CN111509285A

CN111509285A - Battery and method for manufacturing battery

Info

Publication number: CN111509285A
Application number: CN202010455757.5A
Authority: CN
Inventors: 李敏; 范佳臻; 田秀君; 吴月
Original assignee: Hunan Xinminya New Energy Technology Co Ltd; Sichuan Xinminya Battery Technology Co Ltd; Suzhou Lingwei New Energy Technology Co Ltd
Current assignee: Hunan Lingpai Energy Storage Technology Co ltd; Hunan Lingpai New Energy Research Institute Co ltd; Hunan Lingpai New Energy Technology Co Ltd; Hengyang Lingpai New Energy Technology Co Ltd; Hunan Lead Power Dazhi Technology Inc
Priority date: 2020-05-26
Filing date: 2020-05-26
Publication date: 2020-08-07

Abstract

The present specification provides a battery and a method of making a battery, the battery including a housing, a cell, and at least one hollow tube. At least one hollow pipe penetrates through the battery core and the shell of the battery and is connected with the shell of the battery in a sealing mode. At least one hollow tube sets up near battery heat concentration area for battery heat concentration area's heat can reach battery case fast through at least one hollow tube, thereby accelerates battery heat concentration area's heat dissipation, and simultaneously, at least one hollow tube also can increase the area of cooling surface, dispels the heat with higher speed, reduces battery temperature, increases battery life. In addition, at least one hollow pipe can also enhance the strength of the shell, improve the shock resistance of the battery and prolong the service life of the battery.

Description

Battery and method for manufacturing battery

Technical Field

The present disclosure relates to the field of battery manufacturing, and more particularly, to a battery and a method for manufacturing the battery.

Background

With the rapid development of technology, batteries are used in a large number of applications in a variety of situations. Batteries widely used in the current market are classified into cylindrical batteries, square batteries and pouch batteries. The cylindrical battery is developed at the earliest, has perfect standardization degree and mature production process, but because the size of the cylindrical battery is limited, a large number of battery monomers are needed by the cylindrical battery module, so that the control management and the weight of the battery are very problems. In addition, the cylindrical battery has short service life and complex process, and the energy density after the composition is greatly reduced. The square battery has the advantages of strong plasticity, customized design, high structural strength, good mechanical load bearing capacity, small internal resistance of the battery, long service life, small reduction of energy density after composition and high space utilization rate. But the defects are that the standardization degree is low, the process is difficult to be unified, the process is complex, and the heat dissipation difficulty is high. The soft package battery has the obvious advantages of being thin in size, small in mass and capable of having higher energy density. In order to pursue higher energy density, battery maximization is more and more emphasized by various large battery enterprises or research and development mechanisms, and at present, a lot of battery maximization is also generated in the vehicle power battery, so that the module space utilization rate can be increased, the module energy density can be improved, the vehicle endurance can be further improved, and the vehicle power battery has the advantages of high reliability, low cost and the like. However, the enlargement of the single battery also causes serious internal heating of the battery and difficult heat diffusion, thereby reducing the cycle life of the battery.

In order to solve the above problems of severe heat generation and difficult heat dissipation of the battery, a new battery and a method for manufacturing the battery are needed to accelerate the heat dissipation of the battery.

Disclosure of Invention

The technical scheme of the specification aims to solve the problems of serious battery heating and difficult heat dissipation.

To this end, the present specification provides a novel battery and a method of making a battery. At least one hollow tube is arranged in the battery, penetrates through the battery core and the shell of the battery and is connected with the shell of the battery in a sealing mode. The hollow tube sets up near battery heat concentration area for battery heat concentration area's heat can reach the battery case fast through the hollow tube, thereby accelerates battery heat concentration area's heat dissipation, and simultaneously, the hollow tube also can increase the area of cooling surface, dispels the heat with higher speed, reduces battery temperature, increases battery life.

One aspect of the present disclosure provides a battery, including a casing, a battery cell and at least one hollow tube, wherein the battery cell is accommodated in the casing, and the top of the battery cell is connected to an opening of the casing; and the at least one hollow tube penetrates through the shell and the battery core.

In some embodiments, the at least one hollow tube is sealingly connected to the housing.

In some embodiments, the housing includes at least one mounting hole therethrough, wherein the cross-sectional shape and size of the outer profile of the at least one hollow tube matches the at least one mounting hole.

In some embodiments, the cell comprises at least one through hole penetrating through the cell, wherein a cross-sectional dimension of the at least one through hole is not smaller than a cross-sectional dimension of an outer contour of the at least one hollow tube.

In some embodiments, the distance from the at least one through hole to the cell tab in the height direction of the battery is 1/4-3/4 of the cell height.

In some embodiments, the distance from the center of the battery cell to the at least one through hole in the length direction of the battery is 0-1/4 of the length of the battery cell.

In some embodiments, the ratio of the cross-sectional area of the at least one through-hole to the planar area of the cell is 3% to 10%.

In some embodiments, the battery cell comprises a positive plate, a negative plate and a diaphragm, wherein the diaphragm is arranged between the positive plate and the negative plate; each through hole in the at least one through hole comprises a positive plate through hole, a negative plate through hole and a diaphragm through hole, wherein the cross-sectional size of the diaphragm through hole is smaller than that of the positive plate through hole and that of the negative plate through hole.

In some embodiments, the at least one hollow tube is circular in cross-section.

In some embodiments, the at least one hollow tube is quadrilateral in cross-section.

Another aspect of the present disclosure provides a method for manufacturing a battery, including: manufacturing a battery core of the battery, wherein the battery core comprises at least one through hole which penetrates through the battery core; loading the battery core into a shell of the battery, and connecting the shell with the top of the battery core, wherein the shell comprises at least one mounting hole which penetrates through the shell; penetrating at least one hollow tube through the at least one mounting hole of the casing and the at least one through hole of the battery core; and fixedly connecting the at least one hollow tube with the shell.

In some embodiments, the fabricating the cell of the battery includes: manufacturing at least one positive plate through hole on the positive plate; manufacturing at least one negative plate through hole on the negative plate; manufacturing at least one diaphragm through hole on a diaphragm, wherein the cross-sectional dimension of each diaphragm through hole in the at least one diaphragm through hole is smaller than the cross-sectional dimensions of each positive plate through hole in the at least one positive plate through hole and each negative plate through hole in the at least one negative plate through hole; and alternately stacking the positive plate, the negative plate and the diaphragm to manufacture the battery core, wherein the positive plate and the negative plate are separated by the diaphragm, the distribution positions of the at least one positive plate through hole, the at least one negative plate through hole and the at least one diaphragm through hole are consistent, and the at least one positive plate through hole, the at least one negative plate through hole and the at least one diaphragm through hole form the at least one through hole and penetrate through the battery core.

Other functions of the present application will be partially set forth in the following description. The contents of the following figures and examples will be apparent to those of ordinary skill in the art in view of this description. The inventive aspects of this application can be fully explained by the practice or use of the methods, apparatus and combinations described in the detailed examples below.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present disclosure, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1A shows a schematic structural diagram of a battery provided according to an embodiment of the present description;

FIG. 1B shows a cross-sectional view in the direction A-A of FIG. 1A; and

fig. 2 is a flowchart illustrating a method for manufacturing a battery according to an embodiment of the present disclosure.

Detailed Description

The following description is presented to enable any person skilled in the art to make and use the present description, and is provided in the context of a particular application and its requirements. Various modifications to the disclosed embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other embodiments and applications without departing from the spirit and scope of the present description. Thus, the present description is not limited to the embodiments shown, but is to be accorded the widest scope consistent with the claims.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting. For example, as used herein, the singular forms "a", "an" and "the" may include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprises," "comprising," "includes," and/or "including," when used in this specification, are intended to specify the presence of stated integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. The term "A on B" as used in this specification means that A is either directly adjacent (above or below) B or indirectly adjacent (i.e., separated by some material) to B; the term "A within B" means that A is either entirely within B or partially within B.

These and other features of the present specification, as well as the operation and function of the elements of the structure related thereto, and the combination of parts and economies of manufacture, may be particularly improved upon in view of the following description. Reference is made to the accompanying drawings, all of which form a part of this specification. It is to be expressly understood, however, that the drawings are for the purpose of illustration and description only and are not intended as a definition of the limits of the specification. It should also be understood that the drawings are not drawn to scale.

The present specification provides, on the one hand, a battery and, on the other hand, a method of making a battery. The battery can be a lithium battery, and can also be other batteries, such as a storage battery and the like. The battery can be a square battery, and can also be other batteries, such as a cylindrical battery, a soft package battery and the like. The following description of the present specification will be described, purely for the sake of illustration, with a square lithium battery as an example.

Fig. 1A shows a schematic structural diagram of a battery 100 provided according to an embodiment of the present description. Fig. 1B shows a cross-sectional view in the direction a-a of fig. 1A. For convenience of illustration, the X direction in fig. 1A is defined as the length direction of the battery 100, and the Y direction is defined as the height direction of the battery 100. As shown in fig. 1A and 1B, the battery 100 may include a case 120, a cell 140, and at least one hollow tube 180. The cell 140 may be housed within a cavity of the housing 120. At least one hollow tube 180 extends through the housing 120 and the cell 140.

As shown in fig. 1A and 1B, the housing 120 may be a five-sided closed upper opening housing. The housing 120 may have a rectangular parallelepiped shape or a cylindrical shape. For convenience of illustration, fig. 1A and 1B are illustrated in a rectangular parallelepiped shape. As shown in fig. 1B, the housing 120 may include a sidewall 122, a bottom 124, and at least one mounting hole 128. The side wall 122 and the bottom 124 form a cavity. The cell 140 may be housed within a cavity of the housing 120. The opening of the casing 120 may be hermetically connected to the top of the battery cell 140. The top of the casing 120 and the top of the battery cell 140 may be fixedly connected in a sealing manner by welding, or may be fixedly connected in a sealing manner by other manners. At least one mounting hole 128 extends through the housing. The at least one mounting hole 128 may be used to secure at least one hollow tube 180. The at least one mounting hole 128 is the same number as the at least one hollow tube 180. The number of the at least one mounting hole 128 may be 1, 2, 3, 4, or a plurality thereof. While 1 hollow tube 180 and 1 mounting hole 128 are shown in fig. 1A and 1B, it should be understood by those skilled in the art that more than 1 number of hollow tubes 180 and mounting holes 128 are within the scope of the present disclosure. The cross-sectional shape and size of the outer profile of the at least one hollow tube 180 matches the cross-sectional shape and size of the at least one mounting hole 128 in the housing 120. The at least one mounting hole 128 may be circular, or may be other shapes, such as a quadrilateral, or even other polygonal shapes, such as a pentagon. The mounting hole 128 and the hollow tube 180 shown in fig. 1A and 1B have a circular cross-sectional outer shape, and those skilled in the art will understand that other shapes of the mounting hole 128 and the cross-sectional outer shape of the hollow tube 180 are within the scope of the present disclosure. As described above, during use of the battery 100, the battery cell 140 generates heat, which causes the temperature of the battery 100 to rise. The central region of the battery core 140 of the battery 100 is a heat concentration region, which has slow heat dissipation and obvious temperature rise. Accordingly, at least one mounting hole 128 may be distributed about a central region of the cell 140 to facilitate heat dissipation from the cell 140. The distribution position of the at least one mounting hole 128 coincides with the distribution position of the through holes on the battery cell 120. The distribution position of the at least one mounting hole 128 and the distribution position of the through holes on the battery cell 120 will be described in detail later.

The battery cell 140 is a main body of the battery 100 that charges and discharges. The cell 140 may be housed within a cavity of the housing 120. As shown in fig. 1A and 1B, the battery cell 140 may include a cover plate 142, a tab 144, a core 150, and at least one through hole 160. A cover plate 142 is positioned on top of the cells 140. The cover plate 142 may be sealingly connected to an opening in the upper portion of the casing 120, thereby sealing the cell 140 within the cavity of the casing 120. The tab 144 may connect the core 150 and the cap plate 142. Core 150 is a main body of battery cell 140 for charging and discharging. The core 150 of the cell 140 may include a positive plate 152, a negative plate 154, and a separator 156. The core 150 may be formed by alternately stacking a plurality of positive electrode tabs 152, a plurality of negative electrode tabs 154, and a plurality of separators 156. The separator 156 is disposed between the positive electrode tab 152 and the negative electrode tab 156, and separates the positive electrode tab 152 and the negative electrode tab 154.

The cell 140 may also include at least one through-hole 160. At least one through-hole 160 may extend through the core 150 of the cell 140. At least one hollow tube 180 may pass through the at least one through hole 160 while passing through the housing 120 and the battery cell 140. The number of the at least one through hole 160 is the same as the number of the at least one hollow tube 180 and the at least one mounting hole 128. The number of the at least one through hole 160 may be 1, 2, 3, 4, or a plurality of through holes. While 1 hollow tube 180, 1 and through hole 160 and 1 mounting hole 128 are shown in fig. 1A and 1B, it will be understood by those skilled in the art that more than 1 number of hollow tubes 180, through holes 160 and mounting holes 128 are within the scope of the present disclosure. In order to ensure that the at least one hollow tube 180 can smoothly pass through the at least one through hole 160, the cross-sectional dimension of the at least one through hole 160 is at least equal to (i.e., not smaller than) the cross-sectional dimension of the outer contour of the at least one hollow tube 180. The cross-sectional shape of the at least one through hole 160 may or may not be identical to the cross-sectional shape of the outer contour of the at least one hollow tube 180, as long as it is ensured that the at least one hollow tube 180 can smoothly pass through the at least one through hole 160. The at least one through hole 160 may be circular, or may be other shapes, such as a quadrilateral, or even other polygonal shapes, such as a pentagon. As previously mentioned, the cross-sectional shape and size of the outer profile of the at least one hollow tube 180 matches the cross-sectional shape and size of the at least one mounting hole 128 in the housing 120. Accordingly, the cross-sectional dimension of the at least one through hole 160 is not less than the cross-sectional dimension of the outer profile of the at least one hollow tube 180 and the cross-sectional dimension of the at least one mounting hole 128. For example, when the cross-sectional shapes of the at least one through hole 160, the outer contour of the at least one hollow tube 180, and the at least one mounting hole 128 are circular, the diameter of the at least one through hole 160 may be 0-3mm larger than the outer contour of the at least one hollow tube 180 and the diameter of the at least one mounting hole 128, so as to ensure stable assembly of the at least one hollow tube 180 and safe and reliable battery 100. It should be noted that the larger the cross-sectional dimension of the at least one through hole 160 is than the outer contour dimension of the at least one hollow tube 180 and the cross-sectional dimension of the at least one mounting hole 128, the farther the core 150 of the battery cell 140 is from the at least one hollow tube 180, the poorer the heat dissipation effect. Therefore, to ensure the heat dissipation effect, the cross-sectional dimension of the at least one through hole 160 should not be too different from the outer contour dimension of the at least one hollow tube 180 and the cross-sectional dimension of the at least one mounting hole 128. Of course, 0-3mm is merely exemplary, and those skilled in the art will appreciate that a range of 0-3mm is within the scope of the present disclosure.

Each of the at least one through-hole 160 may include a positive electrode tab through-hole 162, a negative electrode tab through-hole 164, and a separator through-hole 166. As described above, the core body 150 may be formed by alternately stacking a plurality of positive electrode tabs 152, a plurality of negative electrode tabs 154, and a plurality of separators 156. The distribution positions of the positive plate through holes 162, the negative plate through holes 164 and the diaphragm through holes 166 are consistent. When the plurality of positive electrode sheets 152, the plurality of negative electrode sheets 154, and the plurality of separators 156 are stacked alternately to form the core 150, the center positions of the positive electrode sheet through-hole 162, the negative electrode sheet through-hole 164, and the separator through-hole 166 are substantially overlapped to form the through-hole 160. It should be noted that, in order to ensure that the positive and

negative plates

152 and 154 are spaced apart from each other and no short circuit occurs, the cross-sectional size of the through-hole 166 is smaller than the cross-sectional size of the through-

holes

162 and 164, so that when the at least one hollow tube 180 passes through the at least one through-hole 160, the at least one hollow tube 180 contacts the separator 156 and does not contact the positive and

negative plates

152 and 154, and the positive and

negative plates

152 and 154 are not short-circuited by the at least one hollow tube 180. The size of the cross section of the through hole 166 of the diaphragm should be at least 1mm larger than that of the through hole 164 of the negative electrode tab, so as to ensure the safety performance of the battery 100 and prevent the short circuit of the positive electrode tab 152 and the negative electrode tab 154 due to the simultaneous contact with at least one hollow tube 180. During the manufacturing process of the battery cell, it is necessary to ensure that the size of the negative electrode tab 154 is larger than that of the positive electrode tab 152 to ensure that lithium ions can reach the negative electrode tab 154. Therefore, the size of the negative electrode tab through-hole 164 needs to be smaller than the size of the positive electrode tab through-hole 162 to ensure that the size of the negative electrode tab 154 is larger than the size of the positive electrode tab 152. Therefore, in each of the at least one through-hole 160, the size of the positive electrode tab through-hole 162 is greater than that of the negative electrode tab through-hole 164, and the size of the negative electrode tab through-hole 164 is greater than that of the separator through-hole 166. As previously mentioned, the cross-sectional dimension of the at least one through hole 166 is at least not less than the cross-sectional dimension of the outer profile of the at least one hollow tube 180. Thus, the cross-sectional dimension of the diaphragm through hole 166 is at least no less than the cross-sectional dimension of the outer profile of the at least one hollow tube 180.

As mentioned above, the central region of the cell 140 of the battery 100 is a heat concentration region, heat dissipation is slow, and temperature rise is significant, therefore, at least one hollow tube 180, at least one through hole 160, and at least one mounting hole 128 may be distributed near the central region of the cell 140 to accelerate heat dissipation of the cell 140. for convenience of description, in fig. 1A, we define the length of the cell 140 as L, the central axis in fig. 1A is the central position 101 of the cell 140 in the length direction (X direction), in fig. 1B we define the height of the cell 140 as h. we define the distance of the at least one through hole 160 from the tab 144 of the cell 140 as Y, we define the distance of the at least one through hole 160 from the central position 101 of the cell 140 as X. in some embodiments, the distance Y of the at least one through hole 160 from the tab 144 of the cell 140 in the height direction (Y direction) of the battery 100 may be the height of the cell 140 as Y56-3/4, i.e., Y (1/4-3/4) h. in some embodiments, at least one through hole 160 may be a central region 180, and at least one through hole 160 may be distributed at least one through hole 160 in the central region 180, and at least one through hole 160 may be distributed in the central region 180, when the heat dissipation region a — 2, the heat dissipation region a, the heat dissipation region 180 is a — 2, the heat dissipation region 180, the heat dissipation region a, the heat dissipation region 180, fig. 1, the heat dissipation region 180 is not shown as X is a, the heat dissipation region 180, the heat dissipation area is a, the heat dissipation area 180, the heat dissipation area is a, the heat dissipation area 180, fig. 1, the heat dissipation area is a, the heat dissipation area 180 is a — 2, the heat dissipation area is a, the heat dissipation area 180, the heat dissipation area is a, the.

In some embodiments, the ratio of the cross-sectional area of the at least one through hole 160 to the planar area a of the battery cell 140 is 3% to 10%. the planar area a of the battery cell 140 is L · h. the cross-sectional area of the at least one through hole 160 may be the sum of the areas of the negative plate through holes 164, the sum of the areas of the positive plate through holes 162, or the average of the sum of the areas of the negative plate through holes 164 and the sum of the areas of the positive plate through holes 162. the larger the cross-sectional area of the at least one through hole 160, the better the heat dissipation effect, but the lower the energy density of the battery.

The battery 100 may include at least one hollow tube 180. At least one hollow tube 180 may be fixedly connected to the housing 120. At least one hollow tube 180 passes through the at least one mounting hole 128 and the at least one through hole 160, thereby penetrating the battery cell 140 and the battery case 120. As described above, during use of the battery 100, the battery cell 140 generates heat, which causes the temperature of the battery 100 to rise. When the battery 100 generates heat, the heat may be rapidly transferred to the case 120 through the at least one hollow tube 180, thereby accelerating heat dissipation of the battery cell 140. Meanwhile, the battery cell 140 may transfer heat to the at least one hollow tube 180, and the surface of the at least one hollow tube 180 is in contact with air, so that the heat dissipation area may be increased, and the heat dissipation is accelerated. In addition, at least one hollow tube 180 may pass through the at least one through hole 160, and thus, the at least one hollow tube 180 may function to support the battery cell 140. When the battery 100 is impacted, the battery core 140 may be subjected to a large impact, and the at least one hollow tube 180 may enhance the structural strength of the casing 120 and protect the casing 120 from collapsing, thereby preventing the casing 120 from collapsing and deforming to damage the battery core. Accordingly, the at least one hollow tube 180 may enhance the overall structural strength of the battery 100, enhancing the shock resistance of the battery 100.

The number of the at least one hollow tube 180 is the same as the number of the at least one mounting hole 128 and the at least one through hole 160. The number of the at least one hollow tube 180, the at least one mounting hole 128 and the at least one through hole 160 may be 1, 2, 3, 4, or more, of course. Both ends of at least one hollow tube 180 may be fixedly connected with the housing 120. The fixed connection may be a sealed connection. That is, two ends of at least one hollow tube 180 are hermetically connected to at least one mounting hole 128 of the casing 120 by welding, so that the battery cell 140 is sealed inside the cavity of the casing 120, and electric leakage is avoided. For example, the at least one hollow tube 180 and the housing 120 may be integrally welded by laser. In order to secure the sealing effect and improve the safety of the battery 100, the at least one hollow tube 180 has an outer sectional shape and size matched with the sectional shape and size of the at least one mounting hole 128 of the case 120. The at least one hollow tube 180 has an outer profile cross-sectional dimension that substantially corresponds to the cross-sectional dimension of the at least one mounting hole 128. In order to ensure that the at least one hollow tube 180 can smoothly pass through the at least one through hole 160, the cross-sectional dimension of the at least one through hole 160 is at least equal to or greater than the cross-sectional dimension of the at least one hollow tube 180. The cross-sectional shape of the outer contour of the at least one hollow tube 180 and the cross-sectional shape of the at least one mounting hole 128 may be circular, or may be other shapes, such as a quadrilateral, or even other polygonal shapes, such as a pentagon.

The at least one hollow tube 180 may be made of a metal material, such as an aluminum alloy, a steel material, etc. When at least one of the hollow tubes 180 is made of steel, in order to extend the service life of the battery 100, the junction of the at least one hollow tube 180 and the at least one mounting hole 128 may be subjected to an anti-rust treatment, such as nickel plating, or the like. In order to ensure that the at least one hollow tube 180 and the housing 120 are welded reliably and sealed well, the wall thickness of the at least one hollow tube 180 may be chosen to be any size between 0.2mm and 2 mm. The wall thickness is too small, the strength of at least one hollow tube 180 is not enough, the hollow tube is easy to deform, and the sealing performance is poor during welding; the wall thickness is too large and the welding effect is poor, and the surface area of the inner contour of the at least one hollow tube 180 will be small and the heat dissipation effect will be poor. It should be noted that the size of the outer contour of at least one hollow tube 180 and the overall size of the battery 100 are different, and the wall thickness of at least one hollow tube 180 may also be selected to be different. For example, as the overall size of the battery 100 increases, the wall thickness of the at least one hollow tube 180 may be increased appropriately. For another example, when the size of the outer contour of the at least one hollow tube 180 is reduced, the wall thickness of the at least one hollow tube 180 may also be reduced appropriately. It will be understood by those skilled in the art that wall thickness dimensions other than 0.2mm to 2mm are within the scope of the present disclosure.

To sum up, the battery 100 provided in this specification includes at least one hollow tube 180, which penetrates through the battery cell 140 and the casing 120, so as to accelerate heat dissipation of the battery cell 140, reduce the temperature of the battery 100, prolong the cycle life of the battery 100, enhance the strength of the casing 120, and improve the impact resistance of the battery 100.

Another aspect of the present disclosure provides a method P200 for manufacturing the battery 100. Fig. 2 shows a flowchart of a method P200 for manufacturing the battery 100 according to an embodiment of the present disclosure. As shown in fig. 2, method P200 may include:

s220: the cell 140 of the battery 100 is manufactured.

As previously described, the cell 140 may include a cover plate 142, tabs 144, a core 150, and at least one through-hole 160. The core body 150 may include a positive electrode tab 152, a negative electrode tab 154, and a separator 156. And at least one through hole 160 penetrating through the core 150 of the cell 140. Step S220 may include:

s222: at least one positive electrode tab through hole 162 is made in the positive electrode tab 152.

Specifically, the step S222 may include coating the positive electrode material, drying and rolling to obtain the positive electrode sheet 152, punching the positive electrode sheet 152 to obtain at least one positive electrode sheet through hole 162, and finally die-cutting to obtain the positive electrode sheet 152 with a size suitable for the battery cell 140.

S224: at least one negative electrode tab through-hole 164 is formed on the negative electrode tab 154.

Specifically, step S224 may include coating the negative electrode material, drying and rolling to obtain the negative electrode sheet 154, punching the negative electrode sheet 154 to obtain at least one negative electrode sheet through hole 164, and finally performing die cutting to obtain the negative electrode sheet 154 with a size suitable for the battery cell 140.

S226: at least one diaphragm through hole 166 is made in the diaphragm 156.

Specifically, step S224 may include punching the diaphragm 156 to obtain at least one diaphragm through hole 166, and drying to obtain the diaphragm 156 of the battery cell 140. Wherein the cross-sectional dimension of each of the at least one separator through-hole 166 is smaller than the cross-sectional dimension of each of the at least one positive electrode tab through-hole 162 and each of the at least one negative electrode tab through-hole 164.

S228: the positive electrode sheet 152, the negative electrode sheet 154, and the separator 156 are alternately stacked to fabricate the battery cell 140.

The positive electrode tab 152, the negative electrode tab 154, and the separator 156 are fabricated into the core 150 of the battery cell 140 by a lamination process. The positive electrode tab 152 and the negative electrode tab 154 are separated by a separator 166. The at least one positive electrode tab through hole 162, the at least one negative electrode tab through hole 164 and the at least one separator through hole 166 are distributed at the same position. The at least one positive electrode tab through-hole 162, the at least one negative electrode tab through-hole 164, and the at least one separator through-hole 166 form at least one through-hole 160 that penetrates the cell 140.

After the core 150 is manufactured, the core 150 needs to be connected to the cover plate 142. Specifically, the tab 144 of the coupling core 150 is fixedly coupled to the cover plate 142. The fixed connection may be a weld.

S240: the battery cell 140 is loaded into the case 120 of the battery 100, and the case 120 is coupled to the top of the battery cell 140.

The battery cell 140 is thick after being manufactured, and the battery cell 140 needs to be accommodated in the cavity of the casing 120. Specifically, the core 150 of the battery cell 140 is accommodated in the cavity of the casing 120, and the cover plate 142 on the top of the battery cell 140 is hermetically connected to the opening of the casing 120. It should be noted that the housing 120 includes at least one mounting hole 128 extending through the housing 120. The distribution position of the at least one mounting hole 128 coincides with the distribution position of the at least one through hole 160.

S260: at least one hollow tube 180 is inserted through at least one mounting hole 128 of housing 120 and at least one through hole 160 of cell 140.

S280: at least one hollow tube 180 is fixedly connected to the housing 120.

After the battery cell 140 is mounted to the housing 120, the at least one hollow tube 180 is inserted into the at least one mounting hole 128 and the at least one through hole 160, so that the at least one hollow tube 180 penetrates through the housing 120 and the battery cell 140. At least one hollow tube 180 is then fixedly attached to the housing 120. The fixed connection may be a seal weld.

In summary, the present specification provides a battery 100 and a method P200 for manufacturing the battery 100, in which at least one hollow tube 180 penetrates through the core 140 and the casing 120 of the battery 100 and is hermetically connected to the casing 120 of the battery 100. The at least one hollow tube 180 is disposed near the heat concentration region of the battery 100, so that the heat in the heat concentration region of the battery 100 can rapidly reach the housing 120 of the battery 100 through the at least one hollow tube 180, thereby accelerating the heat dissipation of the heat concentration region of the battery 100, and meanwhile, the at least one hollow tube 180 can also increase the area of a heat dissipation surface, accelerate the heat dissipation, reduce the temperature of the battery, and increase the service life of the battery. In addition, the at least one hollow tube 180 may also enhance the strength of the housing 120, improve the shock resistance of the battery 100, and extend the service life of the battery 100.

In conclusion, upon reading the present detailed disclosure, those skilled in the art will appreciate that the foregoing detailed disclosure can be presented by way of example only, and not limitation. Those skilled in the art will appreciate that the present description is intended to cover various reasonable changes, adaptations, and modifications of the embodiments described herein, although not explicitly described herein. Such alterations, improvements, and modifications are intended to be suggested by this specification, and are within the spirit and scope of the exemplary embodiments of this specification.

Furthermore, certain terminology has been used in this specification to describe embodiments of the specification. For example, "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the specification. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various portions of this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined as suitable in one or more embodiments of the specification.

It should be appreciated that in the foregoing description of embodiments of the specification, various features are grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the specification, for the purpose of aiding in the understanding of one feature. This is not to be taken as an admission that any of the features are required in combination, and it is fully possible for one skilled in the art to extract some of the features as separate embodiments when reading this specification. That is, embodiments in this specification may also be understood as an integration of a plurality of sub-embodiments. And each sub-embodiment described herein is equally applicable to less than all features of a single foregoing disclosed embodiment.

Each patent, patent application, publication of a patent application, and other material, such as articles, books, descriptions, publications, documents, articles, and the like, cited herein is hereby incorporated by reference. All matters hithertofore set forth herein except as related to any prosecution history, may be inconsistent or conflicting with this document or any prosecution history which may have a limiting effect on the broadest scope of the claims. Now or later associated with this document. For example, if there is any inconsistency or conflict in the description, definition, and/or use of terms associated with any of the included materials with respect to the terms, descriptions, definitions, and/or uses associated with this document, the terms in this document are used.

Finally, it should be understood that the embodiments of the application disclosed herein are illustrative of the principles of the embodiments of the present specification. Other modified embodiments are also within the scope of this description. Accordingly, the disclosed embodiments are to be considered in all respects as illustrative and not restrictive. Those skilled in the art may implement the applications in this specification in alternative configurations according to the embodiments in this specification. Therefore, the embodiments of the present description are not limited to the embodiments described precisely in the application.

Claims

1. A battery, comprising:

a housing;

the battery cell is accommodated in the shell, and the top of the battery cell is connected with the opening of the shell; and

at least one hollow tube running through the shell and the cell.

2. The battery of claim 1, wherein the at least one hollow tube is sealingly connected to the housing.

3. The battery of claim 1, wherein the housing includes at least one mounting hole therethrough,

wherein the cross-sectional shape and size of the outer profile of the at least one hollow tube matches the at least one mounting hole.

4. The battery of claim 1, wherein the cell comprises at least one through-hole extending through the cell,

wherein the cross-sectional dimension of the at least one through hole is not smaller than the cross-sectional dimension of the outer contour of the at least one hollow tube.

5. The battery of claim 4, wherein the at least one through hole is separated from the cell tab by a distance of 1/4-3/4 of the cell height in a height direction of the battery.

6. The battery of claim 4, wherein the at least one through hole is located at a distance of 0-1/4 a length of the cell from a center position of the cell in a length direction of the battery.

7. The battery of claim 4, wherein a ratio of a cross-sectional area of the at least one through-hole to a planar area of the cell is between 3% and 10%.

8. The battery of claim 4,

the battery cell comprises:

a positive plate;

a negative plate; and

the diaphragm is arranged between the positive plate and the negative plate; each of the at least one via includes:

a positive plate through hole;

a negative plate through hole; and

a through hole of the diaphragm is arranged on the diaphragm,

the cross-sectional size of the diaphragm through hole is smaller than that of the positive plate through hole and that of the negative plate through hole.

9. The battery of claim 1, wherein the at least one hollow tube is circular in cross-section.

10. The battery of claim 1, wherein the at least one hollow tube is quadrilateral in cross-section.

11. A method of making a battery, comprising:

manufacturing a battery core of the battery, wherein the battery core comprises at least one through hole which penetrates through the battery core;

loading the battery core into a shell of the battery, and connecting the shell with the top of the battery core, wherein the shell comprises at least one mounting hole which penetrates through the shell;

penetrating at least one hollow tube through the at least one mounting hole of the casing and the at least one through hole of the battery core; and

and fixedly connecting the at least one hollow tube with the shell.

12. The method of making a battery of claim 11, wherein making the cell of the battery comprises:

manufacturing at least one positive plate through hole on the positive plate;

manufacturing at least one negative plate through hole on the negative plate;

manufacturing at least one diaphragm through hole on a diaphragm, wherein the cross-sectional dimension of each diaphragm through hole in the at least one diaphragm through hole is smaller than the cross-sectional dimensions of each positive plate through hole in the at least one positive plate through hole and each negative plate through hole in the at least one negative plate through hole; and

the positive plate, the negative plate and the diaphragm are alternately stacked to manufacture a battery core, the positive plate and the negative plate are separated by the diaphragm,

the distribution positions of the at least one positive plate through hole, the at least one negative plate through hole and the at least one diaphragm through hole are consistent, and the at least one positive plate through hole, the at least one negative plate through hole and the at least one diaphragm through hole form the at least one through hole and penetrate through the battery core.