CN219937075U

CN219937075U - Positive pole suitable for high-current pulse structure

Info

Publication number: CN219937075U
Application number: CN202321267455.0U
Authority: CN
Inventors: 马旭军
Original assignee: Liyuan Battery Technology Shenzhen Co ltd
Current assignee: Liyuan Battery Technology Shenzhen Co ltd
Priority date: 2023-05-24
Filing date: 2023-05-24
Publication date: 2023-10-31
Anticipated expiration: 2033-05-24

Abstract

The utility model discloses a positive electrode suitable for a heavy current pulse structure in the technical field of lithium-manganese batteries, which comprises a current collecting framework, a metal ring and a current collecting net, wherein the current collecting framework is formed by combining manganese dioxide, the metal ring and the current collecting net, the manganese dioxide is fixedly arranged at the bottom of the current collecting framework, the metal ring is arranged at the top of the manganese dioxide, the current collecting net is arranged in the middle of the current collecting framework, the current collecting net is fixedly clamped between the manganese dioxide and the metal ring, and the current collecting framework is sleeved with the current collecting net through the metal ring, and then the metal ring is sleeved on a solid powder cake of the positive electrode manganese dioxide by the current collecting net, so that the positive electrode structure is not collapsed due to expansion when the battery discharges to 80% DOD, and still maintains a relatively complete structure.

Description

Positive pole suitable for high-current pulse structure

Technical Field

The utility model relates to the technical field of lithium-manganese batteries, in particular to an anode suitable for a high-current pulse structure.

Background

The rated voltage of the lithium-manganese battery is 3.0V, which is about 2 times of that of a dry battery, the discharge voltage is stable, the solubility of negative lithium in an electrohydraulic liquid of a PC+DME system is only 1mg/kg, for a long-life battery, lithium-manganese dioxide has good storage performance, high-rate discharge performance and rich material resources, so that the lithium-manganese dioxide becomes the first choice of an electronic tag of the Internet of things, high cost performance is required for the long life, high requirements are put forth on the stability of a positive electrode structure of the battery by a high-current pulse, and especially the stability of a positive electrode framework is a test, and only a positive electrode net or a ring is used as a current collector support framework in the past; when the mesh grid is used as a framework and the discharge depth of the battery is 50%, the current collecting net is stripped from the solid powder cake, or when the ring is used as a support, the initial discharge pressure drop of the battery is large, although the discharge can be continuously carried out, when the discharge depth of the battery using the ring as the support framework reaches 60%, the internal contact of the battery cannot be continuously carried out due to uneven overall reaction of the positive electrode, or the height of the battery is increased by the depth of discharge to exceed the thickness of a battery chamber, so that the electric appliance can be extruded and expanded to deform, and therefore, the positive electrode suitable for a high-current pulse structure is provided, and the problems are solved.

Disclosure of Invention

Aiming at the problems, the utility model provides a positive electrode suitable for a high-current pulse structure, which has the advantages of stability, no collapse and good pulse performance when the discharge depth of a battery reaches 80 percent.

The technical scheme of the utility model is as follows:

the utility model provides a be fit for positive pole of heavy current pulse structure, includes mass flow skeleton, metal ring and current collecting net, the mass flow skeleton is formed by manganese dioxide, metal ring and current collecting net combination, the manganese dioxide is fixed to be set up in the bottom of mass flow skeleton, the top of mass flow skeleton is equipped with the metal ring, the metal ring is fixed to be set up in the top of manganese dioxide, the middle part of mass flow skeleton is equipped with the current collecting net, the fixed centre gripping of current collecting net is between manganese dioxide and metal ring.

The current collecting framework adopts a metal ring sleeve current collecting net, and then the metal ring is sleeved on the solid powder cake of the anode manganese dioxide by the current collecting net, so that the anode structure is not collapsed due to expansion when the battery is discharged to 80% DOD, and a more complete structure is still maintained, therefore, the voltage drop change during pulse is obviously smaller than that of the net or the ring, and stable pulse voltage is still maintained during pulse, thereby improving the high-current discharge efficiency of the battery.

In a further technical scheme, the top of the metal ring is provided with a collecting groove, and a plurality of collecting grooves are arranged on the top of the metal ring in parallel.

The metal ring of the positive electrode and the current collecting net are provided with a certain depth of corrugation and sharp angles, and the current collecting net is protruded in the middle, so that the positive electrode and the shell can be always well contacted.

In a further embodiment, the manganese dioxide is in a solid cake-like structure.

Through adopting the manganese dioxide structure of solid powder cake form for the metal ring can take the stable cover of mass flow net to locate the top of manganese dioxide, keeps fixed, improves the stability of contact.

In a further technical scheme, the current collecting net is arranged on the inner side of the metal ring and is fixedly clamped between the metal ring and the manganese dioxide through the metal ring.

The metal ring is used for clamping the current collecting net between the metal ring and the manganese dioxide, and the metal ring is fixedly connected with the manganese dioxide to clamp the current collecting net, so that a net is formed between the metal ring and the manganese dioxide under the ring, and the net sheet is wrapped in the ring, so that the stability of the current collecting net is ensured.

In a further technical scheme, the top of the manganese dioxide extends to the inner side of the bottom end of the metal ring, so that the metal ring is fixedly sleeved on the top of the manganese dioxide.

Through combining the metal ring and the collector net and sleeving the metal ring and the collector net on the solid powder cake-shaped manganese dioxide, the phenomenon that the contact between the ring and the shell is poor at the initial stage of battery discharge and the voltage suddenly drops, and the internal structure is poor at the later stage of the falling of the collector net or the collector ring and the powder cake is solved.

The beneficial effects of the utility model are as follows:

1. the current collecting framework is a metal ring sleeve current collecting net, and then the metal ring is sleeved on the solid powder cake of the anode manganese dioxide by the current collecting net, so that the current collecting framework is in good contact. The initial discharge of the battery can not appear as the sudden voltage drop of the voltage is large when other batteries in the same row appear pulse, and hysteresis phenomenon appears;

2. through the design of the current collecting framework, when the depth of discharge of the battery reaches 80%, the current collecting framework is stable and does not collapse, and the current collecting framework still has good pulse performance. Is superior to other structures. Meeting the market demand.

Drawings

FIG. 1 is a schematic view of the overall structure of an embodiment of the present utility model;

FIG. 2 is a schematic top view of an embodiment of the present utility model;

fig. 3 is a schematic front view of an embodiment of the present utility model.

Reference numerals illustrate:

1. a current collecting framework; 2. manganese dioxide; 3. a metal ring; 4. a collecting groove; 5. a current collecting net.

Detailed Description

Embodiments of the present utility model are further described below with reference to the accompanying drawings.

Example 1:

as shown in fig. 1-3, an anode suitable for a heavy current pulse structure comprises a current collecting framework 1, a metal ring 3 and a current collecting net 5, wherein the current collecting framework 1 is formed by combining manganese dioxide 2, the metal ring 3 and the current collecting net 5, the manganese dioxide 2 is fixedly arranged at the bottom of the current collecting framework 1, the metal ring 3 is fixedly arranged at the top of the manganese dioxide 2 at the top of the current collecting framework 1, the current collecting net 5 is arranged in the middle of the current collecting framework 1, and the current collecting net 5 is fixedly clamped between the manganese dioxide 2 and the metal ring 3.

Through adopting metal ring 3 cover current collecting net 5 with current collecting skeleton 1, the structure of current collecting net 5 cover on locating the solid powder cake of anodal manganese dioxide 2 is taken to the reuse metal ring 3 for when the battery discharges to 80% DOD, anodal structure can not collapse because of the inflation, still keeps more complete structure. The voltage drop variation upon pulsing is therefore significantly less than for a net or ring, and a smooth pulse voltage is maintained during pulsing. Thereby improving the high-current discharge efficiency of the battery

In a further technical scheme, the top of the metal ring 3 is provided with a collecting groove 4, and a plurality of collecting grooves 4 are arranged on the top of the metal ring 3 in parallel.

By arranging the corrugations and the sharp angles with certain depth on the metal ring 3 and the current collecting net 5 of the anode, the current collecting net 5 is protruded in the middle, so that the anode and the shell can be always ensured to be in good contact.

In a further embodiment, the manganese dioxide 2 is in the form of a solid cake.

Through adopting the manganese dioxide 2 structure of solid powder form for metal ring 3 can take the stable cover of current collector 5 to locate manganese dioxide 2's top, keeps fixed, improves the stability of contact.

In a further technical scheme, the current collecting net 5 is arranged on the inner side of the metal ring 3 and is fixedly clamped between the metal ring 3 and the manganese dioxide 2 through the metal ring 3.

The current collecting net 5 is clamped between the metal ring 3 and the manganese dioxide 2 by the metal ring 3, and the clamping effect on the current collecting net 5 is achieved by the fixed connection of the metal ring 3 and the manganese dioxide 2, so that a net is formed between the metal ring 3 and the manganese dioxide under the ring, and the net sheet is wrapped in the ring, so that the stability of the current collecting net 5 is ensured.

In a further technical scheme, the top of the manganese dioxide 2 extends to the inner side of the bottom end of the metal ring 3, so that the metal ring 3 is fixedly sleeved on the top of the manganese dioxide 2.

The metal ring 3 and the collector net 5 are combined and sleeved on the solid powder cake-shaped manganese dioxide 2, so that the phenomenon that the contact between the ring and the shell is poor at the initial stage of battery discharge and the voltage suddenly drops, and the inner structure is poor at the later stage of the falling of the collector net 5 or the collector ring and the powder cake is solved.

The foregoing examples merely illustrate specific embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model.

Claims

1. The utility model provides a be fit for positive pole of heavy current pulse structure, includes mass flow skeleton, metal ring and current collecting net, its characterized in that, mass flow skeleton is formed by manganese dioxide, metal ring and current collecting net combination, the manganese dioxide is fixed to be set up in mass flow skeleton's bottom, mass flow skeleton's top is equipped with the metal ring, the metal ring is fixed to be set up in the top of manganese dioxide, mass flow skeleton's middle part is equipped with the current collecting net, the fixed centre gripping of current collecting net is between manganese dioxide and metal ring.

2. The positive electrode suitable for a high-current pulse structure according to claim 1, wherein: the top of the metal ring is provided with a flow collecting groove, and a plurality of flow collecting grooves are arranged on the top of the metal ring in parallel.

3. The positive electrode suitable for a high-current pulse structure according to claim 1, wherein: the manganese dioxide is in a solid powder cake structure.

4. The positive electrode suitable for a high-current pulse structure according to claim 1, wherein: the current collecting net is arranged on the inner side of the metal ring and is fixedly clamped between the metal ring and the manganese dioxide through the metal ring.

5. The positive electrode suitable for a high-current pulse structure according to claim 1, wherein: the top of the manganese dioxide extends to the inner side of the bottom end of the metal ring, so that the metal ring is fixedly sleeved on the top of the manganese dioxide.