Low-resistance three-electrode battery

Abstract

The utility model discloses a low-resistance three-electrode battery which comprises a shell, a battery cell and an electrode assembly, a filling cavity is formed in the shell, electrode liquid is filled in the filling cavity, the shell is in a square shape, an inclined plane is arranged at a vertex angle of the shell, and the inclined plane is connected with two adjacent side surfaces of the shell; the battery cell is arranged on one side, far away from the inclined surface, of the filling cavity and immersed in the electrode liquid; the electrode assembly comprises a first electrode and two second electrodes, the first electrode is installed on the inclined plane, the two second electrodes are installed on one side face in a spaced mode and located on the side, close to the battery cell, of the shell, and the polarities of the two second electrodes are opposite; and the first electrode and the two second electrodes form a complete path with the battery cell through the electrode liquid. The inclined plane is arranged at one corner, close to one side of the two second electrodes, of the three-electrode battery shell, and the first electrode is additionally arranged on the inclined plane, so that the effective electrode area of the battery is increased, the battery resistance is reduced, and the battery efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of batteries, in particular to a low-resistance three-electrode battery. Background Art

[0002] To eliminate errors in electrode potential caused by polarization current in a two-electrode system, a reference electrode can be introduced to stabilize the working electrode in a conventional two-electrode system. In existing three-electrode batteries, the third electrode is typically placed between the positive and negative electrodes, which has an inert effect on the battery's electrochemical reactions, increases battery resistance, and affects battery efficiency. Utility Model Content

[0003] The main purpose of the utility model is to provide a low-resistance three-electrode battery, aiming to solve the problem that the battery resistance of the above-mentioned three-electrode battery is too large and affects the battery efficiency.

[0004] To achieve the above objectives, the present application proposes a low-resistance three-electrode battery, comprising: a housing, the housing forming a filling cavity, the filling cavity being filled with an electrode liquid, the housing being in a square shape, and having an inclined surface at a top corner of the housing, the inclined surface connecting two adjacent side surfaces of the housing;

[0005] a battery cell, the battery cell being disposed on a side of the filling cavity away from the inclined surface and immersed in the electrode liquid; and

[0006] An electrode assembly, the electrode assembly comprising a first electrode and two second electrodes, the first electrode being installed on the inclined surface, the two second electrodes being installed at intervals on one of the side surfaces and located on the side of the shell close to the battery cell, the two second electrodes having opposite polarities, and the first electrode and the two second electrodes forming a complete passage with the battery cell through the electrode liquid.

[0007] Optionally, the angle between the inclined surface and an adjacent side surface is 120°-150°.

[0008] Optionally, the first electrode includes a first pole ear portion and a first burr portion, the first burr portion is formed on one circumferential side of the electrode, the first burr portion is arranged in the filling cavity, and the other end of the first pole ear portion passes through the inclined surface and is exposed in the shell.

[0009] Optionally, a reference electrode is provided around the outer periphery of the first burr portion, and the reference electrode is immersed in the electrode liquid to form a complete passage with the battery cell.

[0010] Optionally, the reference electrode occupies 1 / 2-2 / 3 of the first burr portion in the length direction of the first electrode ear portion.

[0011] Optionally, the reference electrode is one of a lithium electrode, a nickel electrode or a copper-plated nickel electrode.

[0012] Optionally, a tab glue is provided on the peripheral side of the first tab portion, a first mounting portion is provided on the inclined surface, and the tab glue abuts against the first mounting portion.

[0013] Optionally, two second mounting portions are provided on a side surface of the shell close to the battery core, and one end of a second electrode is passed through a second mounting portion.

[0014] Optionally, each of the second electrodes includes a second pole ear portion and a second burr portion, the second burr portion is formed on the peripheral side of one end of the second pole ear portion, the second burr portion is arranged in the filling cavity and is spaced apart from the battery cell, and the other end of the second pole ear portion passes through the side surface and is exposed in the shell.

[0015] Optionally, the tab glue is provided on the circumference of both second tab portions, and the tab glue abuts against the second mounting portion.

[0016] The utility model discloses a low-resistance three-electrode battery, comprising a housing, a battery cell, and an electrode assembly. The housing is in a square shape and has a filling cavity formed therein. The filling cavity is filled with an electrode liquid. The battery cell is located on a side away from the filling cavity and immersed in the electrode liquid. The electrode assembly comprises a first electrode and two second electrodes of opposite polarity. An inclined surface is provided at a top corner of the housing, the inclined surface connecting the two side surfaces. The first electrode is mounted on the inclined surface, and two second electrodes are installed at intervals on one of the side surfaces and located on a side of the housing close to the battery cell. The first electrode and the two second electrodes form a complete path with the battery cell through the electrode liquid. By arranging the first electrode on the inclined surface close to the two second electrodes, the effective electrode area of the battery is increased, thereby reducing the battery resistance and improving the battery efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention 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, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0018] Figure 1 This is a front view of an embodiment of a low-resistance three-electrode battery of the present invention;

[0019] Figure 2 for Figure 1 A front view of the first electrode of the low resistance three-electrode battery shown;

[0020] Figure 3 for Figure 1 Front view of the second electrode of the low-resistance three-electrode battery.

[0021] Description of Figure Numbers:

[0022] Label name Label name 10 case 312 First burr section 11 Inclined surface 313 Reference electrode 20 battery cells 32 Second electrode 30 Electrode assembly 321 Second pole ear 31 First electrode 322 Second burr part 311 First pole ear 314 Ear glue

[0023] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0026] In addition, the descriptions of "first", "second", etc. in the present utility model are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the meaning of "and / or" appearing in the full text is to include three parallel solutions. Taking "A and / or B as an example", it includes solution A, or solution B, or solutions that meet both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0027] The utility model proposes a low-resistance three-electrode battery, combined with Figures 1 to 3 The low-resistance three-electrode battery includes a shell 10, a battery cell 20 and an electrode assembly 30.

[0028] The housing 10 is formed with a filling cavity filled with electrode liquid. The housing 10 is in a square shape. An inclined surface 11 is provided at one corner of the housing 10. The inclined surface 11 connects two adjacent side surfaces of the housing 10.

[0029] The battery cell 20 is arranged on a side of the filling cavity away from the inclined surface 11 and immersed in the electrode liquid;

[0030] The electrode assembly 30 includes a first electrode 31 and two second electrodes 32. The first electrode is installed on the inclined surface 11, and the two second electrodes 32 are installed at intervals on one of the side surfaces and are located on the side of the shell 10 close to the battery cell 20. The two second electrodes 32 have opposite polarities. The first electrode 31 and the two second electrodes 32 form a complete passage with the battery cell 20 through the electrode liquid.

[0031] The low-resistance three-electrode battery mainly includes a shell 10, a battery cell 20 and an electrode assembly 30. The shell 10 serves as the main body of the entire battery, and a filling cavity is provided inside the shell. This filling cavity is mainly used to store the electrode liquid. The electrode liquid plays a key role in the operation of the battery. It is specifically configured as a conductive liquid or a solid electrolyte, which can provide the necessary electrolyte for the battery cell 20 to ensure the conduction of current. The shape of the shell 10 is a cube. This shape not only increases the stability of the structure, but also enables the battery to maintain high efficiency in various applications. An inclined surface 11 is provided at a top corner of the shell 10. The existence of this inclined surface 11 makes the electrode liquid more uniform in flow and distribution, thereby optimizing the performance of the battery.

[0032] The battery cell 20, the core of the battery, is installed in the filling cavity and completely immersed in the electrode liquid. The main function of the battery cell 20 is to store electrical energy and release it when needed, ensuring an efficient and stable power supply. At the same time, the battery cell is placed in the filling cavity, away from the inclined surface 11. This ensures that the battery cell is not affected by the flow of the electrode liquid, thereby maintaining a stable working state. The battery cell is immersed in the electrode liquid. This arrangement facilitates the exchange of electrolytes between the battery cell and the electrode liquid, further optimizing the performance of the battery.

[0033] The electrode assembly 30 includes a first electrode 31 and two second electrodes 32, which are the parts of the battery responsible for transmitting current. The first electrode is mounted on the inclined surface 11, while the two second electrodes are installed at intervals on one side of the shell, close to the side of the battery cell. The polarity of the two second electrodes is opposite. This arrangement allows the current to form a complete circuit between the three electrodes, thereby improving the working efficiency of the battery. Both the first electrode 31 and the second electrode 32 form a complete path with the battery cell 20 through the electrode liquid, which means that the current can flow freely between the battery cell 20 and the electrode through the electrode liquid, thereby ensuring the stable operation of the battery, reducing resistance and energy loss, and thus extending the service life of the battery.

[0034] The low-resistance three-electrode battery of the present invention makes full use of the setting of the inclined surface 11. By providing an inclined surface at a corner of the three-electrode battery shell close to the two second electrodes and adding a first electrode at the inclined surface, the effective electrode surface area of the battery is increased, thereby improving the efficiency of the battery.

[0035] Please refer to Figure 1 In one embodiment of the present application, the angle between the inclined surface 11 and the adjacent side surface is 120°-150°, preferably 135° or 140° in this application. This angle maximizes the contact area between the edge of the first electrode 31 and the conductive liquid or solid electrolyte, increasing the effective contact area between the electrode and the electrolyte, thereby improving battery performance. It also reduces internal resistance. The edge of the housing with the inclined surface 11 creates more linear contact areas, which facilitates the transmission of electrons and ions, reduces the battery's internal resistance, and improves the battery's discharge performance and power output.

[0036] Furthermore, by increasing the contact area and reducing the internal resistance, the inclined surface 11 can improve the cycle life of the battery and extend the service life of the battery.

[0037] Please refer to Figure 2 In one embodiment of the present application, the first electrode 31 includes a first electrode ear portion 311 and a first burr portion 312 connected to each other. The first burr portion 312 is disposed in the filling cavity, and the first electrode ear portion 311 is penetrated through the inclined surface and exposed to the shell.

[0038] In this embodiment, the first electrode 31 is composed of two parts: a first electrode ear portion 311 and a first burr portion 312 . The two parts are integrated into one structure to form a complete functional unit.

[0039] The first pole ear portion 311 is the main part of the electrode, which is responsible for transmitting current. The first pole ear portion 311 is arranged through the inclined surface 11 so that it can extend from the inside of the shell 10 to the outside. This arrangement enables the first pole ear portion 311 to be effectively connected to the external circuit, thereby ensuring smooth current transmission.

[0040] The first burr portion 312 is provided in the filling cavity. Its main function is to increase the surface area of the electrode. The burrs can increase the effective surface area of the electrode and improve the contact area between the electrode and the electrolyte, which helps to improve the charge transfer rate and reaction efficiency of the battery. The setting of the first burr portion 312 just meets this requirement. It can be firmly fixed in the filling cavity to prevent the electrode from moving or being damaged.

[0041] Please refer to Figure 2 In one embodiment of the present application, a reference electrode 313 is provided around the outer periphery of the first burr portion 312 , and the reference electrode 313 is immersed in the electrode liquid to form a complete passage with the battery cell.

[0042] In this embodiment, a reference electrode 313 is wound around the outer side of the first burr portion 312. This arrangement is not only compact in structure, but also effectively reduces space occupancy. The reference electrode 313 is immersed in the electrode liquid and can form a complete path with the battery cell. At the same time, it can accurately detect the electrochemical properties of the electrode liquid, providing key reference data for subsequent detection.

[0043] Please refer to Figure 2 In one embodiment of the present application, the reference electrode 313 occupies 1 / 2-2 / 3 of the first burr portion 312 in the length direction of the first electrode ear portion 311 .

[0044] In this embodiment, the reference electrode occupies 1 / 2 to 2 / 3 of the length of the first tab 311. This configuration ensures accurate voltage and current feedback during the battery's charge and discharge processes. Specifically, it can occupy 2 / 3 of the first tab 311. Experimental verification shows that this ratio provides a stable reference voltage, helping the battery management system better control the battery's charge and discharge processes.

[0045] Furthermore, this ratio setting also helps to reduce the uneven distribution of the electric field inside the battery, thereby extending the service life of the battery, while helping to reduce the internal resistance of the battery and improving the charge and discharge performance of the battery.

[0046] Please refer to Figure 2 In one embodiment of the present application, the reference electrode 313 is a lithium electrode, a nickel electrode, or a copper-plated nickel electrode.

[0047] In this embodiment, when a lithium electrode is used as a reference electrode, the reversible redox reaction of lithium can be utilized to establish a potential standard. The lithium redox reaction has good reversibility and stability, providing an accurate and reliable reference potential. The lithium electrode also has low internal resistance and high conductivity, which helps to reduce electrode polarization effects during measurement.

[0048] In other embodiments, nickel electrodes, commonly used in electrochemical experiments in acidic solutions, can also be used. Nickel's redox reaction in acidic solutions is reversible and stable, making it suitable as a reference electrode for accurate potential measurements. Furthermore, nickel electrodes are relatively inexpensive to use.

[0049] Copper-nickel-plated electrodes can also be used. Copper-nickel-plated electrodes are reference electrodes made of a copper substrate coated with a nickel layer. Copper / nickel reference electrodes have good stability and reversibility in both acidic and alkaline solutions, and can provide reliable potential measurements. Copper-nickel-plated electrodes also have good conductivity and corrosion resistance.

[0050] Please refer to Figure 2In one embodiment of the present application, a tab glue 314 is provided on the peripheral side of the first tab portion 311 , and a first mounting portion is provided on the inclined surface 11 , and the tab glue abuts against the first mounting portion.

[0051] In this embodiment, a tab glue 314 is provided around the first tab portion 311, and a first mounting portion is provided on the inclined surface 11. The tab glue 314 not only has good adhesion but also fits on the first mounting portion of the inclined surface 11. During hot pressing and sealing, the tab glue will adhere to the first mounting portion, thereby ensuring the firmness between the first tab portion 311 and the inclined surface 11.

[0052] Please refer to Figure 1 In one embodiment of the present application, two second mounting portions are further provided on a side surface of the housing 10 close to the battery cell 20 , and one end of a second electrode 32 is provided on a second mounting portion.

[0053] In this embodiment, two second mounting portions are provided on a side of the housing 10 near the battery cell 20. Second electrodes 32 are located at these two second mounting portions, enabling effective connection between the second electrodes 32 and the battery cell 20 while ensuring battery stability and safety. This allows the second electrodes 32 to be flexibly positioned at the second mounting portions, adapting to changes in the shape and size of the battery cell 20 and maintaining stable contact during battery operation.

[0054] Please refer to Figure 3 In one embodiment of the present application, each second electrode includes a second pole ear portion 321 and a second burr portion 322. The second burr portion 322 is formed on the circumferential side of one end of the second pole ear portion 321. The second burr portion 322 is arranged in the filling cavity, close to one end of the battery cell 20 in the filling cavity, and spaced apart from the battery cell 20. The other end of the second pole ear portion 321 passes through the side and is exposed in the shell 10.

[0055] In this embodiment, both second electrodes include a second pole ear portion 321 and a second burr portion 322, wherein the second pole ear portion 321 is the main part of the second electrode, responsible for connecting with the external circuit and transmitting current, and the second burr portion 322 is arranged in the filling cavity. Its main function is to increase the surface area of the electrode. The burrs can increase the effective surface area of the electrode and increase the contact area between the electrode and the electrolyte, which helps to improve the charge transfer rate and reaction efficiency of the battery. The two second burr portions 322 are arranged in the filling cavity near one end of the battery cell 20. This arrangement ensures that they can maintain an appropriate distance from the battery cell 20 to avoid excessive pressure or friction, while also ensuring smooth transmission of current.

[0056] The second pole ear portion 321 is located at the other end of the second electrode 32 away from the battery cell and is respectively arranged at the two second mounting portions. This arrangement makes the connection of the electrodes more stable and not easy to fall off or loosen, thereby improving the stability of the entire system.

[0057] Please refer to Figures 2 to 3 In one embodiment of the present application, the tab glue 314 is provided on the circumference of the two second tab portions 321 , and the tab glue 314 abuts against the second mounting portion.

[0058] In this embodiment, the pole ear glue 314 is also provided around the two second pole ear portions 321. The pole ear glue 314 can be fitted to the second mounting portion. During hot pressing and sealing, the pole ear glue will be bonded to the second mounting portion, thereby enhancing the connection effect between the second pole ear portion and the second mounting portion, and avoiding the second pole ear portion 321 from falling off due to loose connection and causing leakage.

[0059] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A low-resistance three-electrode battery, characterized in that: include: A shell, wherein the shell is formed with a filling cavity filled with an electrode liquid, the shell is in a square shape, and an inclined surface is provided at a top corner of the shell, the inclined surface connecting two adjacent side surfaces of the shell; a battery cell, the battery cell being arranged on a side of the filling cavity away from the inclined surface and immersed in the electrode liquid; as well as An electrode assembly, the electrode assembly comprising a first electrode and two second electrodes, the first electrode being installed on the inclined surface, the two second electrodes being installed at intervals on one of the side surfaces and located on the side of the shell close to the battery cell, the two second electrodes having opposite polarities, and the first electrode and the two second electrodes forming a complete passage with the battery cell through the electrode liquid.

2. The low-resistance three-electrode battery according to claim 1, wherein: The included angle between the inclined surface and an adjacent side surface is 120°-150°.

3. The low-resistance three-electrode battery according to claim 1, wherein: The first electrode includes a first electrode ear portion and a first burr portion. The first burr portion is formed on one circumferential side of the first electrode. The first burr portion is disposed in the filling cavity. The other end of the first electrode ear portion passes through the inclined surface and is exposed in the shell.

4. The low-resistance three-electrode battery according to claim 3, wherein: A reference electrode is wound around the outer periphery of the first burr portion, and the reference electrode is immersed in the electrode liquid to form a complete passage with the battery core.

5. The low-resistance three-electrode battery according to claim 4, wherein: The reference electrode occupies 1 / 2-2 / 3 of the first burr portion in the length direction of the first electrode ear portion.

6. The low-resistance three-electrode battery according to claim 4, wherein: The reference electrode is one of a lithium electrode, a nickel electrode or a copper-plated nickel electrode.

7. The low-resistance three-electrode battery according to claim 3, wherein: Tab glue is provided on the peripheral side of the first tab portion, and a first mounting portion is provided on the inclined surface, and the tab glue abuts against the first mounting portion.

8. The low-resistance three-electrode battery according to claim 7, wherein: Two second mounting portions are provided on a side surface of the shell close to the battery core, and one end of a second electrode is passed through a second mounting portion.

9. The low-resistance three-electrode battery according to claim 8, wherein: Each of the second electrodes includes a second pole ear portion and a second burr portion, the second burr portion is formed on the peripheral side of one end of the second pole ear portion, the second burr portion is arranged in the filling cavity and is spaced apart from the battery cell, and the other end of the second pole ear portion passes through the side surface and is exposed in the shell.

10. The low-resistance three-electrode battery according to claim 9, wherein: The tab glue is provided on the circumference of the two second tab portions, and the tab glue abuts against the second mounting portion.

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