 on the inner wall of the current probe holder 210, and the current probe needle body 220 is in the first position. The elastic force of the elastic member 240 and the restriction of the second locking position 212 on the buckle body 231 maintain the retracted state. The process of adjusting the current probe from the retracted state to the extended state is opposite to the above process. The specific process is as follows: pull down the current probe needle body 220 so that the button body 231 at the lower end of the current probe sleeve 230 is removed from the current probe fixing seat The lower end edge of the upper through hole 210 is penetrated, and the current probe needle body 220 is rotated 180 degrees along the axis of the current probe needle body 220, so that the buckle body 231 on the current probe sleeve 230 is separated from the second clamping position 212 The interlocking position is adjusted to the position corresponding to the first locking position 211, the current probe needle body 220 is released, and the elastic restoring force of the current probe needle body 220 and the current probe sleeve 230 on the first elastic member 240 Move upward under the action until the buckle body 231 on the current probe sleeve 230 is buckled with the first locking position 211 on the inner wall of the current probe fixing seat 210, and the current probe needle body 220 is under the elastic force of the first elastic member 240. And the first locking position 211 maintains the extended state under the restriction of the buckle body 231; it can realize the arbitrary conversion between the extended state and the retracted state of the current probe, and has the advantages of simple structure and convenient operation.

In this embodiment, the current probe assembly 20 further includes a fixed top plate 250 sleeved on the outer circumference of the current probe sleeve 230 and opposed to the top walls of the current probe mounting frame 10 on opposite sides of the through slot 110; One end of the needle holder 210 opposite to the fixed top plate 250 is provided with a fixed bottom plate 213 that abuts against the bottom walls of the current probe mounting frame 10 on opposite sides of the through slot 110. The fixed bottom plate 213 is provided with positioning pins 214, and a number of positioning holes (not shown in the figure) corresponding to the positioning pins 214 are opened on the bottom wall of the current probe mounting frame 10. Specifically, the number and positions of the positioning holes are determined according to the number of current probe assemblies 20 in the probe module and the positions of each current probe assembly 20 after the probe module is remodeled. The current probe holder 210 fixes the positioning pins 214 on the bottom plate 213 and the positioning holes on the current probe mounting frame 10 to realize the positioning of the current probe assembly 20. When the position of the current probe assembly 20 needs to be moved, only Pull the fixed bottom plate 213 of the current probe holder 210 downwards, so that the positioning pin 214 comes out of the positioning hole, and at the same time the first elastic member 240 is compressed; then slide the current probe holder 210 in the direction of the through slot 110 to the position If you need a position, loosen the fixed bottom plate 213, and the current probe holder 210 moves upward under the elastic restoring force of the first elastic member 240, so that the positioning pin 214 on the fixed bottom plate 213 extends into the other part of the current probe holder 210. In the positioning hole, the positioning of the current probe fixing seat 210 and the current probe assembly 20 is realized, and the stability of the current probe assembly 20 is improved.

Preferably, the two opposite sides of the fixed base plate 213 are connected with hook-shaped bodies 215 for holding the current probe fixing seat 210 so as to pull the positioning pin 214 out of the positioning hole.

In this embodiment, the probe mounting frame for mounting the temperature probe assembly 40 is a temperature probe mounting frame 30, and the temperature probe mounting frame 30 is connected to one side of the current probe mounting frame 10. A T-shaped sliding groove 310 is provided on the side wall of the temperature probe mounting frame 30, and the temperature probe assembly 40 is slidably installed on the T-shaped sliding groove 310. Specifically, the temperature probe assembly 40 includes a temperature probe fixing seat 410 and a temperature probe. The temperature probe fixing seat 410 is slidably mounted on the T-shaped chute 310 of the temperature probe mounting frame 30 and has an axial opening. Hole; The temperature probe is movably installed in the through hole, with the relative temperature probe holder 410 extending outwards to be in contact with the battery pack to be tested, and the relative temperature probe holder 410 retracts inward and with the battery to be tested. Test the retracted state of the battery pack separation. The remodeling process of the probe module with sixteen sets of temperature probe assemblies 40 is the same as the process of remodeling the probe module with sixteen sets of current probe assemblies 20, and will not be repeated here.

In this embodiment, the temperature probe holder 410 is connected with a T-shaped block 411 that can be slidably mounted on the T-shaped chute 310. The shape of the T-shaped block 411 matches the shape of the T-shaped chute 310 and is embedded In the T-shaped chute 310, both ends of the T-shaped block 411 are respectively provided with first mounting holes, and the bottom of the T-shaped chute 310 is provided with a number of second mounting holes corresponding to the first mounting holes (not shown in the figure) Out), the first mounting hole and the second mounting hole corresponding to each other are connected by a locking screw (not shown in the figure) to fix the temperature probe fixing seat 410 on the temperature probe mounting frame 30. Specifically, the number and position of the second mounting holes are determined according to the number of temperature probe assemblies 40 in the probe module and the position of each temperature probe assembly 40 after the probe module is remodeled. The temperature probe fixing seat 410 is connected to the temperature probe mounting frame 30 through the locking screws passing through the first mounting hole and the second mounting hole. When the position of the temperature probe assembly 40 needs to be moved, it only needs to be disassembled first Tighten the screw, move the temperature probe fixing seat 410 to a desired position, and then lock it with the locking screw. This structure for realizing the installation and positioning of the temperature probe assembly 40 has the advantages of simple structure and high adjustability.

In this embodiment, the inner wall of the temperature probe fixing seat 410 is provided with a clamping groove 412, and the temperature probe includes a temperature probe mounting seat 420, a temperature probe needle body 430 and a second elastic member 440. Wherein, the temperature probe mounting seat 420 is fixedly connected to the through hole of the temperature probe mounting seat 410, and the upper end extends from the through hole. The temperature probe needle body 430 is movably connected in the middle hole of the temperature probe mounting seat 420 along its axial direction, and the two ends respectively protrude from the two end openings of the middle hole on the temperature probe mounting seat 420, the temperature probe needle A temperature probe needle 460 is connected to the bottom end of the body 430. A lower limit block 431 protruding outward is integrally formed on the outer peripheral wall of the temperature probe needle body 430 close to the temperature probe needle 460, and the temperature probe needle body 430 The outer peripheral wall at the other end of the slab is integrally formed with an upper limit block 432 protruding outward. The lower limit block 431 has a first position that is embedded in the card slot 412 so that the temperature probe needle body 430 is in a retracted state and a second position that is separated from the card slot 412 from the buckle; the upper limit block 432 can be connected to the temperature probe mounting seat The top of the 420 abuts so that the temperature probe needle 430 is in an extended state. The second elastic member 440 is sleeved on the outer circumference of the temperature probe needle body 430. When the lower limit block 431 of the temperature probe needle body 430 comes out of the groove 412 of the probe holder, its elastic force drives the temperature probe needle The body 430 moves from the retracted state to the extended state. Specifically, the second elastic member 440 is also a spring.

The process of adjusting the temperature probe from the retracted state to the extended state is as follows: rotate the temperature probe needle body 430 180 degrees along the axis of the temperature probe needle body 430 to make the lower limit block 431 on the temperature probe needle body 430 Disengage from the buckling position of the groove 412 on the temperature probe fixing seat 410, and then the temperature probe needle body 430 moves downward under the action of the second elastic member 440 until the upper limit block 432 at the upper end of the temperature probe needle body 430 Against the top of the temperature probe mounting seat 420, the temperature probe needle body 430 maintains the extended state under the elastic force of the second elastic member 440 and the limit of the temperature probe mounting seat 420 to the upper limit block 432; The process of adjusting the probe from the extended state to the retracted state is opposite to the above process, and will not be repeated here. The temperature probe with this structure can be arbitrarily switched between the extended state and the retracted state, and has the advantages of simple structure and convenient operation.

As shown in FIG. 18, specifically, the lower limit block 431 is three convex ribs provided on the outer peripheral wall of the temperature probe needle 460 at even intervals in the circumferential direction.

Preferably, the temperature probe needle body 430 is sleeved with a soft rubber sleeve 450 opposite to the end of the temperature probe needle 460.

On the other hand, an embodiment of the present application also proposes a modularized lithium battery testing device, including a current probe mounting frame 10, a temperature probe mounting frame 30, and a device mounted on the current probe mounting frame 10 using the above-mentioned embodiment The current probe assembly 20 and the temperature probe assembly 40 installed on the temperature probe mounting frame 30 adopt the above-mentioned embodiment.

To sum up, in the probe module and modularized lithium battery testing device provided by the embodiments of the present application, the needle body of the probe assembly has two forms: an extended state and a retracted state relative to the probe holder, and several The position of the probe assembly on the probe mounting frame can be adjusted. When testing different types of lithium battery packs, you only need to move the positions of several probe assemblies on the probe mounting frame and make it compatible with the lithium battery to be tested. The probe assembly of the number of single cells on the group is in the extended state, and the rest of the probe assembly is in the retracted state. Different types of lithium battery packs can be tested without changing the type of probe module, which solves the problem. The problem of inconvenience in changing the needle module.

Obviously, the above-mentioned embodiments are merely examples for clear description, and are not intended to limit the implementation manners. For those of ordinary skill in the art, other changes or modifications in different forms can be made on the basis of the above description. It is unnecessary and impossible to list all the implementation methods here. The obvious changes or changes derived from this are still within the scope of protection created by this application.

Claims

A probe module, which is characterized in that it comprises a probe mounting frame and a plurality of probe assemblies mounted on the probe mounting frame with adjustable spacing, and the probe assembly includes:

The probe fixing seat is slidably mounted on the probe mounting frame and has a through hole opened in the axial direction;

The probe, movably installed in the through hole, has an extended state that extends outward relative to the probe holder and can contact the battery pack to be tested, and retracts inward relative to the probe holder and is in contact with the battery pack to be tested. Test the retracted state of the battery pack separation.
The probe module according to claim 1, wherein the probe mounting frame is provided with a sliding groove structure, and the probe fixing seat is slidably mounted on the sliding groove structure.
The probe module of claim 2, wherein the probe is a current probe.
The probe module according to claim 3, wherein the inner peripheral wall of the probe holder is provided with a first clamping position and a second clamping position sequentially arranged along the axial direction of the through hole; Current probes include:

Current probe needle body;

The current probe sleeve is fixedly sleeved on the outer circumference of the current probe needle body, and is provided with a current probe sleeve that can be buckled with the first locking position on the probe holder to make the current probe needle The body is in the extended state or is buckled with the second locking position so that the current probe needle body is in the retracted state;

The first elastic piece is sleeved on the outer circumference of the current probe sleeve and one end is connected to the top of the probe holder. Its elastic force drives the current probe sleeve to overcome its own gravity and makes the buckle body Buckle in the first card position or the second card position.
The probe module according to claim 4, wherein the sliding groove structure is a through groove provided on the probe mounting frame and penetrated through the bottom of the groove, and the probe assembly further includes The outer circumference of the current probe sleeve is connected to the probe mounting frame, and one end of the probe fixing seat opposite to the fixed top plate is provided with bottom walls located on opposite sides of the through groove from the probe mounting frame An abutting fixed bottom plate is provided with positioning pins, and a number of positioning holes corresponding to the positioning pins are opened on the bottom wall of the probe mounting frame.
The probe module according to claim 5, wherein a hook-shaped body is connected to the fixing base plate to facilitate holding the probe fixing seat so as to pull the positioning pin out of the positioning hole .
The probe module of claim 2, wherein the probe is a temperature probe.
The probe module according to claim 7, wherein a card slot is provided on the inner wall of the probe holder, and the temperature probe comprises:

A temperature probe mounting seat, which is fixedly connected to the probe holder and one end extends from the through hole on the probe holder;

The temperature probe needle body is movably connected to the temperature probe mounting seat along its axial direction, and one end is provided with a lower limit that can be inserted into the card slot so that the temperature probe needle body is in the retracted state The other end of the block is provided with an upper limit block that can resist the temperature probe mounting seat so that the temperature probe needle body is in the extended state;

The second elastic member is sleeved on the outer circumference of the temperature probe needle body. When the lower limit block of the temperature probe needle body comes out of the groove of the probe holder, its elasticity The force drives the temperature probe needle body to move from the retracted state to the extended state.
The probe module according to claim 8, wherein the sliding groove structure is a T-shaped sliding groove provided on the side wall of the probe mounting frame, and the probe holder is connected with A T-shaped block that is slidably installed on the T-shaped chute.
A modularized lithium battery testing device, characterized by comprising the probe module according to any one of claims 1-9.