CN219419467U - Battery and power equipment - Google Patents

Abstract

The utility model relates to the technical field of new energy, in particular to a battery and power equipment. The battery includes: the shell, there is at least one liquid injection hole on a wall of the shell; the pole group is arranged in the shell, and the end face of the pole group corresponding to the liquid injection hole is concavely provided with a diversion trench which extends along the length direction of the shell; the shell and the pole group are surrounded at the position of the diversion trench to form a flow passage suitable for passing air or liquid. According to the battery provided by the utility model, the diversion trench is concavely formed on the end face of the pole group corresponding to the liquid injection hole, so that the shell and the pole group are surrounded at the diversion trench to form the through-flow channel suitable for passing gas or liquid, the through-flow channel can guide electrolyte entering the shell in the liquid injection process, the condition that the electrolyte is soaked slowly due to the longer length of the pole group is avoided, multiple liquid injection and infiltration are avoided, and the liquid injection efficiency is improved.

Description

Battery and power equipment

Technical Field

The utility model relates to the technical field of new energy, in particular to a battery and power equipment.

Background

The existing manufacturing process of the battery is to fill electrolyte into the battery from the top of the battery, but the electrolyte is soaked slowly due to the longer length of the pole group, so that multiple liquid injection and soaking are needed, the process flow is complicated and complex, and the liquid injection efficiency is low.

Disclosure of Invention

Therefore, the utility model aims to overcome the defect of low liquid injection efficiency in the battery manufacturing process in the prior art, thereby providing a battery and power equipment capable of improving the liquid injection efficiency.

In order to solve the above technical problems, the present utility model provides a battery, comprising:

the device comprises a shell, wherein at least one liquid injection hole is formed in one wall surface of the shell;

the pole group is arranged in the shell, a diversion trench is concavely formed on the end face of the pole group corresponding to the liquid injection hole, and the extending direction of the diversion trench is the same as the extending direction of the wall surface of the shell, on which the liquid injection hole is arranged;

the shell and the pole group are surrounded at the position of the diversion trench to form a flow passage suitable for passing air or liquid.

Optionally, the number of the liquid injection holes is a plurality of; the through-flow channel is simultaneously communicated with the liquid injection holes.

Optionally, the casing is further provided with an explosion-proof valve, and the explosion-proof valve and the liquid injection hole are located on the wall surface of the same side of the casing.

Optionally, the extending direction of the diversion trench is parallel to the length direction of the pole group.

Optionally, the liquid injection hole includes a through hole penetrating through the casing, and a containing groove corresponding to the through hole, and formed by recessing the casing toward the pole group;

the battery further includes:

a sealing spike adapted to block the through-hole and at least partially within the flow-through channel after passing through the through-hole; the sealing nail cover is arranged in the accommodating groove and is suitable for fixing the sealing nail.

Optionally, the material of the sealing nail cover is the same as the material of the shell, and the sealing nail cover is welded and fixed with the shell.

Optionally, the width of the diversion trench is L, and L meets L being greater than or equal to L+0.5mm, wherein L is the width of the part of the inner space of the injection Kong Qinru shell.

Optionally, the height of the diversion trench is H, and H meets H not less than H+1.5mm, wherein H is the height from one end of the sealing nail extending into the shell to the inner wall surface of the shell.

Optionally, the liquid injection hole and the explosion-proof valve are both communicated with the flow passage.

The power equipment provided by the utility model comprises:

a power equipment body;

and a battery as described above electrically connected to the power plant body.

The technical scheme of the utility model has the following advantages:

1. according to the battery provided by the utility model, the diversion trench is concavely formed on the end face of the pole group corresponding to the liquid injection hole, so that the shell and the pole group are surrounded at the diversion trench to form the through-flow channel suitable for passing gas or liquid, the through-flow channel can guide electrolyte entering the shell in the liquid injection process, the condition that the electrolyte is soaked slowly due to the longer length of the pole group is avoided, multiple liquid injection and infiltration are avoided, and the liquid injection efficiency is improved.

2. According to the battery provided by the utility model, the plurality of liquid injection holes are arranged, and the through-flow channels are simultaneously communicated with the plurality of liquid injection holes, so that liquid injection can be carried out from one liquid injection hole during liquid injection, and exhaust is carried out from the other liquid injection hole through the communication of the through-flow channels, so that the liquid injection efficiency is improved. And after the electrolyte flows through the flow channel, the contact area between the electrolyte and the electrode group can be increased, the infiltration speed of the electrolyte is accelerated, and the liquid injection efficiency is improved.

3. According to the battery provided by the utility model, the explosion-proof valve is arranged on the shell, and the explosion-proof valve and the liquid injection hole are positioned on the wall surface of the same side of the shell, so that the liquid injection hole and the explosion-proof valve can share the flow passage, and when thermal runaway occurs in the battery, the gas in the electrode group is guided to the explosion-proof valve through the flow passage, so that the gas is ensured to be discharged, the exhaust problem of the heat-dissipating battery is improved, the electrolyte and the gas are conveniently guided by the flow passage, the liquid injection efficiency of the electrolyte is improved in the production process, and the explosion of the battery caused by unsmooth gas flow in the later use process is prevented.

4. According to the battery provided by the utility model, the width of the diversion trench is larger than that of the part of the inner space of the liquid injection Kong Qinru shell, so that the collision between the pole group and the liquid injection hole during assembly is avoided, and the smooth assembly of the pole group is ensured.

5. According to the battery provided by the utility model, the height of the diversion trench is larger than the height of one end of the sealing nail extending into the shell from the inner wall surface of the shell, so that the sealing nail can be prevented from blocking the flow passage after being assembled, and the smooth flow of gas or liquid is ensured.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present utility model, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic view showing an exploded state of a battery according to the present utility model;

FIG. 2 is an enlarged view of the position of the liquid injection hole of the present utility model;

FIG. 3 is an enlarged view of the injection hole of the present utility model for installing the sealing spike and the sealing spike cover;

FIG. 4 is a schematic view of a pole set of the present utility model;

FIG. 5 is a side view of the pole set of the present utility model;

FIG. 6 is a cross-sectional view of the cell of the present utility model in the position of a seal pin;

fig. 7 is a partial enlarged view of the battery of the present utility model.

Reference numerals illustrate:

the device comprises a 1-positive electrode cover plate, a 2-end plate, a 3-electrode group, a 31-diversion trench, a 4-shell, a 41-liquid injection hole, a 411-through hole, a 412-containing groove, a 42-sealing nail, a 43-sealing nail cover, a 44-explosion-proof valve, a 5-insulating film, a 6-negative electrode cover plate and a 7-through flow channel.

Detailed Description

The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In addition, the technical features of the different embodiments of the present utility model described below may be combined with each other as long as they do not collide with each other.

Example 1

As shown in fig. 1 to 7, the battery provided in this embodiment includes:

a housing 4, wherein at least one liquid injection hole 41 is formed on one wall surface of the housing 4;

the pole group 3 is arranged in the shell 4, a diversion trench 31 is concavely formed on the end surface of the pole group 3 corresponding to the liquid injection hole 41, and the extending direction of the diversion trench 31 is the same as the extending direction of the wall surface of the shell 4 provided with the liquid injection hole 41;

the housing 4 and the pole group 3 are surrounded at the position of the diversion trench 31 to form a ventilation channel 7 suitable for ventilation or liquid ventilation.

The liquid injection hole 41 is used for injecting electrolyte into the casing 4 during the battery production process.

Alternatively, in the present embodiment, the liquid injection hole 41 is provided on an upper wall surface of the housing 4 in the height direction.

Optionally, as shown in fig. 1, openings are formed on both sides of the casing 4 along the length direction, the opening on one side of the casing 4 along the length direction is suitable for being connected with the positive electrode cover plate 1, and the opening on the other side of the casing 4 along the length direction is suitable for being connected with the negative electrode cover plate 6. After the casing 4, the positive electrode cover plate 1 and the negative electrode cover plate 6 are assembled, a closed cavity is formed, and the electrode group 3 is arranged in the closed cavity.

Optionally, the battery further includes: an end plate 2, wherein the end plate 2 is arranged between the positive electrode cover plate 1 and the electrode group 3.

Optionally, the battery further includes: and an insulating film 5, wherein the insulating film 5 is suitable for being coated on the outer surface of the shell 4, and the insulating film 5 is made of an insulating material.

In this embodiment, the upper end surface of the pole group 3 along the height direction is concavely formed with the diversion trench 31, so that the liquid injection hole 41 is disposed opposite to the diversion trench 31 along the height direction, and thus, when the electrolyte is injected from the liquid injection hole 41, the electrolyte can flow into the diversion trench 31.

The extending direction of the diversion trench 31 is the same as the extending direction of the wall surface of the casing 4 provided with the liquid injection hole 41, in this embodiment, the diversion trench 31 extends along the length direction of the pole group 3, and the wall surface of the casing 4 provided with the liquid injection hole 41 also extends along the length direction.

According to the battery provided by the embodiment, the diversion trench 31 is concavely formed on the end face of the pole group 3 corresponding to the liquid injection hole 41, so that the shell 4 and the pole group 3 enclose the diversion trench 31 to form the through-flow channel 7 suitable for passing gas or liquid, and the through-flow channel 7 can play a guiding role on electrolyte entering the shell in the liquid injection process, so that the condition that the electrolyte is soaked slowly due to the longer pole group is avoided, repeated liquid injection and infiltration are avoided, and the liquid injection efficiency is improved.

At least one liquid injection hole 41 is formed on one wall surface of the shell 4, and when the length of the shell 4 is less than or equal to 300mm, one liquid injection hole 41 is preferably arranged; when the length of the housing is greater than 300mm, 2 or more liquid injection holes 41 are preferably provided.

Specifically, the number of the liquid injection holes 41 is plural; the through-flow channel 7 communicates with a plurality of the liquid injection holes 41 at the same time.

The battery provided by this embodiment is through setting up a plurality of notes liquid hole 41, and the through-flow channel 7 is linked together with a plurality of notes liquid hole 41 simultaneously to when annotating the liquid, can annotate the liquid from a notes liquid hole, and through the intercommunication of through-flow channel 7, exhaust from another one notes liquid hole 41 department, improve notes liquid efficiency. And after the electrolyte flows through the flow channel 7, the contact area between the electrolyte and the electrode group 3 can be increased, the infiltration speed of the electrolyte is accelerated, and the liquid injection efficiency is improved.

Specifically, the casing 4 is further provided with an explosion-proof valve 44, and the explosion-proof valve 44 and the liquid injection hole 41 are located on the same side wall surface of the casing 4.

When the battery unit is abnormal in operation and generates gas, the gas can be discharged through the explosion-proof valve, so that a large safety accident is avoided. Optionally, an explosion-proof valve hole is formed in the bottom surface of the housing 4 along the height direction, and the explosion-proof valve 44 is disposed in the explosion-proof valve hole. The heat dissipation battery further comprises an explosion-proof valve patch attached to the side of the explosion-proof valve 44 facing the outer side of the housing 4.

When the electrolyte is injected, the electrolyte can quickly flow to the whole area of the electrode group along the flow channel 7, so that the electrolyte can be quickly and comprehensively and uniformly soaked.

When thermal runaway occurs in the use process of the battery, generated gas can be rapidly discharged to the explosion-proof valve through the flow passage 7, so that the safety of the pole group is ensured.

According to the battery provided by the embodiment, the explosion-proof valve 44 is arranged on the shell 4, the explosion-proof valve 44 and the liquid injection hole 41 are positioned on the wall surface of the same side of the shell 4, so that the liquid injection hole 41 and the explosion-proof valve 44 share the through-flow channel 7, when thermal runaway occurs in the battery, the gas in the electrode group is guided to the explosion-proof valve through the through-flow channel 7 to ensure gas discharge, the exhaust problem of the heat-dissipating battery is solved, the through-flow channel 7 is convenient to guide electrolyte and gas, the liquid injection efficiency of the electrolyte is improved in the production process, and the explosion of the battery caused by unsmooth gas flow is prevented in the later use process.

Through annotating liquid hole 41 and explosion-proof valve 44 sharing and passing through the passageway 7, can practice thrift the space waste in the battery inside, the same passageway 7 that passes through of rational utilization improves the energy density of battery.

Specifically, the extending direction of the diversion trench 31 is parallel to the length direction of the pole group 3.

In this embodiment, the diversion trench 31 penetrates through the pole group 3 along the length direction of the pole group 3, so as to ensure the infiltration efficiency of the electrolyte in the length direction of the pole group 3.

Specifically, the liquid injection hole 41 includes a through hole 411 penetrating the housing 4, and a receiving groove 412 corresponding to the position of the through hole 411 and recessed from the housing 4 toward the pole group 3;

the battery further includes:

a sealing spike 42, said sealing spike 42 being adapted to block said through hole 411 and said sealing spike 42 being at least partially located within said flow channel 7 after passing through said through hole 411; a sealing pin cover 43 disposed in the receiving groove 412 and adapted to fix the sealing pin 42.

Optionally, the sealing pin 42 is made of rubber.

Optionally, the sealing pin 42 is in a transition fit or an interference fit with the through hole 411.

Through setting up holding tank 412 to with sealed nail lid 43 set up in holding tank 412, thereby can guarantee the upper surface parallel and level of casing 4, conveniently carry out the installation and the stack of battery, reduce the space occupation.

Optionally, the receiving groove 412 is extruded from the housing 4.

Specifically, the material of the sealing nail cover 43 is the same as that of the housing 4, and the sealing nail cover 43 is welded and fixed with the housing 4. By welding the seal nail cover 43 to the housing 4, the mounting firmness of the seal nail 42 can be ensured, the loosening is avoided, and the leakage is prevented.

As an alternative implementation manner, as shown in fig. 5, the cross-sectional shape of the diversion trench 31 is circular arc, and as a variant, the cross-sectional shape of the diversion trench 31 may also be quadrilateral, trapezoid, triangle, etc.

Specifically, the width of the diversion trench 31 is L, and L satisfies l+.l+0.5mm, where L is the width of the portion of the injection hole 41 that invades the inner space of the housing.

By setting the width of the diversion trench 31 to be larger than the width of the part of the injection hole 41 which invades the inner space of the shell, the collision between the pole group and the injection hole 41 during assembly is avoided, and the smooth assembly of the pole group 3 is ensured.

Specifically, the height of the diversion trench 31 is H, and H satisfies H being greater than or equal to h+1.5mm, where H is the height from the inner wall surface of the housing 4 of one end of the sealing nail 42 extending into the housing 4.

The height of the diversion trench 31 is larger than that of one end of the sealing nail 42 extending into the shell 4 from the inner wall surface of the shell 4, so that the sealing nail 42 can be prevented from blocking the flow passage 7 after assembly, and smooth flow of gas or liquid is ensured.

Specifically, the liquid injection hole 41 and the explosion-proof valve 44 are both in communication with the flow passage 7.

By communicating both the liquid injection hole 41 and the explosion-proof valve 44 with the flow channel 7, the liquid injection hole 41 and the explosion-proof valve 44 can share the flow channel 7, thereby saving the space inside the battery and improving the energy density of the battery.

Example two

The present embodiment provides a power apparatus including:

a power equipment body;

and a battery as in the first embodiment electrically connected to the power unit body.

In this embodiment, the power device may be an electric automobile, an electric motorcycle, a ship, an aircraft, a loading machine, or an electronic device such as a mobile phone or a tablet computer.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present utility model.

Claims (10)

1. A battery, comprising:

the device comprises a shell, wherein at least one liquid injection hole is formed in one wall surface of the shell;

the pole group is arranged in the shell, a diversion trench is concavely formed on the end face of the pole group corresponding to the liquid injection hole, and the diversion trench extends along the length direction of the shell;

the shell and the pole group are surrounded at the position of the diversion trench to form a flow passage suitable for passing air or liquid.

2. The battery of claim 1, wherein the number of liquid injection holes is a plurality; the through-flow channel is simultaneously communicated with the liquid injection holes.

3. The battery of claim 1, wherein the housing is further provided with an explosion-proof valve, and the explosion-proof valve and the liquid injection hole are located on the same side wall surface of the housing.

4. The battery of claim 1, wherein the direction of extension of the flow guide groove is parallel to the length direction of the pole group.

5. The battery according to claim 1, wherein the liquid filling hole includes a through hole penetrating the case, and a receiving groove corresponding to the through hole in position and recessed from the case toward the pole group;

the battery further includes:

a sealing spike adapted to block the through-hole and at least partially within the flow-through channel after passing through the through-hole; the sealing nail cover is arranged in the accommodating groove and is suitable for fixing the sealing nail.

6. The battery of claim 5, wherein the sealing spike cover is made of the same material as the housing, and the sealing spike cover is welded to the housing.

7. The battery of claim 5, wherein the width of the flow guide groove is L, and L satisfies L being equal to or greater than l+0.5mm, wherein L is the width of the portion of the inner space of the liquid injection Kong Qinru casing.

8. The battery according to claim 5, wherein the height of the diversion trench is H, and H satisfies H being equal to or greater than H+1.5mm, wherein H is the height from the inner wall surface of the housing at one end of the sealing nail extending into the housing.

9. The battery of claim 3, wherein the fill port and the explosion-proof valve are in communication with the flow channel.

10. A power plant, comprising:

a power equipment body;

and a battery as claimed in any one of claims 1 to 9 electrically connected to the power plant body.