Battery assembly device, sample vibration system and magnetic detection system

Abstract

An embodiment of the present application discloses a battery assembly device, a sample vibration system, and a magnetic detection system. The device includes: a first structure and a second structure; a first electrode groove is provided on the first structure, and the first electrode groove is used to accommodate a first electrode; a first electrode lead is further provided in the first structure, one end of the first electrode lead is used to connect to the first electrode, and the other end of the first electrode lead is used to extend out of the first structure; a second electrode groove is provided on the second structure, and the second electrode groove is used to accommodate a second electrode; a second electrode lead is further provided in the second structure, one end of the second electrode lead is used to connect to the second electrode, and the other end of the second electrode lead is used to extend out of the second structure; wherein, when the first structure and the second structure are assembled and connected, the first electrode groove and the second electrode groove form a sealed accommodation cavity. By adopting the technical solution provided by the embodiment of the present application, the magnetic change during the battery chemical reaction process can be detected in-situ, and the test accuracy can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of testing, and particularly to a battery assembly device, a sample vibration system, and a magnetic detection system. Background Art

[0002] In order to design high-performance batteries, various testing means are usually required to test the batteries, understand the mechanism of the electrochemical reaction process of the batteries, and then improve the performance of the batteries.

[0003] However, in the magnetic testing process, it is difficult for the existing battery testing methods to intuitively and real-time reflect the magnetic changes during the electrochemical reaction process, and the testing accuracy is relatively low. Summary of the Invention

[0004] Embodiments of the present application provide a battery assembly device, a sample vibration system, and a magnetic detection system, which are conducive to solving the problem that it is difficult to intuitively and real-time reflect the magnetic changes during the electrochemical reaction process and the testing accuracy is relatively low in the existing magnetic testing process.

[0005] In a first aspect, an embodiment of the present application provides a battery assembly device, including: a first structure body and a second structure body that match each other;

[0006] A first electrode groove is provided on the first structure body, and the first electrode groove is used to accommodate a first electrode; a first electrode lead is further provided in the first structure body, one end of the first electrode lead is used to connect the first electrode, and the other end of the first electrode lead is used to extend out of the first structure body;

[0007] A second electrode groove is provided on the second structure body, and the second electrode groove is used to accommodate a second electrode; a second electrode lead is further provided in the second structure body, one end of the second electrode lead is used to connect the second electrode, and the other end of the second electrode lead is used to extend out of the second structure body;

[0008] Wherein, when the first structure body and the second structure body are assembled and connected, the first electrode groove and the second electrode groove form a sealed accommodation cavity, and the accommodation cavity is further used to accommodate an electrolyte and a separator.

[0009] Preferably, it further includes a gasket and a spring piece, and the second electrode is used to be connected to the second electrode lead through the gasket and the spring piece in sequence.

[0010] Preferably, when the first structure body and the second structure body are assembled and connected, the assembly formed by the first structure body and the second structure body is a columnar structure, or one end of the assembly is a columnar structure.

[0011] Preferably, the first electrode lead and the second electrode lead extend from one end of the columnar structure.

[0012] Preferably, a battery insertion tube is further included. A cavity matching the columnar structure, as well as a first through hole and a second through hole matching the first electrode lead and the second electrode lead, are provided in the battery insertion tube;

[0013] The columnar structure is used to be inserted into the cavity of the battery insertion tube. When the columnar structure is inserted into the cavity of the battery insertion tube, the first electrode lead and the second electrode lead respectively extend out of the battery insertion tube in the first through hole and the second through hole.

[0014] Preferably, the columnar structure is a cylinder, and the battery insertion tube is a circular tube.

[0015] In a second aspect, an embodiment of the present application provides a sample vibration system, including a driving unit and a sample rod. The driving unit is used to drive the sample rod to reciprocate along the axial direction of the sample rod. A first wire and a second wire are provided in the sample rod. The first ends of the first wire and the second wire are used to connect to a current source, and the second ends of the first wire and the second wire are respectively used to connect to a first electrode and a second electrode of a battery to be tested.

[0016] Preferably, the battery to be tested is an assembled battery prepared by using the device according to any one of the first aspect. A cavity matching the assembled battery is provided at one end of the sample rod. The assembled battery is inserted into the sample rod and fixedly connected to the sample rod. When the assembled battery is inserted into the sample rod, the second ends of the first wire and the second wire of the sample rod assembly are respectively connected to the first electrode and the second electrode of the assembled battery.

[0017] Preferably, the battery to be tested is a soft-pack battery, and the second ends of the first wire and the second wire are respectively connected to the first electrode and the second electrode of the soft-pack battery.

[0018] In a third aspect, an embodiment of the present application provides a magnetic detection system, including: a current source, an electromagnet system, the sample vibration system according to any one of the second aspect, and a signal detection system;

[0019] The current source is used to connect to the first ends of the first wire and the second wire in the sample rod, so as to control the charging and / or discharging of the battery to be tested;

[0020] The electromagnet system is used to provide a magnetic field;

[0021] The sample vibration system is used to drive the sample rod to drive the battery to be tested to vibrate in the magnetic field;

[0022] The signal detection system is used to detect the magnetism of the battery to be tested during the charging and / or discharging process of the battery to be tested.

[0023] By adopting the technical solution provided by the embodiment of the present application, the magnetic change during the battery chemical reaction process can be detected in situ, and the test accuracy can be improved. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, other drawings can also be obtained based on these drawings without creative efforts.

[0025] Figure 1 It is a schematic structural diagram of a battery assembly device provided by an embodiment of the present application;

[0026] Figure 2 It is a schematic structural diagram of another battery assembly device provided by an embodiment of the present application;

[0027] Figure 3 It is a schematic structural diagram of a magnetic detection system provided by an embodiment of the present application;

[0028] The symbols in the figure are represented as: 101 - the first structure, 102 - the second structure, 103 - the first electrode groove, 104 - the second electrode groove, 105 - the first electrode lead, 106 - the second electrode lead, 107 - the gasket, 108 - the spring piece, 109 - the sealing ring, 201 - the battery insertion tube, 202 - the first through hole, 203 - the second through hole, 310 - the current source, 320 - the electromagnet system, 330 - the sample vibration system, 331 - the driving unit, 332 - the sample rod, 3321 - the first wire, 3322 - the second wire, 333 - the battery under test, 340 - the signal detection system. Detailed Embodiments

[0029] In order to enable those skilled in the art to better understand the technical solutions in the present application, the following will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0030] In view of the problems in the prior art that it is difficult to intuitively and real-time reflect the magnetic changes during the electrochemical reaction process during the magnetic test, and the test accuracy is relatively low, the embodiments of the present application provide a battery assembly device, a sample vibration system and a magnetic detection system, which will be described in detail below with reference to the accompanying drawings.

[0031] See Figure 1 , which is a schematic structural diagram of a battery assembly device provided by an embodiment of the present application. As Figure 1 shown, the battery assembly device includes a matching first structure body 101 and a second structure body 102; a first electrode groove 103 is provided on the first structure body 101, and the first electrode groove 103 is used to accommodate a first electrode; a first electrode lead 105 is further provided inside the first structure body 101, one end of the first electrode lead 105 is used to connect to the first electrode, and the other end of the first electrode lead 105 is used to extend out of the first structure body 101; a second electrode groove 104 is provided on the second structure body 102, and the second electrode groove 104 is used to accommodate a second electrode; a second electrode lead 106 is further provided inside the second structure body 102, one end of the second electrode lead 106 is used to connect to the second electrode, and the other end of the second electrode lead 106 is used to extend out of the second structure body 102; wherein, when the first structure body 101 and the second structure body 102 are assembled and connected, the first electrode groove 103 and the second electrode groove 104 form a sealed accommodation cavity, and the accommodation cavity is also used to accommodate an electrolyte and a separator.

[0032] In addition, screw holes are provided on the first structure body 101 and the second structure body 102. When the first structure body 101 and the second structure body 102 are assembled and connected, the first structure body 101 and the second structure body 102 can be fixedly connected by screws passing through the screw holes.

[0033] In order to improve the sealing performance of the accommodation cavity formed by the first electrode groove 103 and the second electrode groove 104, sealing rings 109 are further provided on the outer edges of the first electrode groove 103 and the second electrode groove 104.

[0034] In some possible implementation manners, the battery assembly device further includes a gasket 107 and a spring piece 108, and the second electrode is used to be connected to the second electrode lead 106 through the gasket 107 and the spring piece 108 in sequence. The gasket 107 and the spring piece 108 can be made of stainless steel material. Of course, the embodiments of the present application do not make specific limitations on this.

[0035] In some possible implementation manners, when the first structure body 101 and the second structure body 102 are assembled and connected, the assembled body formed by the first structure body 101 and the second structure body 102 is a columnar structure, or one end of the assembled body is a columnar structure. The first electrode lead 105 and the second electrode lead 106 extend out of one end of the columnar structure, which is convenient for connecting to other modules to charge or discharge the battery assembled by the battery assembly device.

[0036] See Figure 2 , which is a schematic structural diagram of another battery assembly device provided by an embodiment of the present application. As Figure 2 shown, on the basis of the embodiment shown in Figure 1 , it further includes a battery insertion tube 201. A cavity matching the columnar structure is provided in the battery insertion tube 201, as well as a first through hole 202 and a second through hole 203 matching the first electrode lead 105 and the second electrode lead 106. The columnar structure of the assembly composed of the first structure body 101 and the second structure body 102 is used to be inserted into the cavity of the battery insertion tube 201. When the columnar structure is inserted into the cavity of the battery insertion tube 201, the first electrode lead 105 and the second electrode lead 106 respectively extend out of the battery insertion tube 201 in the first through hole 202 and the second through hole 203.

[0037] In some possible implementation manners, the columnar structure is a cylinder, and the battery insertion tube 201 is a circular tube. Of course, those skilled in the art can set the columnar structure and the battery insertion tube 201 to other shapes that match according to actual needs. For example, the columnar structure is set as a square column, and the battery insertion tube 201 is set as a matching square tube. Or, it can also be set to other shapes, and the embodiments of the present application do not make specific limitations thereto.

[0038] To facilitate those skilled in the art to better understand the technical solution provided by the embodiment of the present application, the following takes a lithium-ion battery as an example to illustrate the use process of the battery assembly device. It mainly includes the following steps.

[0039] Step S101: Place the first electrode of the lithium-ion battery in the first electrode groove 103, and then sequentially place the separator, the second electrode, the gasket 107, and the elastic piece 108.

[0040] Step S102: Place the electrolyte in the second electrode groove 104, buckle the first electrode groove 103 on the second electrode groove 104, pay attention to ensure that the two sealing rings 109 of the first electrode groove 103 and the second electrode groove 104 are aligned, and then fix the first structure body 101 and the second structure body 102 with screws. To further increase the battery sealing performance, silicone can be evenly applied around the rubber ring.

[0041] Step S103: Insert the assembled assembly into the battery insertion tube 201. At this time, the first electrode lead and the second electrode lead respectively extend out of the battery insertion tube 201 in the first through hole 202 and the second through hole 203.

[0042] Corresponding to the above battery assembly device, the embodiment of the present application further provides a magnetic detection system, which can detect the magnetic change in the battery chemical reaction process in real time in situ. The following will be described in detail with reference to the accompanying drawings.

[0043] See Figure 3 , which is a schematic structural diagram of a magnetic detection system provided by an embodiment of the present application. As Figure 3 shown, the magnetic detection system includes: a current source 310, an electromagnet system 320, a sample vibration system 330, and a signal detection system 340.

[0044] Among them, the current source 310 is used to connect the first ends of the first wire 3321 and the second wire 3322 in the sample rod, and further control the charging and / or discharging of the battery under test 333; the electromagnet system 320 is used to provide a magnetic field; the sample vibration system 330 is used to drive the sample rod to drive the battery under test 333 to vibrate in the magnetic field; the signal detection system 340 is used to detect the magnetism of the battery under test 333 during the charging and / or discharging process of the battery under test 333.

[0045] Specifically, the magnetic detection system provided by the embodiment of the present application can be implemented based on a Vibrating Sample Magnetometer (VSM). The specific working principles of the electromagnet system 320 and the signal detection system 340 can refer to VSM, and will not be elaborated in this embodiment of the present application. Next, the sample vibration system 330 in the magnetic detection system will be described in detail.

[0046] The sample vibration system 330 provided by the embodiment of the present application includes a driving unit 331 and a sample rod 332. The driving unit 331 is used to drive the sample rod 332 to reciprocate along the axial direction of the sample rod 332. The sample rod 332 is provided with a first wire 3321 and a second wire 3322. The first ends of the first wire 3321 and the second wire 3322 are used to connect the current source 310, and the second ends of the first wire 3321 and the second wire 3322 are respectively used to connect the first electrode and the second electrode of the battery under test 333.

[0047] In some possible implementation manners, the battery under test 333 is an assembled battery prepared by a device of Figure 1 or Figure 2 . One end of the sample rod 332 is provided with a cavity matching the assembled battery. The assembled battery is inserted into the sample rod 332 and fixedly connected to the sample rod 332. When the assembled battery is inserted into the sample rod 332, the second ends of the first wire 3321 and the second wire 3322 of the sample rod 332 assembly are respectively connected to the first electrode and the second electrode of the assembled battery.

[0048] To facilitate those skilled in the art to better understand the technical solutions provided by the embodiments of the present application, the test process of the magnetic detection system will be described below. It mainly includes the following steps.

[0049] Step S201: Using Figure 1 and / or Figure 2Insert the tested battery 333 of the described device organization into the sample rod 332, place the sample rod 332 into the cavity of the electromagnet system 320, and place it under a constant magnetic field;

[0050] Step S202: Connect the first wire 3321 and the second wire 3322 in the sample rod 332 to the current source 310 respectively;

[0051] Step S203: Control the tested battery 333 to perform reversible charge and discharge within a certain voltage range through the current source 310, collect electrochemical signals through the signal detection system 340, ensure that the magnetic test and the electrochemical test are started simultaneously, and collect magnetic signals and electrochemical signals in real-time and synchronously.

[0052] In some possible implementation manners, the tested battery 333 can also be a soft-pack battery, and the second ends of the first wire 3321 and the second wire 3322 are respectively connected to the first electrode and the second electrode of the soft-pack battery.

[0053] It should be noted that the battery assembly device, the sample vibration system, and the magnetic detection system provided in the embodiments of the present application are applicable not only to ion batteries but also to other types of batteries. The embodiments of the present application will not elaborate on this.

[0054] By adopting the technical solution provided in the embodiments of the present application, the magnetic change during the battery chemical reaction process can be detected in-situ, and the test accuracy can be improved.

[0055] It should be noted that in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements but also includes other elements not explicitly listed, or also includes elements inherent to this process, method, article or device. Without further limitations, an element defined by the statement "including a..." does not exclude the existence of additional identical elements in the process, method, article or device including the element.

[0056] The above are only specific implementation manners of the present invention, enabling those skilled in the art to understand or implement the present invention. Various modifications to these embodiments will be obvious to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0057] For the same or similar parts among the various embodiments in this specification, reference can be made to each other. In particular, for the terminal embodiments, since they are basically similar to the method embodiments, the description is relatively simple, and for the relevant parts, reference can be made to the descriptions in the method embodiments.

[0058] The embodiments of the present application described above do not constitute a limitation on the protection scope of the present application.

Claims

1. A battery assembly device, characterized in that, The battery assembly device is used for in-situ detecting magnetic changes during the chemical reaction process of a battery. The battery assembly device includes: a first structure body and a second structure body that match each other; A first electrode groove is provided on the first structure body. The first electrode groove is used for accommodating a first electrode. A first electrode lead is further provided inside the first structure body. One end of the first electrode lead is used for connecting the first electrode, and the other end of the first electrode lead is used for extending out of the first structure body; A second electrode groove is provided on the second structure body. The second electrode groove is used for accommodating a second electrode. A second electrode lead is further provided inside the second structure body. One end of the second electrode lead is used for connecting the second electrode, and the other end of the second electrode lead is used for extending out of the second structure body; Wherein, when the first structure body and the second structure body are assembled and connected, the first electrode groove and the second electrode groove form a sealed accommodating cavity. The accommodating cavity is further used for accommodating an electrolyte and a separator. The separator is used for being arranged between the first electrode and the second electrode; When the first structure body and the second structure body are assembled and connected, the assembly formed by the first structure body and the second structure body is a columnar structure, or one end of the assembly is a columnar structure. The columnar structure is a cylinder; The arrangement directions of the first electrode, the separator, and the second electrode are perpendicular to the axis of the cylinder.

2. The device according to claim 1, wherein It further includes a gasket and a shrapnel. The second electrode is used for being connected to the second electrode lead through the gasket and the shrapnel in sequence.

3. The device according to claim 1, characterized in that, One ends of the first electrode lead and the second electrode lead extend out of the columnar structure.

4. The device according to claim 3, characterized in that, It further includes a battery insertion tube. A cavity matching the columnar structure, a first through hole and a second through hole matching the first electrode lead and the second electrode lead are provided inside the battery insertion tube; The columnar structure is used for being inserted into the cavity of the battery insertion tube. When the columnar structure is inserted into the cavity of the battery insertion tube, the first electrode lead and the second electrode lead respectively extend out of the battery insertion tube in the first through hole and the second through hole.

5. The device according to claim 4, characterized in that, The battery insertion tube is a round tube.

6. A sample vibration system, characterized in that, It includes a driving unit and a sample rod. The driving unit is used for driving the sample rod to reciprocate along the axial direction of the sample rod. A first wire and a second wire are provided inside the sample rod. The first ends of the first wire and the second wire are used for connecting a current source, and the second ends of the first wire and the second wire are respectively used for connecting the first electrode and the second electrode of the battery to be tested. The battery to be tested is a battery assembled by using the battery assembly device according to any one of claims 1-5.

7. The system according to claim 6, characterized in that, One end of the sample rod is provided with a cavity matching the assembled battery. The assembled battery is inserted into the sample rod and fixedly connected to the sample rod. And when the assembled battery is inserted into the sample rod, the second ends of the first wire and the second wire of the sample rod assembly are respectively connected to the first electrode and the second electrode of the assembled battery.

8. A magnetic detection system, characterized in that, It includes: A current source, an electromagnet system, the sample vibration system according to any one of claims 6-7, and a signal detection system; The current source is used to connect the first ends of the first wire and the second wire inside the sample rod, so as to control the charging and / or discharging of the battery under test; The electromagnet system is used to provide a magnetic field; The sample vibration system is used to drive the sample rod to drive the battery under test to vibrate in the magnetic field; The signal detection system is used to detect the magnetism of the battery under test during the charging and / or discharging process of the battery under test.

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