Pressure detection device and formation and capacity grading equipment

Abstract

The invention relates to the technical field of lithium battery formation and capacity grading, and discloses a pressure detection device and formation and capacity grading equipment. The pressure detection device is used for detecting a probe module of the formation and capacity grading equipment, the probe module comprises a plurality of probes, and the plurality of probes are used for abutting against a battery cell. The pressure detection device comprises a base and a plurality of detection assemblies, wherein the plurality of detection assemblies are arranged on the base. Wherein the detection assembly is used for abutting against the probe and is used for detecting the pressure applied to the detection assembly by the probe. The magnitude of the pressure can reflect the deformation degree of the probe, specifically, if the pressure applied by the probe to the detection assembly is large, it is indicated that the probe and the detection assembly can keep good contact, and the probe does not deform or the deformation amount is small. If the pressure applied by the probe to the detection assembly is small, the probe is bent and deformed, so that the probe cannot be in good contact with the detection assembly, and the pressure borne by the detection assembly is small.

Description

Technical Field

[0001] The present invention relates to the technical field of battery capacity division, and in particular to a pressure detection device and a battery capacity division equipment. Background Art

[0002] As an energy storage unit, lithium battery can realize the mutual conversion of chemical energy and electrical energy. The production process of lithium battery is divided into three stages: front, middle and back. The purpose of the front process is to process the raw materials into pole pieces, the purpose of the middle process is to process the pole pieces into unactivated cells, and the purpose of the back process is to chemically package the cells. In the back process, it is necessary to use chemical composition equipment to chemically composition the battery to activate the cells and screen the capacity.

[0003] In one prior art, a capacity splitting device includes a probe module, and the probe module includes multiple types of probes, which are used to abut against battery cells. For example, the probe module includes a positive probe and a negative probe, wherein the positive probe is used to abut against the positive pole of the battery cell, so as to have good contact with the positive pole of the battery cell; the negative probe is used to abut against the negative pole of the battery cell, so as to have good contact with the negative pole of the battery cell. However, the probes will squeeze each other in the process of contacting the battery cell, and the probes will bend and deform when they are squeezed for a long time, so as to have poor contact with the battery cell, thereby affecting the capacity splitting effect of the battery cell. At present, it is not easy to obtain the deformation of the probes during the use of the capacity splitting device, so that the probes with larger deformation cannot be replaced or repaired in time, thereby affecting the capacity splitting of the battery cell. Summary of the invention

[0004] The present invention provides a pressure detection device and a chemical composition capacity device, which are used to solve the problem in the prior art that it is difficult to obtain the deformation of the probe of the chemical composition capacity device during use, so that the probe with large deformation cannot be replaced or repaired in time, thereby affecting the chemical composition capacity of the battery cell.

[0005] In a first aspect, the present invention provides a pressure detection device. The pressure detection device is used to detect a probe module of a chemical component capacity device; the probe module includes a plurality of probes, and the plurality of probes are used to abut against a battery cell;

[0006] The pressure detection device comprises a base and a plurality of detection components, wherein the plurality of detection components are arranged on the base; the detection components are used to abut against the probe and detect the pressure applied by the probe.

[0007] The beneficial effects of the pressure detection device provided by the present invention are as follows:

[0008] In the process of the pressure detection device detecting the probe, the detection component and the probe are in contact with each other, and the detection component can detect the pressure applied by the probe to it. The magnitude of the pressure can be reflected by a numerical value or by an indentation produced by the detection component. Before the cell is firstly subjected to the capacity separation device, the pressure detection device and the probe module can have a first positional relationship, at which time the detection component and the probe are in contact with each other; then, the initial pressure applied by the probe to it is detected by the detection component, and the initial pressure is saved. In the subsequent process of detecting the probe, the pressure detection device and the probe module are still in the first positional relationship; then, the actual pressure applied by the probe to it is detected by the detection component. Compared with the initial pressure, when the actual pressure applied by the probe to the detection component is smaller, it means that the probe and the detection component are in poor contact and the probe has been deformed. When the actual pressure applied by the probe to the detection component is close to the initial pressure, it means that the probe has not been deformed, or the deformation of the probe is small. In this way, for probes with large deformation, the probes can be replaced or repaired in time, thereby reducing the impact of the deformation of the probe on the capacity separation of the cell.

[0009] In a second aspect, the present invention further provides a chemical component storage device. The chemical component storage device comprises a frame, a probe module, a driving device and the pressure detection device described in the first aspect above;

[0010] The probe module is arranged on the frame, and the driving device is connected to the probe module and is used to drive the probe module to move along the third direction;

[0011] The frame has a containing space, the containing space and the probe module are arranged along the third direction, and the containing space is used to contain the battery cell or the pressure detection device.

[0012] The beneficial effects of the chemical fractionation equipment provided by the present invention are as follows:

[0013] During the use of the above-mentioned capacity splitting equipment, when the battery cells need to be capacity split, the accommodation space in the frame is used to accommodate the battery cells. Moreover, under the drive of the driving device, the probes included in the probe module can abut against the battery cells. When the probes need to be tested, the accommodation space in the frame is used to accommodate the pressure detection device. Moreover, under the drive of the driving device, the probes in the probe module can abut against the detection components in the pressure detection device. The detection component can detect the actual pressure applied by the probe, and by comparing the measured actual pressure with the initial pressure, the degree of deformation of the probe can be determined. For probes with large deformation, the probes can be replaced or repaired in time, thereby reducing the impact of the deformation of the probe on the capacity splitting of the battery cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a chemical fractionation and capacity separation device provided in an embodiment of the present application;

[0015] Figure 2 A schematic diagram of the structure of a probe module provided in an embodiment of the present application;

[0016] Figure 3 A schematic diagram of the structure of a pressure detection device provided in an embodiment of the present application;

[0017] Figure 4 for Figure 3 An internal schematic diagram of the pressure detection device shown;

[0018] Figure 5 A schematic diagram of installing the detection component provided in an embodiment of the present application on a base;

[0019] Figure 6 A schematic diagram of another installation of the detection component provided in an embodiment of the present application on a base;

[0020] Figure 7 A schematic diagram of the structure of a base provided in an embodiment of the present application;

[0021] Figure 8 Another structural schematic diagram of a base provided in an embodiment of the present application;

[0022] Fig. 9 A schematic diagram of an arrangement of support columns provided in an embodiment of the present application;

[0023] Fig.10 A schematic diagram of the structure of a tray provided in an embodiment of the present application.

[0024] Reference numerals:

[0025] 10- rack; 20- probe module;

[0026] 21-probe; 211-first probe;

[0027] 212-second probe; 30-driving device;

[0028] 40-pressure detection device; 41-base;

[0029] 4101-first mounting surface; 4102-second mounting surface;

[0030] 411-base plate; 412-surrounding frame;

[0031] 4121-first side wall; 4122-second side wall;

[0032] 413- boss; 4131- first surface;

[0033] 4132-protruding structure; 414-support column;

[0034] 4141-first support column; 4142-second support column;

[0035] 42-detection component; 421-first detection component;

[0036] 422-second detection component; 43-display component;

[0037] 431-display screen; 50-limit stopper;

[0038] 60-Pallet C-Accommodation Space. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the example embodiments of the present application to clearly and completely describe the technical solutions in the example embodiments of the present application. The example embodiments described herein are only for illustrative purposes and are not intended to limit the scope of protection of the present application. Therefore, it should be understood that various modifications and changes can be made to the example embodiments without departing from the scope of protection of the present application.

[0040] In the description of the present application, unless otherwise expressly specified and limited, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance; the term "plurality" refers to two or more; the term "and / or" includes any and all combinations of one or more associated listed items. In particular, reference to "the / the" object or "an" object is also intended to indicate one of a possible plurality of such objects.

[0041] Unless otherwise specified or explained, the terms "connection", "fixed", etc. should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, an integral connection, an electrical connection, or a signal connection; "connection" can be a direct connection or an indirect connection through an intermediate medium. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0042] Further, in the description of the present application, it should be understood that the directional words such as "upper", "lower", "inner", "outer" and the like described in the example embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limitations on the example embodiments of the present application. It should also be understood that, in the context, when it is mentioned that an element or feature is connected to another element (one or more) "upper", "lower", "inner", "outer", it can not only be directly connected to the other (one or more) elements "upper", "lower", "inner", "outer", but also can be indirectly connected to the other (one or more) elements "upper", "lower", "inner", "outer" through an intermediate element.

[0043] Figure 1 A schematic diagram of a structure of a chemical fractionation and content-splitting device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, in one embodiment, the chemical fractionation device includes a frame 10, a probe module 20 and a driving device 30. The probe module 20 and the driving device 30 are arranged on the frame 10. The driving device 30 is connected to the probe module 20 and is used to drive the probe module 20 to move along a third direction Z. Optionally, the third direction Z is a vertical direction.

[0044] The rack 10 has a storage space C, and the storage space C and the probe module 20 are arranged along the third direction Z, and the multiple probes 21 included in the probe module 20 are all arranged toward the storage space C. In one embodiment, the storage space C is located directly below the probe module 20. The storage space C can be used to accommodate the battery cell. After the battery cell is placed in the storage space C, the chemical formation and capacity separation equipment can perform chemical formation and capacity separation on the battery cell.

[0045] Figure 2 A schematic diagram of the structure of the probe module provided in the embodiment of the present application is shown as follows: Figure 2 As shown, the probe module 20 includes a plurality of probes 21, which are arranged at intervals. In the process of dissolving the battery cells, the plurality of probes 21 are used to abut against the battery cells, thereby maintaining good contact with the battery cells. The driving device 30 drives the probe module 20 to move along the vertical direction Z, so that the probe 21 can abut against the battery cells, or the probe 21 can be separated from the battery cells.

[0046] When the probe module 20 is specifically set, the probe module 20 includes a plurality of probes 21. For example, the probe module 20 includes a positive probe and a negative probe, wherein the positive probe is used to abut against the positive pole of the battery cell, and the negative probe is used to abut against the negative pole of the battery cell. After the positive probe and the positive pole of the battery cell are connected, and the negative probe and the negative pole of the battery cell are connected, the capacity splitting device can charge the battery cell, thereby activating the battery cell, and can also measure the capacity of the battery cell for capacity screening. Once the above-mentioned probe 21 is deformed, the above-mentioned probe 21 and the battery cell will have poor contact, thereby causing the probe 21 to burn and be damaged, and affecting the capacity splitting of the battery cell.

[0047] For another example, the probe module 20 also includes a negative pressure probe, which has a gas channel and is used to communicate with the injection hole of the battery cell. The negative pressure probe can inject gas into the interior of the battery cell or discharge the gas inside the battery cell during the charging and discharging process of the battery cell, so that the internal pressure of the battery cell remains stable during the charging and discharging process. Once the negative pressure probe is deformed, the negative pressure probe and the battery cell will not be sealed well, thereby affecting the stability of the internal pressure of the battery cell during the charging and discharging process.

[0048] For another example, the probe module 20 also includes a temperature probe, which is used to abut against the shell of the battery cell to measure the temperature of the battery cell during the charging and discharging process of the battery cell. Once the temperature probe is deformed, the temperature probe and the battery cell will have poor contact, resulting in temperature test distortion, affecting capacity prediction, and posing a risk of fire.

[0049] In order to obtain the deformation of the probe 21 so as to timely replace or repair the probe 21 with a large deformation, the above-mentioned chemical fractionation equipment further includes a pressure detection device 40 . Figure 3 A schematic diagram of the structure of a pressure detection device provided in an embodiment of the present application, Figure 4 is an internal schematic diagram of the pressure detection device, such as Figure 3 and Figure 4 As shown, in some embodiments, the pressure detection device 40 includes a base 41 and a plurality of detection components 42, and the plurality of detection components 42 are disposed on the base 41. The detection component 42 is used to abut against the probe 21 and detect the pressure applied by the probe 21 thereto.

[0050] The magnitude of the pressure can reflect the degree of deformation of the probe 21. Specifically, if the pressure applied by the probe 21 to the detection component 42 is large, it means that the probe 21 and the detection component 42 can maintain good contact, and the probe 21 has not deformed or has a small deformation. If the pressure applied by the probe 21 to the detection component 42 is small, it means that the probe 21 has been bent and deformed, and thus cannot maintain good contact with the detection component 42, and the pressure on the detection component 42 is small.

[0051] The above-mentioned pressure detection device 40 and the frame 10 are independent of each other. When the probe 21 needs to be detected, the pressure detection device 40 can be moved into the frame 10. At this time, the pressure detection device 40 and the probe module 20 have a spacing along the third direction Z. The driving device 30 can drive the probe module 20 to move along the third direction Z so that the probe 21 and the detection component 42 abut against each other. After the detection is completed, the driving device 30 can drive the probe module 20 to reset so that the probe 21 and the detection component 42 are separated. Then, the pressure detection device 40 can be moved out of the frame 10 to make room for the battery cell.

[0052] When the detection components 42 are specifically configured, the number of the detection components 42 is greater than or equal to the number of the probes 21 , thereby ensuring that each probe 21 can be detected. Optionally, the number of the detection components 42 is the same as the number of the probes 21 .

[0053] The detection component 42 includes multiple types. In one embodiment, the detection component 42 includes a pressure sensor, which can measure the pressure applied by the probe 21 to obtain a pressure value. Before the cell is first subjected to the first fractionation by the fractionation device, the pressure sensor can measure the initial pressure applied by the probe 21 to the cell, which is reflected in a numerical value and recorded as the initial pressure value.

[0054] Specifically, the above-mentioned initial pressure value can be obtained in the following manner: before the cell is firstly capacitated by the capacitating device, the pressure detection device 40 is moved into the frame 10 and placed at a position corresponding to the probe module 20; the driving device 30 drives the probe module 20 to move a set distance Z1 along the third direction Z so that the pressure sensor and the probe 21 are in contact with each other; and the pressure value applied by the probe 21 to each pressure sensor measured by the pressure sensor is determined, and the pressure value is the initial pressure value.

[0055] Optionally, each probe 21 corresponds to an initial pressure value. Alternatively, probes 21 of the same type correspond to an initial pressure value.

[0056] During the detection of the probe 21, the driving device 30 drives the probe module 20 to move a set distance Z1 along the third direction Z, so that the pressure sensor and the probe 21 are in contact, and the pressure sensor can measure the pressure value currently applied to it by the probe 21. If the difference between the pressure value currently measured by the pressure sensor and the initial pressure value is within the preset range, it means that the probe 21 and the pressure sensor are in good contact, and the probe 21 has not deformed or the deformation is small. If the pressure value currently measured by the pressure sensor is less than the initial pressure value, and the difference between the two is outside the preset range, it means that the probe 21 and the pressure sensor are in poor contact, and the probe 21 is bent and deformed, and the deformation is large.

[0057] In another embodiment, the detection component 42 includes pressure-sensitive paper. The pressure-sensitive paper will produce an indentation after being squeezed by the probe 21, and the depth of the indentation can reflect the pressure applied by the probe 21 to the pressure-sensitive paper. Before the cell is firstly processed by the cell-splitting device, the pressure-sensitive paper can measure the initial pressure applied by the probe 21 to it, and the initial pressure is reflected by the indentation, which is recorded as the initial indentation.

[0058] Specifically, the above-mentioned initial indentation can be obtained in the following manner: before the cell is capacitated for the first time by the capacitating device, the pressure detection device 40 is moved into the frame 10 and placed at a position corresponding to the probe module 20; the pressure detection device 40 or the probe module 20 is driven by the driving device 30 to move a set distance Z2 along the third direction Z, so that the pressure-sensitive paper and the probe 21 are in contact with each other; under the squeezing action of the probe 21, the pressure-sensitive paper produces an indentation, which is the initial indentation.

[0059] During the detection of the probe 21, the driving device 30 drives the probe module 20 to move a set distance Z2 along the third direction Z, so that the pressure-sensitive paper and the probe 21 are in contact with each other, and the pressure-sensitive paper generates an indentation under the pressure of the probe 21. If the indentation currently generated by the pressure-sensitive paper is close to the initial indentation, it means that the probe 21 and the pressure-sensitive paper are in good contact, and the probe 21 has not deformed or the deformation is small. If the indentation currently generated by the pressure-sensitive paper is obviously shallow, it means that the probe 21 and the pressure-sensitive paper are in poor contact, and the probe 21 is bent and deformed, and the deformation is large.

[0060] In other embodiments, the detection component 42 may also include a soft structure, which has a flat surface when not squeezed, and may be deformed and concave under the pressure of the probe 21, and the shape of the concave may reflect the pressure applied by the probe 21 to the soft structure, thereby further reflecting the degree of deformation of the probe 21. The shape of the concave includes the depth and shape of the concave.

[0061] Specifically, during the detection of the probe 21, if the current shape of the depression produced by the soft structure is close to the initial shape, it means that the contact between the probe 21 and the soft structure is good, and the probe 21 has not deformed or the deformation is small. If the current shape of the depression is very different from the initial shape, it means that the contact between the probe 21 and the soft structure is poor, the probe 21 is bent, and the deformation of the probe 21 is large. The method for obtaining the initial shape of the depression can refer to the method for obtaining the initial indentation mentioned above, and this application will not introduce it in detail.

[0062] In one embodiment, the detection component 42 includes a pressure sensor. During the detection of the probe 21, by comparing the pressure value currently measured by the pressure sensor with the initial pressure value, the contact condition between the pressure sensor and the probe 21 can be obtained more accurately, thereby further obtaining the deformation condition of the probe 21, thereby improving the detection accuracy.

[0063] Please continue to refer to Figure 3 and Figure 4 In one embodiment, the pressure detection device 40 further includes a display component 43, which is connected to the pressure sensor and is used to display the pressure detected by the pressure sensor. During the detection of the probe 21, the staff can view the pressure detected by each pressure sensor through the display component 43, so as to understand the deformation of the corresponding probe 21.

[0064] When the display component 43 is specifically set, in one embodiment, the display component 43 includes at least one display screen 431, and each display screen 431 is connected to multiple pressure sensors, so that the pressure values ​​detected by the multiple pressure sensors can be displayed. In another embodiment, the display component 43 includes multiple display screens 431, and the multiple display screens 431 correspond to the multiple pressure sensors included in the pressure detection device 40 one by one, and each display screen 431 is used to display the pressure value detected by the corresponding pressure sensor.

[0065] When the display assembly 43 is specifically installed, Figure 4 As shown, in one embodiment, the base 41 includes a bottom plate 411 and a surrounding frame 412 arranged on the periphery of the bottom plate 411, a plurality of detection components 42 included in the pressure detection device 40 are located in the surrounding frame 412, and the display component 43 is located on the surface of the surrounding frame 412 away from the plurality of detection components 42. In the above embodiment, by installing the display component 43 on the outer surface of the surrounding frame 412, on the one hand, the length of the cable between the display component 43 and the pressure sensor is shortened, which is convenient for wiring; on the other hand, the integration of the pressure detection device 40 is improved, and the space occupied by the pressure detection device 40 is reduced.

[0066] Please continue to refer to Figure 4In one embodiment, the frame 412 includes a first side wall 4121 and a second side wall 4122 that are opposite to each other, and the display assembly 43 includes a plurality of display screens 431, a portion of which is located on the first side wall 4121, and another portion of which is located on the second side wall 4122. The rack 10 has a first window on a side opposite to the first side wall 4121, and a second window on a side opposite to the second side wall 4122. The first window can expose the display screen 431 disposed on the first side wall 4121, and the second window can expose the display screen 431 disposed on the second side wall 4122, so that the staff can view the pressure value displayed on the display screen 431 from the outside of the equipment.

[0067] Figure 5 and Figure 6 They are schematic diagrams of installing the detection component on the base according to the embodiments of the present application, such as Figure 5 and Figure 6 As shown, in some embodiments, the multiple detection components 42 included in the pressure detection device 40 include a first detection component 421 and a second detection component 422, the base 41 has a first mounting surface 4101 and a second mounting surface 4102, the first detection component 421 is arranged on the first mounting surface 4101, and the second detection component 422 is arranged on the second mounting surface 4102. The first mounting surface 4101 and the second mounting surface 4102 may be located in the same plane, or the first mounting surface 4101 and the second mounting surface 4102 may also have a height difference.

[0068] In the above embodiments, the first detection component 421 and the second detection component 422 are any two of the multiple detection components 42 included in the pressure detection device 40. With the same reference plane as a reference, the above two detection components 42 can be located at the same height or at different heights.

[0069] Taking the plane where the bottom plate 411 is located as the reference plane, the height of the first detection component 421 and the second detection component 422 is related to the height of the ends of the two corresponding probes 21. In some embodiments, the probe 21 corresponding to the first detection component 421 is the first probe 211, and the probe 21 corresponding to the second detection component 422 is the second probe 212. Figure 5 As shown, when the end of the first probe 211 and the end of the second probe 212 are located at different heights, the first detection component 421 and the second detection component 422 are located at different heights, and the first mounting surface 4101 and the second mounting surface 4102 are also located at different heights. Figure 6As shown, when the end of the first probe 211 and the end of the second probe 212 are at the same height, the first detection assembly 421 and the second detection assembly 422 are at the same height, and the first mounting surface 4101 and the second mounting surface 4102 are also at the same height. The end of the first probe 211 refers to the end of the first probe 211 facing the pressure detection device 40, and the end of the second probe 212 refers to the end of the second probe 212 facing the pressure detection device 40.

[0070] In a specific embodiment, the first probe 211 is used to abut against the top surface of the positive pole of the square battery cell, and the second probe 212 is used to abut against the top surface of the negative pole of the square battery cell. The top surface of the positive pole is flush with the top surface of the negative pole. Taking the plane where the bottom plate 411 is located as the reference plane, the end of the first probe 211 and the end of the second probe 212 are at the same height. Accordingly, the first detection component 421 and the second detection component 422 are at the same height, and the first mounting surface 4101 and the second mounting surface 4102 are also at the same height.

[0071] In another embodiment, the first probe 211 is used to abut against the top surface of the pole of the square battery cell, and the second probe 212 is used to abut against the shell of the square battery cell to detect the temperature of the shell. The pole protrudes from the surface of the shell. Taking the plane where the bottom plate 411 is located as the reference plane, the end of the first probe 211 and the end of the second probe 212 are located at different heights. Accordingly, the first detection component 421 and the second detection component 422 are located at different heights, and the first mounting surface 4101 and the second mounting surface 4102 are also located at different heights.

[0072] When the base 41 is specifically configured, the base 41 includes a variety of structural forms. Figure 7 A schematic diagram of the structure of the base provided in the embodiment of the present application, such as Figure 7 As shown, in one embodiment, the base 41 includes a bottom plate 411 and a plurality of bosses 413 disposed on the surface of the bottom plate 411. The side surface of the boss 413 disposed away from the bottom plate 411 is a first surface 4131, and the first surface 4131 is parallel to the surface of the bottom plate 411. The first surface 4131 is provided with two protruding structures 4132, and the spacing between the two protruding structures 4132 is the same as the spacing between the positive electrode column and the negative electrode column.

[0073] When specifically arranging the first mounting surface 4101 and the second mounting surface 4102, the first mounting surface 4101 and the second mounting surface 4102 may be located on the first surface 4131 of the boss 413, or, the first mounting surface 4101 and the second mounting surface 4102 may also be located on the surfaces of two protruding structures 4132, or, still further, one of the first mounting surface 4101 and the second mounting surface 4102 may be located on the surface of the protruding structure 4132, and the other may be located on the first surface 4131.

[0074] The bottom plate 411 and the plurality of bosses 413 may be an integral structure, or may be fixed by welding, bonding, or by fasteners. The boss 413 may be a solid structure or a hollow structure. In the embodiment where the boss 413 is a hollow structure, a wire may be arranged inside the boss 413, and the wire is connected to the detection component 42.

[0075] Figure 8 Another structural schematic diagram of the base provided in the embodiment of the present application is as follows: Figure 8 As shown, in one embodiment, the base 41 includes a bottom plate 411 and a plurality of support columns 414 provided on the bottom plate 411, and the plurality of support columns 414 are arranged at intervals. For any two support columns 414, the heights of the two support columns 414 may be equal or unequal. Specifically, when the first mounting surface 4101 and the second mounting surface 4102 are arranged in the above-mentioned base 41, the first mounting surface 4101 and the second mounting surface 4102 may be located at the end surfaces of the two support columns 414 away from the bottom plate 411, or the first mounting surface 4101 and the second mounting surface 4102 may also be located on the surface of the bottom plate 411, or one of the first mounting surface 4101 and the second mounting surface 4102 may be located at the end surface of the support column 414 away from the bottom plate 411, and the other may be located on the surface of the bottom plate 411.

[0076] In one embodiment, the support column 414 corresponds to the detection component 42 one by one, and the detection component 42 is located at one end of the support column 414 away from the bottom plate 411. The support column 414 plays a positioning role, which can improve the installation accuracy of the detection component 42. In addition, in the scenario where the detection component 42 includes a pressure sensor, the support column 414 protrudes from the bottom plate 411 by a certain height, so that there is wiring space above the bottom plate 411, which is convenient for arranging wires above the bottom plate 411, so that the wires connect the pressure sensor and other devices.

[0077] For any two support columns 414, the structures of the two support columns 414 may be the same or different. In some embodiments, the multiple probes 21 included in the probe module 20 include a first probe 211 and a second probe 212, wherein the first probe 211 and the second probe 212 are of different types. For example, the first probe 211 is used to abut against the pole of the battery cell to be electrically connected to the pole. The second probe 212 is used to abut against the shell of the battery cell to detect the temperature of the shell. The multiple support columns 414 provided on the bottom plate 411 include a first support column 4141 and a second support column 4142, wherein the detection component 42 located at the first support column 4141 is used to abut against the first probe 211, thereby detecting the pressure applied by the first probe 211 to it, so as to obtain the deformation of the first probe 211; the detection component 42 located at the second support column 4142 is used to abut against the second probe 212, thereby detecting the pressure applied by the second probe 212 to it, so as to obtain the deformation of the second probe 212.

[0078] In order to distinguish the position of the detection component 42 corresponding to the first probe 211 and the position of the detection component 42 corresponding to the second probe 212 from the plurality of support columns 414, in one embodiment, the cross-sectional area of ​​the first support column 4141 is different from the cross-sectional area of ​​the second support column 4142. In other words, the thickness of the first support column 4141 is different from the thickness of the second support column 4142. For example, the cross-sectional area of ​​the first support column 4141 is greater than the cross-sectional area of ​​the second support column 4142. In this embodiment, the position of the detection component 42 corresponding to the first probe 211 and the position of the detection component 42 corresponding to the second probe 212 can be distinguished by the difference in thickness of the first support column 4141 and the second support column 4142.

[0079] In another embodiment, the cross-sectional shape of the first support column 4141 is different from the cross-sectional shape of the second support column 4142. For example, the first support column 4141 is a cylinder, and the second support column 4142 is a quadrangular prism. In this embodiment, the position of the detection component 42 corresponding to the first probe 211 and the position of the detection component 42 corresponding to the second probe 212 can be distinguished by the difference in shape between the first support column 4141 and the second support column 4142.

[0080] In some other embodiments, the height of the first support column 4141 is different from the height of the second support column 4142. The height difference between the first support column 4141 and the second support column 4142 can be used to distinguish the position of the detection component 42 corresponding to the first probe 211 and the position of the detection component 42 corresponding to the second probe 212.

[0081] When the support column 414 is specifically set, in one embodiment, the support column 414 is a retractable structure. In other words, the height of the support column 414 is adjustable. For any two support columns 414, the height difference between the two support columns 414 can be adjusted according to the height difference between the ends of the two probes 21 corresponding to the two support columns 414. In this way, the pressure detection device 40 can detect probe modules 20 of different specifications, thereby improving the flexibility of the pressure detection device 40 and expanding the scope of application.

[0082] When the above functions are implemented, in one implementation, the support column 414 includes two columns, and the ends of the two columns are threadedly connected. By rotating one of the columns, the height of the support column 414 can be adjusted, thereby realizing the telescopic function of the support column 414. In the above implementation, by making the two columns rotate relative to each other, relatively fine adjustment can be achieved.

[0083] In another implementation, the support column 414 includes a fixing pin and two hollow cylinders, wherein the two hollow cylinders are connected in a sleeve, and each hollow cylinder is provided with a plurality of positioning holes along the length direction. The fixing pin is inserted into a pair of positioning holes that overlap the above-mentioned two hollow cylinders, so that the above-mentioned two hollow cylinders are fixedly connected. During use, the height of the support column 414 can be adjusted by adjusting the position of the fixing pin, thereby realizing the telescopic function of the support column 414. Of course, the support column 414 can also realize the above-mentioned functions in other ways, which are not listed one by one in this application.

[0084] When the support columns 414 are specifically arranged, the arrangement of the support columns 414 is consistent with the arrangement of the probes 21 in the probe module 20 , so that the detection components 42 installed on different support columns 414 can abut against the corresponding probes 21 . Fig. 9 A schematic diagram of the arrangement of support columns provided in an embodiment of the present application is shown in FIG. Fig. 9 As shown, in one embodiment, a plurality of support columns 414 provided on the bottom plate 411 are arranged in a plurality of rows along a first direction X, and each row includes a plurality of support columns 414 arranged at intervals along a second direction Y. The first direction X and the second direction Y are perpendicular to each other and are parallel to the plane where the bottom plate 411 is located. A straight line extending along the second direction Y is taken as a reference line, and the distances from the centers of the plurality of support columns 414 in the same row to the reference line are equal.

[0085] For the support columns 414 in the same row, the structures of the support columns 414 in this row can be the same. Specifically, the cross-sectional shapes of the support columns 414 are the same, the cross-sectional areas are the same, and the heights are the same. Alternatively, the structures of the support columns 414 in the same row can also be different. For example, the support columns 414 in the same row include at least two support columns 414 with different cross-sectional areas.

[0086] The type of a group of probes 21 corresponding to the same row of support columns 414 can be the same. For example, a group of probes 21 corresponding to the same row of support columns 414 are respectively used to abut against the positive poles of different battery cells. Alternatively, the type of a group of probes 21 corresponding to the same row of support columns 414 can also be the same. For example, a plurality of probes 21 corresponding to a part of the support columns 414 are used to abut against the shells of different battery cells to detect the temperature of the shells; and a plurality of probes 21 corresponding to another part of the support columns 414 are used to communicate with the injection holes of the battery cells.

[0087] For two rows of support columns 414 adjacent to each other along the first direction X, the two rows of support columns 414 can be arranged in alignment or staggered. The structures of the two rows of support columns 414 can be the same or different. For example, the shapes of the cross sections of the two rows of support columns 414 are different. For another example, the cross-sectional areas of the two rows of support columns 414 are different. For another example, the heights of the two rows of support columns 414 are different. The types of the two groups of probes 21 corresponding to the two rows of support columns 414 are different. For example, a group of probes 21 corresponding to one row of support columns 414 are respectively used to abut against the positive poles of different battery cells, and a group of probes 21 corresponding to the other row of support columns 414 are respectively used to abut against the shells of different battery cells.

[0088] In one embodiment, the support column 414 is slidably connected to the bottom plate 411 along the first direction X. For two support columns 414 arranged adjacent to each other along the first direction X, the spacing between the two support columns 414 along the first direction X can be adjusted according to the spacing between two probes 21 arranged corresponding to the two support columns 414 along the first direction X. In this way, the pressure detection device 40 can detect probe modules 20 of different specifications, thereby improving the flexibility of the pressure detection device 40 and expanding the scope of application.

[0089] When the above functions are specifically implemented, in one implementation, a first slider is provided at the bottom of the support column 414, the first slider is slidably connected to the bottom plate 411, and a first locking structure is provided between the first slider and the bottom plate 411. Of course, the support column 414 can also achieve the function of being slidably connected to the bottom plate 411 along the first direction X in other ways, which are not listed one by one in this application.

[0090] In one embodiment, the support column 414 is slidably connected to the bottom plate 411 along the second direction Y. For two support columns 414 arranged adjacent to each other along the second direction Y, the spacing between the two support columns 414 along the second direction Y can be adjusted according to the spacing between two probes 21 arranged corresponding to the two support columns 414 along the second direction Y. In this way, the pressure detection device 40 can detect probe modules 20 of different specifications, thereby improving the flexibility of the pressure detection device 40 and expanding the scope of application.

[0091] When the above functions are implemented, in one implementation, a second slider is provided at the bottom of the support column 414, the second slider is slidably connected to the bottom plate 411, and a second locking structure is provided between the second slider and the bottom plate 411. Of course, the support column 414 can also achieve the function of being slidably connected to the bottom plate 411 along the second direction Y in other ways, which are not listed one by one in this application.

[0092] In one embodiment, the cross-sectional area of ​​the support column 414 is greater than or equal to the cross-sectional area of ​​the probe 21 , so that the support column 414 can provide stable support for the detection component 42 .

[0093] When the detection component 42 is installed on the support column 414, the detection component 42 can be glued to the end of the support column 414 away from the bottom plate 411, or welded to the end of the support column 414 away from the bottom plate 411. In order to improve the installation accuracy of the detection component 42, in one embodiment, the end of the support column 414 away from the bottom plate 411 has a groove, and the detection component 42 is located in the groove. The groove can position the detection component 42, thereby improving the installation accuracy of the detection component 42.

[0094] In order to improve the alignment accuracy of the pressure detection device 40 and the probe module 20, as shown in FIG. Figure 1 As shown, in one embodiment, a plurality of limit blocks 50 are provided in the accommodation space C of the rack 10. When the pressure detection device 40 is placed in the accommodation space C of the rack 10, the plurality of limit blocks 50 are located on the outer peripheral side of the base 41, thereby reducing the misalignment of the base 41 in the horizontal plane and improving the alignment accuracy of the base 41 and the probe module 20. In a specific embodiment, the base 41 includes a bottom plate 411 and a surrounding frame 412, the surrounding frame 412 is rectangular, and the plurality of limit blocks 50 are distributed on at least two sides of the surrounding frame 412.

[0095] The above-mentioned limit stopper 50 can realize rough positioning of the pressure detection device 40. In order to further improve the positioning accuracy of the base 41, in one embodiment, the frame 10 and the base 41 are also connected by a positioning pin. In specific implementation, the frame 10 and the base 41 are respectively provided with positioning holes, and the positioning pins are inserted into the positioning holes to realize the positioning of the frame 10 and the base 41.

[0096] like Fig.10As shown, in one embodiment, the chemical fractionation device further includes a tray 60, and the tray 60 is used to carry the battery cells. When the tray 60 is specifically set, the orthographic projection of the tray 60 along the third direction Z coincides with the orthographic projection of the base 41 along the third direction Z, so that after the tray 60 is placed in the accommodation space C of the rack 10, the above-mentioned limit stopper 50 can also roughly position the tray 60. Optionally, the orthographic projection of the tray 60 along the third direction Z and the orthographic projection of the base 41 along the vertical direction Z are both rectangular, and the length and width of the two are respectively the same.

[0097] In addition, the tray 60 and the frame 10 may also be connected via positioning pins to achieve precise positioning.

[0098] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A pressure detection device, characterized in that: A probe module for testing a chemical component capacity device; the probe module comprises a plurality of probes, and the plurality of probes are used to abut against the battery cell; The pressure detection device comprises a base and a plurality of detection components, wherein the plurality of detection components are arranged on the base; the detection components are used to abut against the probe and detect the pressure applied by the probe.

2. The pressure detection device according to claim 1, characterized in that: The base includes a bottom plate and a plurality of support columns arranged on the bottom plate. The plurality of support columns correspond to the plurality of detection components one by one, and the detection components are arranged at one end of the support column away from the bottom plate.

3. The pressure detection device according to claim 2, characterized in that: The support column is a retractable structure.

4. The pressure detection device according to claim 2, characterized in that: The plurality of support columns are arranged into a plurality of rows along a first direction, and each row includes a plurality of support columns arranged at intervals along a second direction; the first direction and the second direction are perpendicular to each other and are parallel to the plane where the bottom plate is located; The support column is slidably connected to the bottom plate along the first direction, and / or the support column is slidably connected to the bottom plate along the second direction.

5. The pressure detection device according to claim 2, characterized in that: The plurality of probes include a first probe and a second probe, and the first probe and the second probe are of different types; The plurality of support columns include a first support column and a second support column, the detection component located on the first support column is used to abut against the first probe, and the detection component located on the second support column is used to abut against the second probe; The cross-sectional area of ​​the first support column is different from the cross-sectional area of ​​the second support column; and / or, the shape of the cross section of the first support column is different from the shape of the cross section of the second support column; And / or, the height of the first support column is different from the height of the second support column.

6. The pressure detection device according to any one of claims 2 to 5, characterized in that: The cross-sectional area of ​​the support column is greater than or equal to the cross-sectional area of ​​the probe.

7. The pressure detection device according to any one of claims 2 to 5, characterized in that: One end of the support column away from the bottom plate has a groove, and the detection component is located in the groove.

8. The pressure detection device according to any one of claims 1 to 5, characterized in that: The detection component includes a pressure sensor or pressure-sensitive paper.

9. The pressure detection device according to claim 8, characterized in that: The detection component includes a pressure sensor; The pressure detection device also includes a display component, which is connected to the pressure sensor and is used to display the pressure value detected by the pressure sensor.

10. The pressure detection device according to claim 9, characterized in that: The base comprises a bottom plate and a surrounding frame arranged on the periphery of the bottom plate, the multiple detection components are located in the surrounding frame, and the display component is located on a surface of the surrounding frame away from the multiple detection components.

11. The pressure detection device according to any one of claims 1 to 5, characterized in that: The base has a first mounting surface and a second mounting surface, the first mounting surface and the second mounting surface are located in the same plane, or the first mounting surface and the second mounting surface have a height difference; The plurality of detection components include a first detection component and a second detection component, the first detection component is disposed on the first mounting surface, and the second detection component is disposed on the second mounting surface.

12. A chemical fractionation device, characterized in that: It comprises a frame, a probe module, a driving device and a pressure detection device as claimed in any one of claims 1 to 11; The probe module and the driving device are arranged on the frame, and the driving device is connected to the probe module and is used to drive the probe module to move along the third direction; The frame has a containing space, the containing space and the probe module are arranged along the third direction, and the containing space is used to contain the battery cell or the pressure detection device.

13. The chemical fractionation equipment according to claim 12, characterized in that: A plurality of limit blocks are arranged in the accommodation space. When the pressure detection device is placed in the accommodation space, the plurality of limit blocks are located on the outer peripheral side of the base.

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