A device for detecting the expansion force of lithium battery charging and discharging using a membrane box sensor

Abstract

The present invention discloses a device for detecting the expansion force of lithium battery charge and discharge using a membrane box sensor, comprising a base, and support plates are provided on both sides of the upper part of the base; a plurality of loading components are provided on the upper part of the base, and the loading components are slidably connected to the upper part of the base through a sliding assembly. The present invention relates to the technical field of battery detection equipment. The present invention sets a plurality of child sensors and a parent sensor, uses the child sensor to detect data of a single lithium battery, uses the parent sensor to detect total data of all lithium batteries, and analyzes the data measured by the child sensor and the parent sensor through an analysis processor, so as to determine whether the child sensor and the parent sensor are abnormal during the detection process, thereby ensuring the accuracy of the detection data of the expansion force of lithium battery charge and discharge, and there is no need to replace the corresponding detection unit to perform multiple detections and verifications on the lithium battery, which effectively shortens the time of lithium battery charge and discharge expansion force detection and improves the detection efficiency.

Description

Technical Field

[0001] The invention relates to the technical field of battery detection equipment, in particular to a device for detecting the expansion force of a lithium battery during charging and discharging by using a membrane box sensor. Background Art

[0002] During the operation of lithium batteries, a large amount of heat will accumulate due to chemical and electrochemical reactions inside them. When lithium batteries are used for a long time, although the battery will expand during normal charging and discharging, normal expansion can recover on its own. After multiple charge and discharge cycles, the battery may expand abnormally. When the battery expands to a certain extent, it cannot be used anymore. If it continues to be used, electrolyte leakage or even explosion may occur easily.

[0003] In the prior art, the expansion degree of a lithium battery is detected, and the expansion force data of the lithium battery obtained by the detection is too single, and the accuracy of the data measured by the corresponding detection unit cannot be determined. In order to determine the accuracy of the expansion force data of the lithium battery measured by the corresponding detection unit, it is necessary to switch the corresponding lithium battery to other detection units for verification. During the verification, the lithium battery is charged and discharged to obtain the expansion force data of the lithium battery, and the expansion force data measured twice by the lithium battery are compared to determine the accuracy of the expansion force data detection. Since the charging and discharging process of the lithium battery requires a certain amount of time, this method seriously affects the efficiency of the charging and discharging expansion force detection of the lithium battery.

[0004] In view of this, the present invention proposes a device for detecting the expansion force of a lithium battery during charge and discharge using a membrane box sensor. Summary of the invention

[0005] In view of the deficiencies in the prior art, the present invention provides a device for detecting the expansion force of a lithium battery during charging and discharging using a membrane box sensor, which solves the problems raised in the background art.

[0006] To achieve the above objectives, the present invention is implemented through the following technical solutions: a device for detecting the expansion force of a lithium battery during charge and discharge using a membrane box sensor, comprising a base, and support plates are provided on both sides of the upper part of the base;

[0007] A plurality of loading components are provided on the upper part of the base, and the loading components are slidably connected to the upper part of the base through a sliding assembly 1;

[0008] The loading component includes a loading main box and a transfer clamping plate, the bottom of the right side of the loading main box and the bottom of the left side of the transfer clamping plate are fixedly connected with a plurality of bearing strips, and the bearing strips at the loading main box and the transfer clamping plate are staggered, the inner side of the loading main box is connected with a sub-body sensor through a displacement component, and a pressure head 1 is provided inside, and the pressure head 1 is in contact with a pressure signal receiving end of the sub-body sensor;

[0009] The displacement component is used to adjust the pressure parameter of the sub-body sensor when the pressure head 1 contacts the pressure signal receiving end of the sub-body sensor;

[0010] The upper parts of the two groups of support plates are slidably connected with a transverse sliding rod through a second sliding assembly, and a position adjustment and verification component is provided in the middle of the transverse sliding rod;

[0011] The position adjustment and verification component comprises a parent sensor and a sliding sleeve, and the parent sensor is arranged at the bottom of the sliding sleeve through a mounting plate, and the transverse sliding rod and the sliding sleeve are slidably connected through three sliding components.

[0012] Preferably, there are supporting slide bars on both sides of the left surface of the transfer splint, and limiting slide barrels are provided on both sides of the right surface of the loading main box, the supporting slide bars penetrate the limiting slide barrels and extend to the inner side of the loading main box, and the supporting slide bars are slidably connected to the limiting slide barrels, and the two groups of supporting slide bars are commonly connected to a push rod at one end located on the inner side of the loading main box, and a pressure head is fixedly connected to the middle part of the push rod.

[0013] Preferably, the displacement component comprises two sets of limit sliding rods, a sleeve and an adjusting column frame, the limit sliding rod is fixedly connected to the right side of the inner cavity of the loading main body box, the sleeve is arranged on the outer side of the limit sliding rod and is slidably connected thereto, and a spring 1 is arranged between the sleeve and the limit sliding rod;

[0014] The two groups of sleeves are fixedly connected to a mounting frame, and the sub-body sensor is fixedly connected to the middle of the mounting frame.

[0015] Preferably, the inner side of the loading main body box is fixedly connected with a support cylinder through a bracket, and the two sides of the adjusting column frame penetrate the support cylinder and are slidably connected thereto, the upper parts of the two sides of the adjusting column frame are fixedly connected with limit rings, and the upper parts of the two sides of the adjusting column frame are provided with springs 2, and the springs 2 are located between the support cylinder and the limit rings, the adjusting column frame penetrates the upper surface of the loading main body box, and the middle part of the adjusting column frame is fixedly connected with a pressing plate, and one side of the pressing plate is fixedly connected with a second pressing head;

[0016] The bottom of the inner side of the adjusting column frame is fixedly connected with a bite seat, the upper surface of the bite seat is an arc-shaped structure, and the arc-shaped structure of the bite seat is adapted to the outer side of the bottom of the sleeve;

[0017] The outer side of the bottom of the limit sliding rod and the upper surface of the engagement seat are both provided with an engagement tooth pattern 1, and the engagement tooth pattern 1 between the limit sliding rod and the engagement seat engages with each other.

[0018] Preferably, the left surface of the loading main box and the right surface of the transfer clamping plate are both fixedly connected with abutments, and the abutments are used to press and contact the abutments between two groups of adjacent loading components.

[0019] Preferably, the plurality of parent sensors and child sensors are all diaphragm-type pressure sensors.

[0020] Preferably, a square limit opening is provided in the middle of the upper side of the sliding sleeve, and a positioning pressure plate is provided at the square limit opening, and the positioning pressure plate and the square limit opening are limitedly slidably arranged, the upper part of the sliding sleeve is spirally connected with a positioning screw through a threaded seat, and the bottom of the positioning screw is rotatably connected to the upper part of the positioning pressure plate;

[0021] The upper surface of the transverse sliding rod and the lower surface of the positioning pressing plate are both provided with two bite teeth, and the two bite teeth between the transverse sliding rod and the positioning pressing plate bite each other;

[0022] The upper end of the positioning screw is fixedly connected with a rotating handle, and the upper part of the positioning screw is spirally connected with a butterfly nut, and the butterfly nut is used to fix the positioning screw.

[0023] Preferably, the sliding assembly 1, the sliding assembly 2 and the sliding assembly 3 all include a sliding groove and a slider, and the slider is provided with a pulley, and the slider and the pulley are combined to be slidably connected with the sliding groove;

[0024] The sliding channel of one part of the sliding assembly is arranged in the middle of the surface of the base, and its corresponding sliding block is fixedly connected to the bottom of the loading member;

[0025] The sliding grooves at the two locations of the sliding assembly are arranged on the upper surface of the support plate, and the corresponding sliders are fixedly connected to the two ends of the horizontal sliding rod, and a positioning pin is arranged at one end of the sliding grooves at the two locations of the sliding assembly, and the positioning pin is used to position the corresponding slider;

[0026] The three sliding grooves of the sliding assembly are arranged on the side surface of the transverse sliding rod, and the corresponding sliding blocks are fixedly connected to the inner side of the sliding sleeve.

[0027] Preferably, an analysis processor is provided on one side of the base station, and the plurality of daughter sensors and the parent sensor are all connected to the analysis processor;

[0028] The analysis processor is used to perform data verification on the pressure parameters measured by the plurality of child sensors in combination with the parent sensor, obtain normal data and abnormal data, and display the verification results on the analysis processor.

[0029] Preferably, the analysis processor data verification method is as follows:

[0030] S1. Before charging and discharging, the lithium battery to be tested for charge and discharge expansion force is placed on a loading member on a base;

[0031] S2. After the lithium battery is placed, the values ​​of all the sub-body sensors and the parent body sensors are reset to zero, and then all the lithium batteries are charged and discharged at the same time;

[0032] S3, then divide the charge and discharge period into several standard time nodes, and then obtain the pressure parameters of multiple daughter sensors and parent sensors at each standard time node;

[0033] S4, taking a standard time node as an example, selecting effective pressure parameters measured by multiple sub-body sensors from the standard time node;

[0034] The effective pressure parameter indicates that the pressure parameter value of the sub-body sensor is greater than 0 during measurement, that is, an effective pressure parameter indicates that a lithium battery is placed in a loading component, and a sub-body sensor with a pressure parameter of 0 indicates that no lithium battery is placed in its corresponding loading component;

[0035] S5, then calculate the sum of all valid pressure parameters and mark it as YH, and then mark the pressure parameter monitored by the mother sensor as YC;

[0036] Next, compare YH with YC:

[0037] If the value of YH is within [YC*β, YC*], it means that the data measured by the sub-body sensor is valid, and the pressure parameters measured by each sub-body sensor are marked as normal data;

[0038] If the value of YH is not within [YC*β, YC*], it indicates that the data measured by the sub-body sensor is abnormal, and the pressure parameters measured by each sub-body sensor are marked as abnormal data, where β is a preset proportional coefficient.

[0039] Beneficial Effects

[0040] The present invention provides a device for detecting the expansion force of a lithium battery during charge and discharge using a membrane box sensor. Compared with the prior art, it has the following beneficial effects:

[0041] The present invention sets a plurality of child sensors and a parent sensor, uses the child sensor to perform data detection on a single lithium battery, uses the parent sensor to perform total data detection on all lithium batteries, and then uses an analysis processor to analyze the data measured by the child sensor and the parent sensor, so as to determine whether the child sensor and the parent sensor are abnormal during the detection process, thereby ensuring the accuracy of the lithium battery charge and discharge expansion force detection data, and there is no need to replace the corresponding detection unit to perform multiple detections and verifications on the lithium battery, which effectively shortens the time for lithium battery charge and discharge expansion force detection and improves detection efficiency.

[0042] The present invention can carry the lithium battery to be tested by arranging staggered load-bearing strips between the loading main box and the transfer clamping plate, and the loading main box and the transfer clamping plate are slidably connected by a supporting slide rod, which can be suitable for expansion force detection of lithium batteries of different thicknesses, thereby improving the applicability of the detection device.

[0043] The present invention uses a displacement component to facilitate the loading component to adjust the contact force between the pressure head and the sub-body sensor when placing a lithium battery, so that when the detection device performs expansion force detection on a larger lithium battery, it can avoid the pressure value of the pressure head pressing on the sub-body sensor exceeding the detection limit threshold of the sub-body sensor itself, thereby causing the sub-body sensor to be unable to effectively measure. At the same time, through the mutual engagement of the engagement teeth between the limit sliding rod and the engagement seat, the sub-body sensor can no longer follow the sleeve, and the detection work can be carried out.

[0044] The present invention sets the mother sensor on the horizontal sliding rod by sliding, and positions it by means of a positioning screw and a positioning pressure plate, so that the mother sensor can perform expansion force data aggregation detection on different numbers of lithium batteries. Meanwhile, the horizontal sliding rod is set on the support plate by sliding, so as to facilitate the placement of the lithium batteries to be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a top view of the structure of the present invention;

[0046] Figure 2 A top sectional view of the structure of the loading component of the present invention;

[0047] Figure 3 It is a left sectional view of the structure of the displacement component of the present invention;

[0048] Figure 4 It is a left sectional view of the structure of the position adjustment and verification component of the present invention;

[0049] Figure 5 The present invention is a flowchart of a method for analyzing a processor.

[0050] In the figure: 1. base; 11. support plate; 12. horizontal slide bar; 21. loading body box; 211. limit slide cylinder; 22. transfer splint; 221. support slide bar; 23. load-bearing strip; 24. push rod; 241. pressure head one; 25. stop block; 3. sub-body sensor; 41. limit slide bar; 42. sleeve; 43. adjustment column frame; 44. spring one; 45. mounting frame; 46. bite seat; 47. support cylinder; 48. spring two; 51. mother body sensor; 52. sliding sleeve; 53. positioning pressure plate; 54. positioning screw; 6. pressure head two. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0052] As embodiment 1 of the present invention

[0053] See also Figure 1-Figure 4 , the present invention provides a technical solution: a device for detecting the expansion force of lithium battery charging and discharging using a membrane box sensor, comprising a base 1, and support plates 11 are provided on both sides of the upper part of the base 1;

[0054] A plurality of loading components are provided on the upper portion of the base 1, and the loading components are slidably connected to the upper portion of the base 1 through a sliding assembly 1;

[0055] The loading component includes a loading main box 21 and a transfer clamping plate 22. A plurality of bearing strips 23 are fixedly connected to the bottom of the right side of the loading main box 21 and the bottom of the left side of the transfer clamping plate 22, and the bearing strips 23 at the loading main box 21 and the transfer clamping plate 22 are staggered.

[0056] The inner side of the loading main box 21 is connected with the sub-body sensor 3 through a displacement member;

[0057] There are support slide bars 221 on both sides of the left surface of the transfer clamping plate 22, and there are limit slide barrels 211 on both sides of the right surface of the loading main body box 21. The support slide bar 221 penetrates the limit slide barrel 211 and extends to the inner side of the loading main body box 21, and the support slide bar 221 is slidably connected with the limit slide barrel 211. One end of the two groups of support slide bars 221 located on the inner side of the loading main body box 21 is commonly connected with a push rod 24, and a pressure head 241 is fixedly connected to the middle part of the push rod 24, and the pressure head 241 is in contact with the pressure signal receiving end of the sub-body sensor 3;

[0058] This embodiment can carry the lithium battery to be tested by setting staggered load-bearing strips 23 between the loading main box 21 and the transfer splint 22, and the loading main box 21 and the transfer splint 22 are slidably connected by a supporting slide bar 221, which can be suitable for expansion force detection of lithium batteries of different thicknesses, thereby improving the applicability of the detection device.

[0059] The displacement component includes two sets of limit slide bars 41, sleeves 42 and adjustment column frames 43. The limit slide bars 41 are fixedly connected to the right side of the inner cavity of the loading main box 21. The sleeves 42 are arranged on the outer side of the limit slide bars 41 and are slidably connected thereto. A spring 44 is arranged between the sleeves 42 and the limit slide bars 41.

[0060] The two sets of sleeves 42 are fixedly connected to a mounting frame 45, and the sub-body sensor 3 is fixedly connected to the middle of the mounting frame 45;

[0061] The inner side of the loading main box 21 is fixedly connected with a support tube 47 through a bracket, and both sides of the adjustment column frame 43 penetrate the support tube 47 and are slidably connected thereto, the upper parts of both sides of the adjustment column frame 43 are fixedly connected with limit rings, and the upper parts of both sides of the adjustment column frame 43 are provided with springs 48, and the springs 48 are located between the support tube 47 and the limit rings, the adjustment column frame 43 penetrates the upper surface of the loading main box 21, and the middle part of the adjustment column frame 43 is fixedly connected with a pressing plate, and one side of the pressing plate is fixedly connected with a pressing head 6;

[0062] In this embodiment, the adjustment column frame 43 is a frame structure composed of a plurality of columns. The combined frame structure is used to facilitate the installation and use of the adjustment column frame 43.

[0063] The bottom of the inner side of the adjusting column frame 43 is fixedly connected with a bite seat 46, the upper surface of the bite seat 46 is an arc structure, and the arc structure of the bite seat 46 is adapted to the outer side of the bottom of the sleeve 42;

[0064] The outer side of the bottom of the limiting slide bar 41 and the upper surface of the engaging seat 46 are both provided with engaging tooth patterns 1, and the engaging tooth patterns 1 between the limiting slide bar 41 and the engaging seat 46 engage with each other;

[0065] In this embodiment, when the lithium battery is testing the expansion force of charge and discharge, the pressing plate is first pressed, and then the column frame 43 is adjusted to drive the bite seat 46 to move downward, and the bite tooth pattern 1 between the limit slide bar 41 and the bite seat 46 is no longer engaged, and then the lithium battery is placed on the load-bearing strip 23 between the loading main box 21 and the transfer clamping plate 22, and then the transfer clamping plate 22 is pulled so that the two sides of the lithium battery are attached to the surface of the loading main box 21 and the transfer clamping plate 22. During the adjustment process, the pressure head 1 241 is always in contact with the sub-body sensor 3 through the elastic force of the spring 1 44, and then the adjustment column frame 43 is released, so that the spring 2 48 pushes the limit ring, and then the bite tooth pattern 1 between the limit slide bar 41 and the bite seat 46 is engaged with each other, so that the sleeve 42 is positioned;

[0066] This embodiment uses a displacement component to facilitate the loading component to adjust the contact force between the pressing head 241 and the sub-body sensor 3 when placing a lithium battery, so that when the detection device detects the expansion force of a larger lithium battery, it can avoid the pressure value of the pressing head 241 on the sub-body sensor 3 exceeding the detection limit threshold of the sub-body sensor 3 itself, thereby causing the sub-body sensor 3 to be unable to effectively measure. At the same time, through the mutual engagement of the engaging teeth between the limiting slide bar 41 and the engaging seat 46, the sub-body sensor 3 can no longer follow the sleeve 42, and the detection work can be carried out.

[0067] The left surface of the loading main box 21 and the right surface of the transfer clamping plate 22 are both fixedly connected with a stopper 25, and the stopper 25 is used for the stoppers 25 between two groups of adjacent loading components to press and contact each other;

[0068] In this embodiment, a plurality of loading components with lithium batteries placed thereon are slid to the left side of the base 1, and a plurality of groups of abutments 25 between adjacent loading components are in abutment contact;

[0069] The upper parts of the two groups of support plates 11 are slidably connected to a horizontal sliding rod 12 through a sliding assembly 2, and a position adjustment and verification component is provided in the middle of the horizontal sliding rod 12;

[0070] The position adjustment and verification component includes a parent sensor 51 and a sliding sleeve 52, and the parent sensor 51 is arranged at the bottom of the sliding sleeve 52 through a mounting plate, and the horizontal sliding rod 12 and the sliding sleeve 52 are slidably connected through three sliding components;

[0071] In this embodiment, the plurality of parent sensors 51 and the child sensors 3 are all diaphragm-type pressure sensors; and the pressure value monitored by the child sensor 3 is negligibly affected by the friction between the support slide bar 221 and the limit slide cylinder 211;

[0072] A square limit opening is provided in the middle of the upper side of the sliding sleeve 52, and a positioning plate 53 is provided at the square limit opening, and the positioning plate 53 is slidingly arranged with the square limit opening, and a positioning screw 54 is spirally connected to the upper part of the sliding sleeve 52 through a threaded seat, and the bottom of the positioning screw 54 is rotatably connected to the upper part of the positioning plate 53.

[0073] The upper surface of the horizontal slide bar 12 and the lower surface of the positioning plate 53 are both provided with two bite teeth, and the two bite teeth between the horizontal slide bar 12 and the positioning plate 53 are mutually engaged;

[0074] The upper end of the positioning screw 54 is fixedly connected with a rotating handle, and the upper part of the positioning screw 54 is spirally connected with a butterfly nut, which is used for secondary fixing of the positioning screw 54 to prevent the positioning screw 54 from slipping out when the positioning screw 54 rotates to press the positioning plate 53 downward, causing the positioning plate 53 to be relaxed;

[0075] In this embodiment, firstly, according to the number of lithium batteries placed, the sliding sleeve 52 is roughly adjusted to the position of the second pressing head 6 at the corresponding loading member, and then the horizontal sliding rod 12 is slid from the edge position to the middle position of the support plate 11, and then the horizontal sliding rod 12 is positioned by the positioning pin, and then the sliding sleeve 52 is slid to make the parent sensor 51 contact with the second pressing head 6, and then the positioning screw 54 is rotated so that the positioning screw 54 presses down the positioning pressure plate 53, so that the two interlocking teeth between the horizontal sliding rod 12 and the positioning pressure plate 53 are interlocked and positioned, and then the butterfly nut is tightened;

[0076] In this embodiment, the mother sensor 51 is slidably set on the cross-sliding rod 12, and is positioned by the positioning screw 54 and the positioning pressure plate 53, so that the mother sensor 51 can perform expansion force data aggregation detection on different numbers of lithium batteries. At the same time, the cross-sliding rod 12 is slidably set on the support plate 11, which is convenient for the placement of the lithium batteries to be tested.

[0077] The sliding assembly 1, the sliding assembly 2 and the sliding assembly 3 all include a sliding groove and a slider, and a pulley is provided on the slider. The slider is used for limited sliding between the sliding groove, and the pulley is used to reduce friction, thereby assisting the slider in sliding and enhancing the smoothness of the slider position;

[0078] A sliding channel of one part of the sliding assembly is arranged in the middle of the surface of the base 1, and its corresponding sliding block is fixedly connected to the bottom of the loading member;

[0079] The sliding grooves at the second sliding assembly are provided on the upper surface of the support plate 11, and the corresponding sliding blocks are fixedly connected to the two ends of the horizontal sliding rod 12;

[0080] The sliding grooves at three locations of the sliding assembly are provided on the side surface of the horizontal sliding rod 12, and the corresponding sliding blocks thereof are fixedly connected to the inner side of the sliding sleeve 52;

[0081] A positioning pin is provided at one end of the two sliding grooves of the sliding assembly, and the positioning pin is used to position the corresponding slider, so that the position of the horizontal sliding rod 12 is fixed. In this embodiment, the positioning pin is a common technical means, so it is not described in detail.

[0082] As the second embodiment of the present invention

[0083] See also Figure 5 In this embodiment, based on the first embodiment, an analysis processor is provided on one side of the base station 1, and a plurality of sub-body sensors 3 and a parent body sensor 51 are all connected to the analysis processor;

[0084] The analysis processor is used to verify the data of the pressure parameters measured by the plurality of sub-sensors 3 in combination with the parent sensor 51;

[0085] The data verification method is as follows:

[0086] S1. Before charging and discharging, the lithium battery to be tested for expansion force of charging and discharging is placed on the loading member on the base 1;

[0087] S2, after the lithium battery is placed, the values ​​of all the sub-body sensors and the parent body sensor 51 are reset to zero, and then all the lithium batteries are charged and discharged at the same time;

[0088] S3, then divide the charging and discharging period into several standard time nodes, and then obtain the pressure parameters of multiple child sensors 3 and parent sensor 51 at each standard time node;

[0089] S4, taking a standard time node as an example, selecting effective pressure parameters measured by multiple sub-body sensors 3 from the standard time node;

[0090] The effective pressure parameter indicates that the pressure parameter value of the sub-body sensor 3 is greater than 0 during measurement, that is, an effective pressure parameter indicates that a lithium battery is placed in a loading component, and a sub-body sensor 3 with a pressure parameter of 0 indicates that no lithium battery is placed in its corresponding loading component;

[0091] S5, then calculate the sum of all valid pressure parameters and mark it as YH, then mark the pressure parameter monitored by the mother sensor 51 as YC;

[0092] Next, compare YH with YC:

[0093] If the value of YH is within YC*β, YC*2-β, it means that the data measured by the sub-body sensor 3 is valid, and the pressure parameters measured by each sub-body sensor 3 are marked as normal data;

[0094] If the value of YH is not within the range of YC*β, YC*2-β, it means that the data measured by the sub-body sensor 3 is abnormal, and the pressure parameters measured by each sub-body sensor 3 are marked as abnormal data;

[0095] β is a preset proportionality coefficient. In this embodiment, the value of β is 0.9825.

[0096] S6. Display the obtained normal data and / or abnormal data on the analysis processor.

[0097] In this embodiment, multiple child sensors 3 and parent sensors 51 are set up, and the child sensor 3 is used to perform data detection on a single lithium battery, and the parent sensor 51 is used to perform total data detection on all lithium batteries. The data measured by the child sensor 3 and the parent sensor 51 are then analyzed by the analysis processor, so as to determine whether the child sensor 3 and the parent sensor 51 are abnormal during the detection process, thereby ensuring the accuracy of the lithium battery charge and discharge expansion force detection data. There is no need to replace the corresponding detection unit to perform multiple detection and verification on the lithium battery, which effectively shortens the time for lithium battery charge and discharge expansion force detection and improves detection efficiency.

[0098] As the third embodiment of the present invention

[0099] This embodiment combines the first embodiment and the second embodiment.

[0100] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

[0101] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0102] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for detecting the expansion force of a lithium battery during charging and discharging using a membrane box sensor, comprising: It comprises a base (1), and support plates (11) are provided on both sides of the upper part of the base (1); The upper part of the base (1) is provided with a plurality of loading components, and the loading components are slidably connected to the upper part of the base (1) via a sliding assembly; The loading component comprises a loading main body box (21) and a transfer clamp (22), the bottom of the right side of the loading main body box (21) and the bottom of the left side of the transfer clamp (22) are both fixedly connected with a plurality of bearing strips (23), and the bearing strips (23) at the loading main body box (21) and the transfer clamp (22) are staggered, the inner side of the loading main body box (21) is connected with a sub-body sensor (3) through a displacement component, and a pressure head (241) is provided inside the (21), and the pressure head (241) is in contact with a pressure signal receiving end of the sub-body sensor (3); The displacement component is used to adjust the pressure parameter of the sub-body sensor (3) when the first pressure head (241) contacts the pressure signal receiving end of the sub-body sensor (3); The upper parts of the two groups of support plates (11) are slidably connected to a transverse sliding rod (12) via a second sliding assembly, and a position adjustment and verification component is provided in the middle of the transverse sliding rod (12); The position adjustment and verification component comprises a parent sensor (51) and a sliding sleeve (52), wherein the parent sensor (51) is arranged at the bottom of the sliding sleeve (52) via a mounting plate, and the transverse sliding rod (12) and the sliding sleeve (52) are slidably connected via three sliding components.

2. A device for detecting the expansion force of a lithium battery charging and discharging using a membrane box sensor according to claim 1, characterized in that: Support slide bars (221) are provided on both sides of the left surface of the transfer clamping plate (22), and limiting slide barrels (211) are provided on both sides of the right surface of the loading main body box (21), the support slide bars (221) penetrate the limiting slide barrels (211) and extend to the inner side of the loading main body box (21), and the support slide bars (221) are slidably connected to the limiting slide barrels (211), and one end of the two groups of support slide bars (221) located on the inner side of the loading main body box (21) is commonly connected to a push rod (24), and a pressing head (241) is fixedly connected to the middle part of the push rod (24).

3. A device for detecting the expansion force of a lithium battery charging and discharging using a membrane box sensor according to claim 2, characterized in that: The displacement component comprises two groups of limiting sliding rods (41), a sleeve (42) and an adjusting column frame (43); the limiting sliding rod (41) is fixedly connected to the right side of the inner cavity of the loading main box (21); the sleeve (42) is arranged on the outer side of the limiting sliding rod (41) and is slidably connected thereto; and a spring (44) is arranged between the sleeve (42) and the limiting sliding rod (41); A mounting frame (45) is fixedly connected between the two groups of sleeves (42), and the sub-body sensor (3) is fixedly connected to the middle part of the mounting frame (45).

4. The device for detecting the expansion force of a lithium battery charging and discharging using a membrane box sensor according to claim 3, characterized in that: The inner side of the loading main body box (21) is fixedly connected with a support tube (47) through a bracket, and both sides of the adjustment column frame (43) pass through the support tube (47) and are slidably connected thereto, the upper parts of both sides of the adjustment column frame (43) are fixedly connected with limit rings, and the upper parts of both sides of the adjustment column frame (43) are provided with spring 2 (48), and the spring 2 (48) is located between the support tube (47) and the limit ring, the adjustment column frame (43) passes through the upper surface of the loading main body box (21), and the middle part of the adjustment column frame (43) is fixedly connected with a pressing plate, and one side of the pressing plate is fixedly connected with a second pressing head (6); The bottom of the inner side of the adjusting column frame (43) is fixedly connected with a bite seat (46), the upper surface of the bite seat (46) is an arc-shaped structure, and the arc-shaped structure of the bite seat (46) is adapted to the outer side of the bottom of the sleeve (42); The outer side of the bottom of the limit sliding rod (41) and the upper surface of the bite seat (46) are both provided with bite teeth, and the bite teeth between the limit sliding rod (41) and the bite seat (46) are mutually engaged.

5. The device for detecting the expansion force of a lithium battery charging and discharging using a membrane box sensor according to claim 1, characterized in that: The left surface of the loading main box (21) and the right surface of the transfer clamping plate (22) are both fixedly connected with a stop block (25), and the stop block (25) is used for the stop blocks (25) between two groups of adjacent loading components to press and contact each other.

6. The device for detecting the expansion force of a lithium battery charging and discharging using a membrane box sensor according to claim 1, characterized in that: The plurality of parent sensors (51) and child sensors (3) are all diaphragm-type pressure sensors.

7. The device for detecting the expansion force of a lithium battery charging and discharging using a membrane box sensor according to claim 1, characterized in that: A square limiting opening is provided in the middle of the upper side of the sliding sleeve (52), and a positioning pressing plate (53) is provided at the square limiting opening, and the positioning pressing plate (53) and the square limiting opening are slidingly arranged in a limiting manner, and a positioning screw (54) is spirally connected to the upper part of the sliding sleeve (52) through a threaded seat, and the bottom of the positioning screw (54) is rotatably connected to the upper part of the positioning pressing plate (53); The upper surface of the transverse sliding rod (12) and the lower surface of the positioning pressing plate (53) are both provided with two bite teeth, and the two bite teeth between the transverse sliding rod (12) and the positioning pressing plate (53) are mutually engaged; The upper end of the positioning screw (54) is fixedly connected with a rotating handle, and the upper part of the positioning screw (54) is spirally connected with a butterfly nut, and the butterfly nut is used to fix the positioning screw (54).

8. The device for detecting the expansion force of a lithium battery charging and discharging using a membrane box sensor according to claim 1, characterized in that: The sliding assembly 1, the sliding assembly 2 and the sliding assembly 3 all include a sliding groove and a sliding block, and a pulley is provided on the sliding block, and the sliding block and the pulley are combined to be slidably connected with the sliding groove; The sliding channel of one part of the sliding assembly is arranged in the middle of the surface of the base (1), and its corresponding sliding block is fixedly connected to the bottom of the loading component; The sliding grooves at the two locations of the sliding assembly are arranged on the upper surface of the support plate (11), and the corresponding sliding blocks are fixedly connected to the two ends of the transverse sliding rod (12), and a positioning pin is arranged at one end of the sliding grooves at the two locations of the sliding assembly, and the positioning pin is used to position the corresponding sliding block; The sliding grooves at three locations of the sliding assembly are arranged on the side surface of the transverse sliding rod (12), and the corresponding sliding blocks are fixedly connected to the inner side of the sliding sleeve (52).

9. The device for detecting the expansion force of a lithium battery charging and discharging using a membrane box sensor according to claim 1, characterized in that: An analysis processor is provided on one side of the base station (1), and a plurality of daughter sensors (3) and a parent sensor (51) are all connected to the analysis processor; The analysis processor is used to perform data verification on the pressure parameters measured by the plurality of sub-sensors (3) in combination with the parent sensor (51), obtain normal data and abnormal data, and display the verification results on the analysis processor.

10. The device for detecting the expansion force of a lithium battery charging and discharging using a membrane box sensor according to claim 9, characterized in that: The analysis processor data verification method is as follows: S1. Before charging and discharging, placing a lithium battery to be tested for expansion force during charging and discharging on a loading member on a base (1); S2, after the lithium battery is placed, the values ​​of all the sub-body sensors and the parent body sensor (51) are reset to zero, and then all the lithium batteries are charged and discharged simultaneously; S3, then dividing the charging and discharging period into a number of standard time nodes, and then obtaining the pressure parameters of a plurality of sub-body sensors (3) and a parent body sensor (51) at each standard time node; S4, taking a standard time node as an example, selecting effective pressure parameters measured by multiple sub-body sensors (3) from the standard time node; The effective pressure parameter indicates that the pressure parameter value of the sub-body sensor (3) is greater than 0 during measurement, that is, an effective pressure parameter indicates that a lithium battery is placed in a loading component, and a sub-body sensor (3) with a pressure parameter of 0 indicates that no lithium battery is placed in the corresponding loading component; S5, then calculate the sum of all valid pressure parameters and mark it as YH, then mark the pressure parameter monitored by the mother sensor (51) as YC; Next, compare YH with YC: If the value of YH is within [YC*β, YC*(2-β)], it means that the data measured by the sub-body sensor (3) is valid, and the pressure parameters measured by each sub-body sensor (3) are marked as normal data; If the value of YH is not within [YC*β, YC*(2-β)], it indicates that the data measured by the sub-body sensor (3) is abnormal, and the pressure parameters measured by each sub-body sensor (3) are marked as abnormal data, wherein β is a preset proportionality coefficient.

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