Battery assembly device, sample vibration system and magnetic detection system

Abstract

The embodiment of the invention discloses a battery assembly device, a sample vibration system and a magnetic detection system. The device comprises a first structural body and a second structural body, a first electrode groove is formed in the first structural body, and the first electrode groove is used for accommodating a first electrode; a first electrode lead is further arranged in the first structural body, one end of the first electrode lead is used for being connected with the first electrode, and the other end of the first electrode lead extends out of the first structural body; a second electrode groove is formed in the second structural body and is used for accommodating a second electrode; a second electrode lead is further arranged in the second structural body, one end of the second electrode lead is used for being connected with the second electrode, and the other end of the second electrode lead extends out of the second structural body; when the first structural body and the second structural body are assembled and connected, the first electrode groove and the second electrode groove form a closed containing cavity. By adopting the technical scheme provided by the embodiment of the invention, the magnetic change in the chemical reaction process of the battery can be detected in situ, and the test precision is improved.

Description

[0001] This application is a divisional application of the Chinese patent application submitted to the State Intellectual Property Office on July 9, 2021, with application number 202110777320.8 and invention name "Battery assembly device, sample vibration system and magnetic detection system", all of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of testing technology, and in particular to a battery assembly device, a sample vibration system, and a magnetic detection system. Background Art

[0003] In order to design high-performance batteries, it is usually necessary to test the batteries through various testing methods to understand the mechanism of the battery's electrochemical reaction process, and then improve the batteries to enhance their performance.

[0004] However, during the magnetic testing process, the battery testing methods in the prior art are difficult to intuitively and real-time reflect the magnetic changes during the electrochemical reaction process, and the testing accuracy is low. Summary of the Invention

[0005] The embodiments of the present application provide a battery assembly device, a sample vibration system, and a magnetic detection system to help solve the problem in the prior art of magnetic testing that it is difficult to intuitively and in real time reflect the magnetic changes during the electrochemical reaction process, resulting in low test accuracy.

[0006] In a first aspect, an embodiment of the present application provides a battery assembly device, comprising: a first structure and a second structure that match;

[0007] The first structure is provided with a first electrode groove, the first electrode groove is used to accommodate the first electrode; the first structure is also provided with a first electrode lead, 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;

[0008] The second structure is provided with a second electrode groove, the second electrode groove is used to accommodate the second electrode; the second structure is also provided with a second electrode lead, 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;

[0009] When the first structure and the second structure are assembled and connected, the first electrode slot and the second electrode slot form a sealed accommodating cavity, and the accommodating cavity is also used to accommodate electrolyte and diaphragm.

[0010] Preferably, it further comprises a gasket and a spring, and the second electrode is used to be connected to the second electrode lead through the gasket and the spring in sequence.

[0011] Preferably, when the first structure and the second structure are assembled and connected, the assembly formed by the first structure and the second structure is a columnar structure, or one end of the assembly is a columnar structure.

[0012] Preferably, the first electrode lead and the second electrode lead extend out of one end of the columnar structure.

[0013] Preferably, it further comprises a battery insert, wherein the battery insert is provided with a cavity matching the columnar structure, and a first through hole and a second through hole matching the first electrode lead and the second electrode lead;

[0014] The columnar structure is used to be inserted into the cavity of the battery insert. When the columnar structure is inserted into the cavity of the battery insert, the first electrode lead and the second electrode lead extend out of the battery insert in the first through hole and the second through hole respectively.

[0015] Preferably, the columnar structure is a cylinder, and the battery insert is a circular tube.

[0016] In a second aspect, an embodiment of the present application provides a sample vibration system, comprising a driving unit and a sample rod, wherein the driving unit is used to drive the sample rod to reciprocate along the axial direction of the sample rod, and a first wire and a second wire are provided in the sample rod, wherein 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.

[0017] Preferably, the battery to be tested is an assembled battery prepared by the device described in any one of the first aspects, 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.

[0018] Preferably, the battery under test is a soft-pack battery, and the second ends of the first lead and the second lead are connected to the first electrode and the second electrode of the soft-pack battery, respectively.

[0019] In a third aspect, an embodiment of the present application provides a magnetic detection system, comprising: a current source, an electromagnet system, the sample vibration system according to any one of the second aspects, and a signal detection system;

[0020] The current source is used to connect the first ends of the first wire and the second wire in the sample rod, thereby controlling the charging and / or discharging of the battery to be tested;

[0021] The electromagnet system is used to provide a magnetic field;

[0022] The sample vibration system is used to drive the sample rod to drive the battery to be tested to vibrate in the magnetic field;

[0023] 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.

[0024] By adopting the technical solution provided in the embodiments of the present application, magnetic changes during the chemical reaction of the battery can be detected in situ, thereby improving the test accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0026] Figure 1 A schematic structural diagram of a battery assembly device provided in an embodiment of the present application;

[0027] Figure 2 A schematic structural diagram of another battery assembly device provided in an embodiment of the present application;

[0028] Figure 3 A schematic structural diagram of a magnetic detection system provided in an embodiment of the present application;

[0029] The symbols in the figure are: 101-first structure, 102-second structure, 103-first electrode groove, 104-second electrode groove, 105-first electrode lead, 106-second electrode lead, 107-gasket, 108-spring, 109-sealing ring, 110-screw hole, 201-battery insert, 202-first through hole, 203-second through hole, 310-current source, 320-electromagnet system, 330-sample vibration system, 331-driving unit, 332-sample rod, 3321-first wire, 3322-second wire, 333-tested battery, 340-signal detection system. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solutions in this application, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of this application.

[0031] In view of the problem in the prior art that it is difficult to intuitively and in real time reflect the magnetic changes during the electrochemical reaction during magnetic testing, and the test accuracy is low, the embodiments of the present application provide a battery assembly device, a sample vibration system and a magnetic detection system, which are described in detail below with reference to the accompanying drawings.

[0032] See also Figure 1 , is a schematic diagram of the structure of a battery assembly device provided in an embodiment of the present application. Figure 1 As shown, the battery assembly device includes a matching first structure 101 and a second structure 102; a first electrode groove 103 is provided on the first structure 101, and the first electrode groove 103 is used to accommodate the first electrode; a first electrode lead 105 is also provided in the first structure 101, one end of the first electrode lead 105 is used to connect the first electrode, and the other end of the first electrode lead 105 is used to extend out of the first structure 101; a second electrode groove 104 is provided on the second structure 102, and the second electrode groove 104 is used to accommodate the second electrode; a second electrode lead 106 is also provided in the second structure 102, one end of the second electrode lead 106 is used to connect the second electrode, and the other end of the second electrode lead 106 is used to extend out of the second structure 102; wherein, when the first structure 101 and the second structure 102 are assembled and connected, the first electrode groove 103 and the second electrode groove 104 form a closed accommodating cavity, and the accommodating cavity is also used to accommodate electrolyte and diaphragm.

[0033] In addition, screw holes 110 are provided on the first structure 101 and the second structure 102 . When the first structure 101 and the second structure 102 are assembled and connected, screws can be passed through the screw holes 110 to fix the first structure 101 and the second structure 102 together.

[0034] In order to improve the sealing performance of the accommodating cavity formed by the first electrode groove 103 and the second electrode groove 104 , a sealing ring 109 is further provided at the outer edge of the first electrode groove 103 and the second electrode groove 104 .

[0035] In some possible implementations, the battery assembly device further includes a gasket 107 and a spring 108, and the second electrode is connected to the second electrode lead 106 via the gasket 107 and the spring 108. The gasket 107 and the spring 108 can be made of stainless steel, which is not specifically limited in this embodiment of the present application.

[0036] In some possible implementations, when the first structure 101 and the second structure 102 are assembled and connected, the assembly formed by the first structure 101 and the second structure 102 is a columnar structure, or one end of the assembly is a columnar structure. The first electrode lead 105 and the second electrode lead 106 extend from one end of the columnar structure to facilitate connection with other modules to charge or discharge the battery assembled in the battery assembly device.

[0037] See also Figure 2 , is a schematic diagram of the structure of another battery assembly device provided in an embodiment of the present application. Figure 2 As shown, it is Figure 1 The illustrated embodiment further includes a battery insert 201, which has a cavity configured to accommodate the columnar structure, as well as first and second through-holes 202, 203 configured to accommodate the first and second electrode leads 105, 106. The columnar structure of the assembly consisting of the first and second structures 101, 102 is configured to be inserted into the cavity of the battery insert 201. When the columnar structure is inserted into the cavity of the battery insert 201, the first and second electrode leads 105, 106 extend out of the battery insert 201 within the first and second through-holes 202, 203, respectively.

[0038] In some possible implementations, the columnar structure is a cylinder, and the battery insert 201 is a round tube. Of course, those skilled in the art can configure the columnar structure and battery insert 201 to other matching shapes based on actual needs. For example, the columnar structure can be configured as a square column, and the battery insert 201 can be configured as a matching square tube. Alternatively, other shapes are possible, and this embodiment of the application does not impose specific limitations on this.

[0039] In order to facilitate those skilled in the art to better understand the technical solutions provided in the embodiments of the present application, the following describes the use of the battery assembly device using a lithium-ion battery as an example.

[0040] Step S101: placing the first electrode of the lithium-ion battery in the first electrode tank 103, and then placing the separator, the second electrode, the gasket 107 and the spring 108 in sequence.

[0041] Step S102: Place electrolyte in the second electrode tank 104, buckle the first electrode tank 103 onto the second electrode tank 104, and ensure that the two sealing rings 109 of the first electrode tank 103 and the second electrode tank 104 are aligned. Then, screw the first structure 101 and the second structure 102 together. To further improve the sealing of the battery, apply silicone gel evenly around the rubber rings.

[0042] Step S103 : inserting the assembled body into the battery insert 201 . At this time, the first electrode lead and the second electrode lead extend out of the battery insert 201 in the first through hole 202 and the second through hole 203 , respectively.

[0043] Corresponding to the above-mentioned battery assembly device, the present embodiment further provides a magnetic detection system that can detect magnetic changes during a battery chemical reaction in real time and in situ. Detailed description is provided below with reference to the accompanying drawings.

[0044] See also Figure 3 , is a structural diagram of a magnetic detection system provided in an embodiment of the present application. Figure 3 As 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 .

[0045] Among them, the current source 310 is used to connect the first end of the first wire 3321 and the first end of the second wire 3322 in the sample rod, thereby controlling the charging and / or discharging of the tested battery 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 tested battery 333 to vibrate in the magnetic field; the signal detection system 340 is used to detect the magnetism of the tested battery 333 during the charging and / or discharging process of the tested battery 333.

[0046] Specifically, the magnetic detection system provided in 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 be referred to the VSM and will not be described in detail in the embodiment of the present application. Below, the sample vibration system 330 in the magnetic detection system is described in detail.

[0047] The sample vibration system 330 provided in 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. A first wire 3321 and a second wire 3322 are provided in the sample rod 332. The first ends of the first wire 3321 and the second wire 3322 are used to connect to the current source 310, and the second ends of the first wire 3321 and the second wire 3322 are used to connect to the first electrode and the second electrode of the battery 333 under test, respectively.

[0048] In some possible implementations, the tested battery 333 is Figure 1 or Figure 2 An assembled battery is prepared by a device, 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, and 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.

[0049] In order to facilitate those skilled in the art to better understand the technical solutions provided by the embodiments of the present application, the testing process of the magnetic detection system is described below, which mainly includes the following steps.

[0050] Step S201: Use Figure 1 and / or Figure 2 The battery 333 to be tested organized in the device is inserted into the sample rod 332, and the sample rod 332 is placed in the cavity of the electromagnet system 320 and placed under a constant magnetic field;

[0051] Step S202: Connect the first wire 3321 and the second wire 3322 in the sample holder 332 to the current source 310 respectively;

[0052] Step S203: The tested battery 333 is controlled to reversibly charge and discharge within a certain voltage range by the current source 310, and the electrochemical signal is collected by the signal detection system 340 to ensure that the magnetic test and the electrochemical test are started at the same time, and the magnetic signal and the electrochemical signal are collected synchronously in real time.

[0053] In some possible implementations, the tested battery 333 may 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.

[0054] It should be noted that the battery assembly device, sample vibration system and magnetic detection system provided in the embodiments of the present application are not only applicable to ion batteries, but also to other types of batteries, which will not be described in detail in the embodiments of the present application.

[0055] By adopting the technical solution provided in the embodiments of the present application, magnetic changes during the chemical reaction of the battery can be detected in situ, thereby improving the test accuracy.

[0056] It should be noted that, in this document, relational terms such as "first" and "second" are used only 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 terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or device comprising the element.

[0057] The foregoing description is intended only to provide specific embodiments of the present invention, which will enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but is to be embodied in the widest possible manner consistent with the principles and novel features disclosed herein.

[0058] In this specification, the same or similar parts between the various embodiments can be referred to each other. In particular, for the terminal embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the description in the method embodiment.

[0059] The above-described embodiments of the present application do not constitute a limitation on the scope of protection of the present application.

Claims

1. A battery assembly device, characterized in that: include: a first structure and a second structure that match; A first electrode groove is provided on the first structure, and a first electrode lead is also provided in the first structure; A second electrode groove is provided on the second structure, and a second electrode lead is also provided in the second structure; When the first structure and the second structure are assembled and connected, the first electrode slot and the second electrode slot form a closed accommodating cavity. The assembly formed by the first structure and the second structure is a columnar structure, or one end of the assembly is a columnar structure. The accommodating cavity is used to accommodate the first electrode, the diaphragm, the second electrode and the electrolyte. 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; 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.

2. The device according to claim 1, characterized in that It also includes a gasket and a spring, and the second electrode is used to be connected to the second electrode lead through the gasket and the spring in sequence.

3. The device according to claim 2, characterized in that The first electrode lead and the second electrode lead extend out of one end of the columnar structure.

4. The device according to claim 3, characterized in that Also included is a battery insert, wherein the battery insert is provided with a cavity matching the columnar structure, and a first through hole and a second through hole matching the first electrode lead and the second electrode lead; The columnar structure is used to be inserted into the cavity of the battery insert. When the columnar structure is inserted into the cavity of the battery insert, the first electrode lead and the second electrode lead extend out of the battery insert in the first through hole and the second through hole respectively.

5. The device according to claim 4, characterized in that The columnar structure is a cylinder, and the battery insert is a round tube.

6. A sample vibration system, characterized in that: The device comprises a driving unit and a sample rod, wherein the driving unit is used to drive the sample rod to reciprocate along the axial direction of the sample rod, and a first wire and a second wire are provided in the sample rod, wherein 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 used to connect to a first electrode and a second electrode of a battery under test, respectively.

7. The system according to claim 6, characterized in that The battery under test is an assembled battery prepared using the device described in any one of claims 1 to 5, 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. The system according to claim 6, wherein: The battery under test is a soft-pack battery, and the second ends of the first lead and the second lead are connected to the first electrode and the second electrode of the soft-pack battery, respectively.

9. A magnetic detection system, characterized in that: include: A current source, an electromagnet system, a sample vibration system according to any one of claims 6 to 8, and a signal detection system; The current source is used to connect the first ends of the first wire and the second wire in the sample rod, thereby controlling the charging and / or discharging of the battery to be tested; 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 to be tested to vibrate in the magnetic field; 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.

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