Single battery and battery pack

Abstract

The utility model provides a single battery and a battery pack, and relates to the technical field of batteries. The single battery comprises a shell provided with a shell, a first end cover and a second end cover, a battery cell arranged in the shell, a pole connected with the first end cover through a first insulating part, and a heat exchange column connected with the pole through a second insulating part. The pole penetrates through the first cover hole of the first end cover, the battery cell is electrically connected with the pole, the end, away from the first end cover, of the heat exchange column is connected with the second end cover, and the heat exchange column penetrates through the through hole of the battery cell and the pole hole of the pole and is provided with a heat exchange channel used for containing a heat exchange medium. According to the single battery provided by the invention, on one hand, the risks of welding quality problems, shell deformation and short circuit are reduced, and the yield is improved, and on the other hand, heat of the battery cell and the pole can be conducted out, so that the use performance is favorably maintained, and the risk of thermal runaway is reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a single cell and a battery pack. Background Art

[0002] A single cell generally includes a shell, a pole disposed at the end of the shell, and a battery cell disposed inside the shell. Currently, the temperature of the single cell is mainly reduced or increased by disposing a heat conduction component on the shell, but the heat transfer effect of this method is not good. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a single cell battery and a battery pack, aiming to solve the technical problem of poor thermal management effect of single cell batteries.

[0004] To achieve the above objectives, the technical solutions adopted in this application are as follows:

[0005] In a first aspect, an embodiment of the present application provides a single cell, comprising:

[0006] The housing comprises a shell, a first end cover and a second end cover, the shell having a receiving cavity and a first opening, the first opening being in communication with the receiving cavity, the first end cover being arranged at one end of the shell, the second end cover being arranged at the other end of the shell away from the first end cover and connected to the shell to close the first opening, and the first end cover being provided with a penetrating first cover hole;

[0007] A battery core is disposed in the accommodating cavity and has a height direction, and a through hole extending in the height direction is disposed on the battery core;

[0008] A first insulating member, disposed on the first end cover;

[0009] A pole, which is passed through the first cover hole and connected to the first end cover through the first insulating member, the pole is electrically connected to an end of the battery cell away from the second end cover, and a pole hole is provided on the pole, and the pole hole is communicated with the accommodating cavity;

[0010] A second insulating member, at least partially disposed in the pole hole and connected to the hole wall of the pole hole, and provided with a first connecting hole, wherein the first connecting hole is communicated with the accommodating cavity;

[0011] A heat exchange column is passed through the through hole, one end of the heat exchange column away from the first end cover is connected to the second end cover, and the heat exchange column is provided with a heat exchange channel for accommodating a heat exchange medium, and one end of the heat exchange column away from the second end cover is passed through the first connecting hole.

[0012] In one embodiment of the first aspect, the outer circumference of the second insulating member abuts against the hole wall of the pole hole, and the hole wall of the first connecting hole abuts against the outer circumference of the heat exchange column.

[0013] In one embodiment of the first aspect, the heat exchange column includes a column and a base connected to each other, the column and the base together define the heat exchange channel, the second end cover is provided with a second cover hole penetrating therethrough, the column is respectively penetrated through the second cover hole and the through hole, the hole wall of the first connecting hole abuts against the outer peripheral side of the column, and the base is located on the side of the second end cover away from the battery cell, and is connected to the second end cover.

[0014] In one embodiment of the first aspect, the second end cover includes a cover body and an annular boss, the cover body is provided with the second cover hole, the base is located on a side of the cover body away from the battery cell and is connected to the cover body, the annular boss is provided on a side of the cover body away from the battery cell and is connected to a side of the shell having the first opening, and a side of the base away from the column, a side of the annular boss away from the cover body and a side of the shell having the first opening are provided flush.

[0015] In one embodiment of the first aspect, an annular groove is provided along a portion of the outer circumference of the column, and the annular groove is provided close to the pole.

[0016] In one embodiment of the first aspect, the pole includes a pole body and a first pole boss and a second pole boss respectively connected to the outer peripheral side of the pole body, the pole body is provided with the pole hole, and the pole body is penetrated by the first cover hole and is electrically connected to an end of the battery cell away from the second end cover, the first pole boss is located on the side of the first end cover away from the battery cell, and the second pole boss is located on the side of the first end cover close to the battery cell, the first insulating member includes an insulator and a first insulating boss and a second insulating boss respectively connected to the outer peripheral side of the insulator, the insulator is provided with a penetrating second connecting hole, and is sleeved on the outer peripheral side of the pole body through the second connecting hole, the hole wall of the first cover hole abuts against the outer peripheral side of the insulator, the first insulating boss abuts between the first pole boss and the first end cover, and the second insulating boss abuts between the second pole boss and the first end cover.

[0017] In one embodiment of the first aspect, a first step surface is provided on the outer circumference of the second insulating member, a second step surface is provided on the hole wall of the pole hole, and the first step surface and the second step surface are in contact with each other.

[0018] In one embodiment of the first aspect, a first inclined surface is provided on the outer peripheral side of the second insulating member, a second inclined surface is provided on the hole wall of the pole hole, and the first inclined surface and the second inclined surface are in contact with each other.

[0019] In one embodiment of the first aspect, the heat exchange column passes through the second end cover, and through openings are provided at both ends of the heat exchange column, and each of the through openings is communicated with the heat exchange channel.

[0020] In one embodiment of the first aspect, the single cell battery further includes a first current collecting plate and a second current collecting plate arranged in the accommodating cavity, the first current collecting plate being electrically connected to a side of the battery cell away from the second end cover and a side of the pole close to the battery cell, respectively, the second current collecting plate being electrically connected to a side of the battery cell away from the first end cover and a side of the second end cover close to the first end cover, the first current collecting plate being provided with a first avoidance hole penetrating therethrough, the second current collecting plate being provided with a second avoidance hole penetrating therethrough, the heat exchange columns being respectively penetrated through the first avoidance hole and the second avoidance hole, and a gap is provided between the hole wall of the first avoidance hole and the outer peripheral side of the heat exchange column, and a gap is provided between the hole wall of the second avoidance hole and the outer peripheral side of the heat exchange column.

[0021] In a second aspect, an embodiment of the present application further provides a battery pack, comprising a single cell as described in any of the above embodiments.

[0022] The beneficial effects of this application are:

[0023] In the single cell provided by the present application, a heat exchange column is added in the housing cavity of the shell, the heat exchange column is arranged in the through hole of the battery cell, and the end of the heat exchange column away from the first end cover is connected to the second end cover, and the end of the heat exchange column away from the second end cover is connected to the pole through the second insulating member, so that the heat exchange column can limit the radial shaking of the battery cell in the housing cavity, and play a role in supporting the pole and the second end cover, so that the structure of the single cell is more stable, on this basis, the pole is connected to the first end cover through the first insulating member, so as to achieve insulation between the pole and the first end cover, and the heat exchange column is connected to the pole through the second insulating member, so as to achieve insulation between the heat exchange column and the pole, thereby reducing the risk of short circuit in the single cell. The above structure effectively reduces the possibility of welding quality problems and shell deformation, and also reduces the risk of short circuit, thereby effectively improving the yield of the single cell. At the same time, the heat exchange column is provided with a heat exchange channel for accommodating heat exchange medium. The heat exchange column is respectively inserted into the through hole of the battery cell and the pole hole of the pole. When the battery cell and the pole generate heat, the heat will be transferred to the heat exchange column, thereby heat exchange occurs with the heat exchange medium in the heat exchange channel, which is beneficial to maintain the performance of the single battery and reduce the risk of thermal runaway.

[0024] In order to make the above-mentioned objects, features and advantages of the present application more obvious and understandable, preferred embodiments are given below and described in detail with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0026] Figure 1 A schematic diagram of the three-dimensional structure of a single battery in some embodiments of the present application is shown;

[0027] Figure 2 A schematic diagram of the structure of a single cell in some embodiments of the present application is shown;

[0028] Figure 3 Shows Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0029] Figure 4 Shows Figure 2 A schematic diagram of a partial cross-section structure at AA in the middle;

[0030] Figure 5 Shows Figure 2 Another partial cross-sectional structural schematic diagram at AA in the middle;

[0031] Figure 6 A partial cross-sectional structure schematic diagram of a single cell in some other embodiments of the present application is shown;

[0032] Figure 7 A schematic diagram of the cross-sectional structure of a battery cell in some embodiments of the present application is shown;

[0033] Figure 8 A schematic diagram of the cross-sectional structure of a heat exchange column in some embodiments of the present application is shown;

[0034] Fig. 9 A schematic cross-sectional structure diagram of the second end cover in some embodiments of the present application is shown;

[0035] Fig.10 A schematic diagram of the cross-sectional structure of the housing after removing the second end cover in some embodiments of the present application is shown;

[0036] Fig.11 A schematic diagram of the cross-sectional structure of a pole in some embodiments of the present application is shown;

[0037] Fig.12A schematic cross-sectional structure diagram of a first insulating member in some embodiments of the present application is shown;

[0038] Fig.13 A schematic cross-sectional structure diagram of a second insulating member in some embodiments of the present application is shown;

[0039] Fig.14 A schematic structural diagram of a single cell from one perspective in some other embodiments of the present application is shown;

[0040] Fig.15 Shows Fig.14 Schematic diagram of the cross-sectional structure at BB in the middle;

[0041] Fig.16 The cross-sectional structure schematic diagram of the heat exchange column in other embodiments of the present application is shown.

[0042] Description of main component symbols:

[0043] 100-monocell; 110-housing; 111-housing; 1111-accommodating chamber; 1112-second opening; 1113-first opening; 112-first end cover; 1121-first cover hole; 113-second end cover; 1131-cover body; 11311-second cover hole; 11312-notched groove; 1132-annular boss; 120-cell; 121-through hole; 130-pole; 131-pole body; 1311-pole hole; 1312-second step surface; 1313-second inclined surface; 132-first pole boss; 133-second pole boss; 14 0-first insulating member; 141-insulator; 1411-second connecting hole; 142-first insulating boss; 143-second insulating boss; 150-heat exchange column; 151-column; 1511-annular groove; 1512-fourth inclined surface; 1513-heat exchange channel; 1514-through opening; 152-base; 160-second insulating member; 161-first connecting hole; 162-first step surface; 163-first inclined surface; 164-third inclined surface; 170-first collecting plate; 171-first avoidance hole; 180-second collecting plate; 181-second avoidance hole; z-height direction. DETAILED DESCRIPTION

[0044] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0045] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0046] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0047] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0048] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0049] A single cell usually includes a shell, a pole arranged at the end of the shell, and a cell arranged inside the shell. In order to prevent the cell from shaking radially inside the shell, there are usually two measures: First, strengthen the welding reliability between the cell and the shell and the pole, but this will increase the risk of over-welding and cold welding. Second, increase the radial size of the cell to make the cell contact more closely with the inner wall of the shell, but the close contact between the cell and the inner wall of the shell increases the risk of deformation of the shell. Both of the above measures will reduce the yield of single cells.

[0050] In addition, in order to prevent the temperature inside the single cell from rising sharply, thereby affecting the performance and increasing the risk of thermal runaway, a liquid cooling plate is usually attached to the outer wall of the single cell, or an air duct is set around the single cell. However, since both of the above methods use a heat exchange medium to exchange heat with the outer surface of the single cell, the temperature reduction is small and the cooling effect on the single cell is limited.

[0051] In order to solve the above technical problems, in the first aspect, the embodiments of the present application provide a single cell 100, which relates to the field of battery technology and is mainly used in a battery pack. Of course, the single cell 100 can also be directly used in electric vehicles, energy storage power stations, ships, spacecraft and other electrical devices without using a battery pack.

[0052] like Figures 1 to 3 As shown, the single cell 100 provided in this embodiment includes: a housing 110 , a battery cell 120 , a first insulating member 140 , a pole 130 , a second insulating member 160 and a heat exchange column 150 .

[0053] Combination Figure 3 , Figure 7 and 10 As shown, the housing 110 includes a housing 111, a first end cover 112 and a second end cover 113. The housing 111 has a receiving cavity 1111 and a first opening 1113. The first opening 1113 is connected to the receiving cavity 1111. The first end cover 112 is arranged at one end of the housing 111. The second end cover 113 is arranged at the other end of the housing 111 away from the first end cover 112 and connected to the housing 111 to close the first opening 1113. The first end cover 112 is provided with a first cover hole 1121 that penetrates through. The battery cell 120 is arranged in the receiving cavity 1111 and has a height direction z. The battery cell 120 is provided with a through hole 121 that extends in the height direction z. The first insulating member 140 is arranged on the first end cover 112. The pole 130 is arranged through the first cover hole 1121 and is connected to the first end cover 112 through the first insulating member 140. The pole 130 is electrically connected to one end of the battery cell 120 away from the second end cover 113.

[0054] Recombination Fig.11 and Fig.13As shown, the pole 130 is provided with a pole hole 1311, and the pole hole 1311 is communicated with the accommodating chamber 1111. The second insulating member 160 is provided through the pole hole 1311, and at least part of the second insulating member 160 is provided in the pole hole 1311 and connected to the hole wall of the pole hole 1311, and a first connecting hole 161 is provided, and the first connecting hole 161 is communicated with the accommodating chamber 1111. The heat exchange column 150 is provided through the through hole 121, and one end of the heat exchange column 150 away from the first end cover 112 is connected to the second end cover 113, and the heat exchange column 150 is provided with a heat exchange channel 1513 for accommodating a heat exchange medium, and one end of the heat exchange column 150 away from the second end cover 113 is provided through the first connecting hole 161.

[0055] For example, the heat exchange medium may be a liquid or a gas, such as water, ethylene glycol aqueous solution, air, oil, refrigerant, etc. These media can exchange heat with the battery cell 120 and the pole 130, thereby achieving the effect of reducing the temperature of the single battery 100. The type of heat exchange medium is not specifically limited here. Figure 2 and Figure 8 As shown, the heat exchange channel 1513 can be cylindrical. Of course, as shown in FIG. Fig.14 and Fig.16 As shown, the heat exchange channel 1513 may also be in the shape of a prism, such as a hexagonal prism, a pentagonal prism, a quadrangular prism, etc., and no specific limitation is made to the shape of the heat exchange channel 1513 herein.

[0056] It should be noted that the battery cell 120 can be made by a winding process. Specifically, the positive electrode sheet, the negative electrode sheet and the separator are wound together by the winding needle of the winding machine to form a winding core. After the winding is completed, the winding core is taken out from the winding needle to form the above-mentioned through hole 121. Of course, the battery cell 120 can also be made by a cutting and stacking process. Specifically, holes are punched in the positive electrode sheet, the negative electrode sheet and the separator in advance, and then the positive electrode sheet, the negative electrode sheet and the separator are stacked to form the battery cell 120. At this time, the hole positions of the positive electrode sheet, the hole positions of the negative electrode sheet and the hole positions of the separator are aligned and connected to form the through hole 121. The type of the battery cell 120 is not specifically limited here.

[0057] In addition, the pole 130 is connected to the first end cover 112 through the first insulating member 140, thereby achieving insulation between the pole 130 and the first end cover 112. The second insulating member 160 is connected to the hole wall of the pole hole 1311, and the end of the heat exchange column 150 away from the second end cover 113 is penetrated through the first connecting hole 161, thereby achieving connection between the heat exchange column 150 and the pole 130 through the second insulating member 160.

[0058] It can be understood that in the single battery 100 provided in this embodiment, since a heat exchange column 150 is added to the accommodating cavity 1111 of the shell 111, the heat exchange column 150 is penetrated through the through hole 121 of the battery cell 120, and the end of the heat exchange column 150 away from the first end cover 112 is connected to the second end cover 113, and the end of the heat exchange column 150 away from the second end cover 113 is connected to the pole 130, so that the heat exchange column 150 can limit the radial shaking of the battery cell 120 in the accommodating cavity 1111. , and plays a role in supporting the pole 130 and the second end cover 113, making the structure of the single battery 100 more stable. On this basis, the pole 130 is connected to the first end cover 112 through the first insulating member 140, realizing the insulation between the pole 130 and the first end cover 112, and the heat exchange column 150 is connected to the pole 130 through the second insulating member 160, realizing the insulation between the heat exchange column 150 and the pole 130, thereby reducing the risk of short circuit in the single battery 100. As a result, the possibility of welding quality problems and deformation of the shell 110 is effectively reduced, and the risk of short circuit is also reduced, thereby effectively improving the yield of the single battery 100.

[0059] At the same time, since a heat exchange channel 1513 for accommodating a heat exchange medium is provided on the heat exchange column 150, by respectively passing the heat exchange column 150 through the through hole 121 of the battery cell 120 and the pole hole 1311 of the pole 130, when the battery cell 120 and the pole 130 generate heat, the heat will be transferred to the heat exchange column 150, thereby heat exchange occurs with the heat exchange medium in the heat exchange channel 1513, which is beneficial to maintaining the performance of the single battery 100 and reducing the risk of thermal runaway.

[0060] like Figure 3 and Fig.10 As shown, in one embodiment, the shell 111 also has a second opening 1112 connected to the accommodating cavity 1111, the first end cover 112 is connected to the shell 111 to close the second opening 1112, the second end cover 113 is electrically connected to the end of the battery cell 120 away from the first end cover 112, and serves as the negative electrode of the single battery 100, and the pole 130 is electrically connected to the end of the battery cell 120 away from the second end cover 113, and serves as the positive electrode of the single battery 100.

[0061] like Figure 3 , Fig.11 and Fig.13 As shown, in one embodiment, the outer circumference of the second insulating member 160 abuts against the hole wall of the pole hole 1311 , and the hole wall of the first connecting hole 161 abuts against the outer circumference of the heat exchange column 150 .

[0062] In this embodiment, since the end of the heat exchange column 150 away from the second end cover 113 is passed through the first connecting hole 161, and the outer peripheral side of the second insulating member 160 abuts against the hole wall of the pole hole 1311, the hole wall of the first connecting hole 161 abuts against the outer peripheral side of the heat exchange column 150, thereby more effectively achieving insulation between the heat exchange column 150 and the pole 130.

[0063] like Figure 5 , Figure 8 and Fig. 9 As shown, in one embodiment, the heat exchange column 150 includes a column 151 and a base 152 connected to each other, the column 151 and the base 152 jointly define a heat exchange channel 1513, the second end cover 113 is provided with a penetrating second cover hole 11311, the column 151 is respectively penetrated through the second cover hole 11311 and the through hole 121, the hole wall of the first connecting hole 161 abuts against the outer peripheral side of the column 151, and the base 152 is located on the side of the second end cover 113 away from the battery cell 120, and is connected to the second end cover 113.

[0064] Exemplarily, the base 152 can be welded to the side of the second end cover 113 facing away from the battery cell 120, or a buckle is provided on the side of the base 152 facing the second end cover 113, and a slot is provided on the side of the second end cover 113 facing away from the battery cell 120, and the base 152 can also be connected to the second end cover 113 by snapping the buckle into the slot.

[0065] In this embodiment, since the second end cover 113 is provided with a penetrating second cover hole 11311, the column 151 is respectively provided in the second cover hole 11311 and the through hole 121, and the base 152 is located on the side of the second end cover 113 away from the battery cell 120 and connected to the second end cover 113. On this basis, the column 151 is connected to the pole 130 through the second insulating member 160, so that the heat exchange column 150 is stably installed between the pole 130 and the second end cover 113, so that the heat exchange column 150 can better limit the shaking of the battery cell 120 relative to the housing 110, and can stably support the pole 130 and the second end cover 113. As a result, the structure of the single battery 100 is more stable.

[0066] like Fig. 9 As shown, further, the second end cover 113 includes a cover body 1131 and an annular boss 1132, the cover body 1131 is provided with a second cover hole 11311, the base 152 is located on the side of the cover body 1131 away from the battery cell 120, and is connected to the cover body 1131, the annular boss 1132 is arranged on the side of the cover body 1131 away from the battery cell 120, and is connected to the side of the shell 111 having the first opening 1113, and the side of the base 152 away from the column 151, the side of the annular boss 1132 away from the cover body 1131 and the side of the shell 111 having the first opening 1113 are arranged flush.

[0067] In this embodiment, since the annular boss 1132 is provided in the second end cover 113, the stability of the single battery 100 when placed vertically is improved by arranging the side of the base 152 away from the column 151, the side of the annular boss 1132 away from the cover 1131 and the side of the shell 111 with the first opening 1113 to be flush, so as to facilitate the subsequent arrangement of multiple single batteries 100 to form a battery module. At the same time, after the second end cover 113 is installed at the first opening 1113, the annular boss 1132 can be welded to the side of the shell 111 with the first opening 1113 to achieve the connection between the second end cover 113 and the shell 111.

[0068] like Figures 14 to 16 As shown, further, an annular groove 1511 is provided along the outer circumference of a portion of the column 151 , and the annular groove 1511 is provided close to the pole 130 .

[0069] In this embodiment, by setting an annular groove 1511 locally on the column 151, the contact area between the column 151 and the battery cell 120 can be reduced, thereby improving the phenomenon of excessive extrusion between the column 151 and the battery cell 120 to a certain extent. In this way, when installing the heat exchange column 150, it is easier to pass the column 151 through the through hole 121, thereby increasing the assembly efficiency of the single battery 100.

[0070] like Figure 5 and Fig. 9 As shown, further, a notch groove 11312 is provided on the outer peripheral side of the base 152 on the side of the cover 1131 away from the battery cell 120 .

[0071] In this embodiment, the position where the notch groove 11312 of the cover body 1131 is a weak area. When the gas pressure in the accommodating cavity 1111 is too high, the high-pressure gas will squeeze and break through the weak area, thereby evacuating the high-pressure gas inside the single battery 100 to the outside, thereby reducing the risk of safety accidents.

[0072] In another embodiment, the base 152 is eliminated from the heat exchange column 150, and only the column 151 is retained. One end of the column 151 is connected to the pole 130 through the second insulating member 160, and the end of the column 151 away from the pole 130 is connected to the second end cover 113, which can also play a role in heat dissipation and limiting. No specific restrictions are made on the structure of the heat exchange column 150 herein.

[0073] like Figure 4 , Fig.11 and Fig.12As shown, in one embodiment, the pole 130 includes a pole body 131 and a first pole boss 132 and a second pole boss 133 respectively connected to the outer peripheral side of the pole body 131, and the first insulating member 140 includes an insulator 141 and a first insulating boss 142 and a second insulating boss 143 respectively connected to the outer peripheral side of the insulator 141.

[0074] Among them, a pole hole 1311 is provided on the pole body 131, and the pole body 131 is penetrated by the first cover hole 1121 and is electrically connected to one end of the battery cell 120 away from the second end cover 113, the first pole boss 132 is located on the side of the first end cover 112 away from the battery cell 120, and the second pole boss 133 is located on the side of the first end cover 112 close to the battery cell 120, and the insulator 141 is provided with a penetrating second connection hole 1411, and is sleeved on the outer peripheral side of the pole body 131 through the second connection hole 1411, the hole wall of the first cover hole 1121 abuts against the outer peripheral side of the insulator 141, the first insulating boss 142 abuts between the first pole boss 132 and the first end cover 112, and the second insulating boss 143 abuts between the second pole boss 133 and the first end cover 112.

[0075] In this embodiment, since the pole 130 has a first pole boss 132 and a second pole boss 133, and the first insulating member 140 has a first insulating boss 142 and a second insulating boss 143, the first insulating boss 142 abuts between the first pole boss 132 and the first end cover 112, and the second insulating boss 143 abuts between the second pole boss 133 and the first end cover 112, the pole 130 is firmly installed on the first end cover 112, the structural stability of the single cell 100 is increased, and the pole 130 and the first end cover 112 are insulated from each other, reducing the risk of short circuit in the single cell 100.

[0076] like Figure 4 As shown, in one embodiment, a first step surface 162 is provided on the outer circumference of the second insulating member 160 , a second step surface 1312 is provided on the hole wall of the pole hole 1311 , and the first step surface 162 and the second step surface 1312 are in contact with each other.

[0077] In this embodiment, the mutual abutment between the first step surface 162 and the second step surface 1312 can limit the second insulating member 160 from sliding out of the pole hole 1311 in a direction away from the battery cell 120, thereby increasing the stability of the second insulating member 160 and reducing the risk of insulation failure.

[0078] like Figure 6As shown, in another embodiment, a first inclined surface 163 is provided on the outer peripheral side of the second insulating member 160 , a second inclined surface 1313 is provided on the hole wall of the pole hole 1311 , and the first inclined surface 163 and the second inclined surface 1313 are in contact with each other.

[0079] In this embodiment, the mutual abutment between the first inclined surface 163 and the second inclined surface 1313 can also limit the second insulating member 160 from sliding out of the pole hole 1311 in a direction away from the battery cell 120 , thereby increasing the stability of the second insulating member 160 .

[0080] like Figure 6 As shown, further, a third inclined surface 164 is provided on the hole wall of the first connecting hole 161 , a fourth inclined surface 1512 is provided on the outer peripheral side of the heat exchange column 150 , and the third inclined surface 164 and the fourth inclined surface 1512 are in contact with each other.

[0081] In this embodiment, the mutual contact between the first inclined surface 163 and the second inclined surface 1313 can limit the second insulating member 160 from sliding out of the pole hole 1311 in the direction away from the battery cell 120. On this basis, the mutual contact between the third inclined surface 164 and the fourth inclined surface 1512 can limit the second insulating member 160 from moving relative to the pole 130 in the direction close to the battery cell 120. Thus, the second insulating member 160 is limited from moving relative to the pole 130 in the length direction of the heat exchange column 150, and the second insulating member 160 is stably installed between the heat exchange column 150 and the pole 130, which more effectively increases the stability of the second insulating member 160, thereby further reducing the risk of insulation failure.

[0082] like Figure 5 and Figure 8 As shown, in one embodiment, the heat exchange column 150 passes through the second end cover 113 , and through openings 1514 are provided at both ends of the heat exchange column 150 , and each through opening 1514 is connected to the heat exchange channel 1513 .

[0083] In this embodiment, since through openings 1514 are provided at both ends of the heat exchange column 150, the heat exchange channel 1513 in the heat exchange column 150 can be connected to the heat exchange equipment that provides the heat exchange medium through the through openings 1514, so that the heat exchange medium circulates back and forth between the single cell 100 and the heat exchange equipment, thereby continuously extracting the heat inside the single cell 100 to dissipate the heat of the single cell 100 more efficiently.

[0084] like Figure 4 and Figure 5 As shown, in one embodiment, the single battery 100 further includes a first current collecting plate 170 and a second current collecting plate 180 disposed in the accommodating cavity 1111 .

[0085] Among them, the first current collecting plate 170 is electrically connected to the side of the battery cell 120 away from the second end cover 113 and the side of the pole 130 close to the battery cell 120, respectively, and the second current collecting plate 180 is electrically connected to the side of the battery cell 120 away from the first end cover 112 and the side of the second end cover 113 close to the first end cover 112, respectively. A first avoidance hole 171 is provided on the first current collecting plate 170, and a second avoidance hole 181 is provided on the second current collecting plate 180. The heat exchange column 150 is respectively penetrated through the first avoidance hole 171 and the second avoidance hole 181, and there is a gap between the hole wall of the first avoidance hole 171 and the outer peripheral side of the heat exchange column 150, and there is a gap between the hole wall of the second avoidance hole 181 and the outer peripheral side of the heat exchange column 150.

[0086] In the present embodiment, since a gap is provided between the hole wall of the first avoidance hole 171 and the outer peripheral side of the heat exchange column 150 and between the hole wall of the second avoidance hole 181 and the outer peripheral side of the heat exchange column 150, the gap can compensate for the assembly error between the collecting plate and the battery cell 120. Therefore, when installing the heat exchange column 150, it is easier to insert the heat exchange column 150 into the through hole 121 of the battery cell 120 and the pole hole 1311 of the pole 130, thereby improving the assembly efficiency of the single cell 100.

[0087] It should be noted that when the pole 130 has a pole body 131, a first pole boss 132 and a second pole boss 133, the second pole boss 133 and the pole body 131 are both abutted against the side of the first current collecting disk 170 away from the battery cell 120 to achieve electrical connection between the pole 130 and the first current collecting disk 170.

[0088] In a second aspect, an embodiment of the present application provides a battery pack, comprising the single cell 100 mentioned in any of the above embodiments.

[0089] It is understandable that, since the battery pack provided in this embodiment has the single cell 100 in any of the above embodiments, it has all the beneficial effects of the single cell 100, which will not be described in detail here.

[0090] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0091] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A single cell battery, characterized in that: include: A housing (110) comprises a shell (111), a first end cover (112) and a second end cover (113); the shell (111) has a receiving cavity (1111) and a first opening (1113); the first opening (1113) is communicated with the receiving cavity (1111); the first end cover (112) is arranged at one end of the shell (111); the second end cover (113) is arranged at the other end of the shell (111) away from the first end cover (112) and connected to the shell (111) to close the first opening (1113); the first end cover (112) is provided with a first cover hole (1121) penetrating therethrough; A battery core (120) is arranged in the accommodating cavity (1111) and has a height direction (z); a through hole (121) extending in the height direction (z) is arranged on the battery core (120); A first insulating member (140) is disposed on the first end cover (112); A pole (130) is arranged in the first cover hole (1121) and is connected to the first end cover (112) through the first insulating member (140); the pole (130) is electrically connected to an end of the battery cell (120) away from the second end cover (113); and a pole hole (1311) is provided on the pole (130); the pole hole (1311) is communicated with the accommodating cavity (1111); A second insulating member (160), at least partially disposed in the pole hole (1311) and connected to the hole wall of the pole hole (1311), and provided with a first connecting hole (161), wherein the first connecting hole (161) is in communication with the accommodating cavity (1111); A heat exchange column (150) is arranged to pass through the through hole (121), and one end of the heat exchange column (150) away from the first end cover (112) is connected to the second end cover (113), and the heat exchange column (150) is provided with a heat exchange channel (1513) for accommodating a heat exchange medium, and one end of the heat exchange column (150) away from the second end cover (113) is arranged to pass through the first connecting hole (161).

2. The single cell according to claim 1, characterized in that: The outer peripheral side of the second insulating member (160) abuts against the hole wall of the pole hole (1311), and the hole wall of the first connecting hole (161) abuts against the outer peripheral side of the heat exchange column (150).

3. The single cell according to claim 1, characterized in that: The heat exchange column (150) comprises a column (151) and a base (152) connected to each other, wherein the column (151) and the base (152) together define the heat exchange channel (1513); a second cover hole (11311) penetrating therethrough is provided on the second end cover (113); the column (151) is respectively penetrated through the second cover hole (11311) and the through hole (121); the hole wall of the first connection hole (161) abuts against the outer peripheral side of the column (151); and the base (152) is located on a side of the second end cover (113) away from the battery cell (120) and is connected to the second end cover (113).

4. The single cell according to claim 3, characterized in that: The second end cover (113) comprises a cover body (1131) and an annular boss (1132); the cover body (1131) is provided with the second cover hole (11311); the base (152) is located on a side of the cover body (1131) away from the battery cell (120) and is connected to the cover body (1131); the annular boss (1132) is arranged on a side of the cover body (1131) away from the battery cell (120) and is connected to a side of the shell (111) having the first opening (1113); a side of the base (152) away from the column (151), a side of the annular boss (1132) away from the cover body (1131) and a side of the shell (111) having the first opening (1113) are arranged flush.

5. The single cell according to claim 3, characterized in that: An annular groove (1511) is provided along a portion of the outer circumference of the column (151), and the annular groove (1511) is provided close to the pole (130).

6. The single cell according to claim 1, characterized in that: The pole (130) comprises a pole body (131) and a first pole boss (132) and a second pole boss (133) respectively connected to the outer peripheral side of the pole body (131); the pole hole (1311) is provided on the pole body (131), and the pole body (131) is penetrated through the first cover hole (1121) and is electrically connected to an end of the battery cell (120) away from the second end cover (113); the first pole boss (132) is located on a side of the first end cover (112) away from the battery cell (120), the second pole boss (133) is located on a side of the first end cover (112) close to the battery cell (120), and the first insulating member (140) includes an insulator (141) and a first insulating boss (142) and a second insulating boss (143) respectively connected to the outer peripheral side of the insulator (141); the insulator (141) is provided with a penetrating second connecting hole (1411), and is sleeved on the outer peripheral side of the pole body (131) through the second connecting hole (1411); the hole wall of the first cover hole (1121) abuts against the outer peripheral side of the insulator (141); the first insulating boss (142) abuts between the first pole boss (132) and the first end cover (112); and the second insulating boss (143) abuts between the second pole boss (133) and the first end cover (112).

7. The single cell according to any one of claims 1 to 6, characterized in that: A first step surface (162) is provided on the outer peripheral side of the second insulating member (160), a second step surface (1312) is provided on the hole wall of the pole hole (1311), and the first step surface (162) and the second step surface (1312) are in contact with each other.

8. The single cell according to any one of claims 1 to 6, characterized in that: A first inclined surface (163) is provided on the outer peripheral side of the second insulating member (160), a second inclined surface (1313) is provided on the hole wall of the pole hole (1311), and the first inclined surface (163) and the second inclined surface (1313) are in contact with each other.

9. The single cell according to any one of claims 1 to 6, characterized in that: The heat exchange column (150) passes through the second end cover (113), and both ends of the heat exchange column (150) are provided with through openings (1514), and each of the through openings (1514) is connected to the heat exchange channel (1513).

10. The single cell according to any one of claims 1 to 6, characterized in that: The single cell battery further comprises a first current collecting plate (170) and a second current collecting plate (180) arranged in the accommodating cavity (1111), the first current collecting plate (170) being electrically connected to a side of the battery cell (120) away from the second end cover (113) and a side of the pole (130) close to the battery cell (120), respectively, and the second current collecting plate (180) being electrically connected to a side of the battery cell (120) away from the first end cover (112) and a side of the second end cover (113) close to the first end cover (112), respectively. One side is electrically connected, the first collecting plate (170) is provided with a first avoidance hole (171) extending therethrough, the second collecting plate (180) is provided with a second avoidance hole (181) extending therethrough, the heat exchange column (150) is respectively penetrated through the first avoidance hole (171) and the second avoidance hole (181), and a gap is provided between the hole wall of the first avoidance hole (171) and the outer peripheral side of the heat exchange column (150), and a gap is provided between the hole wall of the second avoidance hole (181) and the outer peripheral side of the heat exchange column (150).

11. A battery pack, characterized in that: A single cell comprising the single cell according to any one of claims 1 to 10.

Images