Single-cell batteries and vehicles

Abstract

This application provides a single-cell battery and a vehicle. The single-cell battery includes a cell, a casing, and a first terminal assembly. The cell includes a first tab. The cell is located within the casing. The first terminal assembly includes a first terminal. Along a first direction, the first terminal is disposed at one end of the casing. The first terminal is electrically connected to the first tab. The outer contour of the first terminal is disposed close to the outer contour of the casing. The single-cell battery of this application can solve the problem of low overcurrent capability between two interconnected single-cell batteries.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a single-cell battery and a vehicle. Background Technology

[0002] With the progress of economic globalization and the large-scale use of fossil fuels, environmental pollution and energy shortages have received increasing attention. The search for new energy storage devices has become a research hotspot in the field of new energy. Batteries, with their advantages of high energy density, low self-discharge, good cycle performance, and no memory effect, have rapidly developed into a new generation of energy storage devices, used for power support in fields such as information technology, electric vehicles, and aerospace.

[0003] A single battery cell includes a cell, a casing, and a terminal assembly. The cell may be located inside the casing. The terminal assembly may be located at one end of the casing. A tab may extend from one end of the cell. The terminal assembly can be used for connection to an external circuit. The tab and the terminal assembly may be electrically connected inside the casing.

[0004] Multiple individual cells can be connected in series or parallel to form a battery pack. Electrical conduction between these individual cells can be achieved through terminal blocks. In related technologies, a low overcurrent capability is often observed between two interconnected individual cells. Summary of the Invention

[0005] This application provides a single-cell battery and a vehicle that can solve the problem of low overcurrent capability between two interconnected single-cell batteries.

[0006] On one hand, this application provides a single-cell battery, which includes:

[0007] Battery cell, including the first electrode;

[0008] The battery cell is located inside the casing.

[0009] The first electrode assembly includes a first electrode. Along a first direction, the first electrode is disposed at one end of the housing. The first electrode is electrically connected to a first electrode tab. The outer contour of the first electrode is disposed close to the outer contour of the housing.

[0010] The single-cell battery provided in this application has a first electrode post whose outer contour is close to the outer contour of the casing. This allows the outer surface area of ​​the first electrode post used for connecting to external circuits to be closer to or equal to the surface area formed by the outer contour of the casing. Therefore, when two single-cell batteries are electrically connected through the electrode post, the overcurrent area can be effectively increased. Increasing the overcurrent area improves the overcurrent capability of the single-cell battery, which in turn helps to increase the charging and discharging speed of the single-cell battery.

[0011] Especially when the first terminal of one single cell is directly connected to the first terminal of another single cell, if the outer contour of the first terminal is much smaller than the outer contour of the casing, it can easily affect the connection stability between the two first terminals. Since the first terminal is electrically connected to the cell, a weak connection stability between the first terminals can easily damage the cell. In the embodiments of this application, the first terminal has a sufficiently large outer surface area, which can effectively solve the above problems.

[0012] According to one embodiment of this application, the outer contour of the first pole does not exceed the outer contour of the housing. The first pole includes an outer body and a connecting portion. The connecting portion connects the outer body and the first pole tab. The outer contour of the outer body matches the outer contour of the housing.

[0013] According to one embodiment of this application, along a first direction, the outer body includes a first surface and a second surface disposed opposite to each other, the first surface being away from the battery cell, and the orthographic projection of the outer contour of the first surface being located inside the orthographic projection of the outer contour of the second surface.

[0014] According to one embodiment of this application, the cross-sectional area of ​​the outer body gradually decreases along the direction from the first electrode post away from the battery cell.

[0015] According to one embodiment of this application, the first pole assembly further includes a connecting cover and a pressure plate. The connecting cover is electrically connected to the housing. The pressure plate is disposed on the side of the connecting cover facing the battery cell, and the outer body is disposed on the side of the connecting cover facing away from the battery cell. The pressure plate connects the connecting portion and the first pole ear, and the pressure plate is insulated from the connecting cover.

[0016] According to one embodiment of this application, the connecting part is disposed on the surface of the outer body facing the battery cell, and the connecting cover is provided with a first clearance hole, through which the connecting part passes to connect the pressure plate.

[0017] According to one embodiment of this application, a single battery cell includes two first electrode post assemblies, which are respectively disposed at both ends of the casing along a first direction. The cell also includes a second electrode tab, which is electrically connected to the two first electrode posts.

[0018] According to one embodiment of this application, the single cell also includes a second terminal assembly. The first terminal assembly and the second terminal assembly are respectively disposed at both ends of the housing. The second terminal assembly includes a second terminal, the outer contour of which matches the outer contour of the housing. The cell also includes a second tab, and the second terminal and the second tab are electrically connected.

[0019] According to one embodiment of this application, the second electrode post is provided with a recess, which is recessed towards the battery cell. Along the first direction, the orthographic projection of the outer contour of the recess lies between the orthographic projection of the outer contour of the first surface and the orthographic projection of the outer contour of the second surface.

[0020] On the other hand, this application provides a vehicle that includes a single battery cell as described in the above embodiments. There are multiple single batteries. These multiple single batteries are electrically connected to each other. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0022] Figure 1 This is a schematic diagram of a single-cell battery structure according to an embodiment of this application;

[0023] Figure 2 This is an exploded structural diagram of a single cell battery according to an embodiment of this application;

[0024] Figure 3 This is a partial structural schematic diagram of a single battery cell according to an embodiment of this application;

[0025] Figure 4 This is a partial structural schematic diagram of a single cell battery according to another embodiment of this application;

[0026] Figure 5 This is a cross-sectional view of a first pole post assembly according to an embodiment of this application;

[0027] Figure 6 This is a partial structural diagram of a battery module according to an embodiment of this application;

[0028] Figure 7 for Figure 6 Enlarged view of point A in the middle;

[0029] Figure 8 This is a partial cross-sectional view of a single battery cell according to an embodiment of this application;

[0030] Figure 9 This is a partial cross-sectional view of a single battery cell according to another embodiment of this application;

[0031] Figure 10 This is a partial cross-sectional view of a battery module according to an embodiment of this application.

[0032] Explanation of reference numerals in the attached figures:

[0033] 100, Single cell; 100a, Storage space; 100b, Storage slot;

[0034] 110. Battery cells;

[0035] 111. First pole ear; 112. Second pole ear;

[0036] 120. Shell;

[0037] 130. First pole post assembly;

[0038] 131. First pole;

[0039] 1311, External body; 13111, First surface; 13112, Second surface;

[0040] 1312. Connecting part;

[0041] 132. Connecting cover; 132a. First clearance hole;

[0042] 133. Pressure plate;

[0043] 134, First insulating element; 134a, Protrusion; 134b, Second clearance hole;

[0044] 135. Second insulating component;

[0045] 136. Sealing ring;

[0046] 140. Second pole assembly;

[0047] 141, Second pole post; 141a, Recess; 141b, Insulation groove;

[0048] 142. Connecting end cap;

[0049] 143. Fixing plate;

[0050] 144. Third insulating component;

[0051] 145. Fourth insulating component;

[0052] 150. Liquid-cooled plate assembly;

[0053] 160. Discharge channel plate;

[0054] 170. Explosion-proof valve;

[0055] X, the first direction; Y, the second direction.

[0056] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0057] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0058] The single-cell battery 100 in this application embodiment may include a lithium-ion secondary battery, a lithium-sulfur battery, or a sodium-lithium-ion battery, etc. The battery 100 in this application embodiment may be a solid-state battery or a semi-solid-state battery. No limitation is made in this application. The single-cell battery 100 can generally be divided into prismatic single-cell batteries and pouch single-cell batteries according to the packaging method. Exemplarily, the single-cell battery 100 in this application may be a prismatic single-cell battery.

[0059] The multiple individual battery cells 100 of this application can be connected in series to form a battery module, thereby providing energy for equipment such as vehicles, ships, and small aircraft. Taking vehicles as an example, the vehicles in this application can be new energy vehicles. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle.

[0060] The individual battery 100 can serve as a driving power source for a vehicle, replacing or partially replacing fuel or natural gas to provide driving power. For example, the individual battery 100 can provide electrical energy to a drive motor. The drive motor is connected to the wheels of the vehicle via a transmission mechanism to drive the vehicle. Specifically, a battery module formed by multiple individual batteries 100 connected in series can be horizontally mounted at the bottom of the vehicle.

[0061] The single-cell battery 100 includes a cell 110. The cell 110 includes a positive electrode, a separator, and a negative electrode. The positive electrode, separator, and negative electrode can be formed into a wound cell using a winding process. Alternatively, the positive electrode, separator, negative electrode, and separator can be stacked sequentially to form a stacked cell. Alternatively, the positive electrode, separator, and negative electrode can be formed into a cell using a combination of winding and stacking processes.

[0062] Taking a single cell 100, which can be a lithium-ion battery, as an example, the single cell 100 mainly relies on the movement of lithium ions between the positive and negative electrode plates for charging and discharging. During the charging process, lithium ions can be extracted from the positive electrode plate, and then inserted into the negative electrode plate after passing through the separator.

[0063] The single-cell battery 100 may further include a housing 120 and an electrode assembly. The electrode assembly may be disposed at one end of the housing 120 along a first direction X. The electrode assembly is connected to the housing 120 to form a receiving space 100a that can accommodate the battery cell 110. The electrode assembly may include electrodes.

[0064] In related technologies, the outer contour dimensions of the electrode post are much smaller than the outer contour dimensions of the casing. That is, the surface area of ​​the electrode post facing away from the cell is much smaller than the area of ​​the casing's outer contour projected along the first direction X. The applicant has found that when multiple individual cells are electrically connected through the electrode posts, the small surface area of ​​the electrode post used for electrical connection can easily affect the overcurrent capability of the individual cells.

[0065] Based on the above problems, the inventors have improved the structure of the single battery cell. In this application, the inventors have set the size of the terminal post to be larger, so that the outer contour of the terminal post can be closer to the outer contour of the casing 120. Therefore, when two single batteries 100 connected in series or parallel are electrically connected through the terminal post, the larger surface area of ​​the terminal post electrical connection can effectively improve the overcurrent capability of the single battery 100.

[0066] It should be noted that the outer contour of the terminal post refers to the circumferential outer contour of the surface of the first terminal post 131 used for electrical connection with other individual battery cells 100 along the first direction X. The outer contour of the housing 120 refers to the circumferential outer contour of the housing 120 along the first direction X.

[0067] The single-cell battery 100 provided in this application will be further described below with reference to specific embodiments.

[0068] See Figure 1 and Figure 2 As shown, the single-cell battery 100 of this application embodiment includes a cell 110, a casing 120, and a first terminal assembly 130.

[0069] The battery cell 110 includes a first tab 111. The battery cell 110 may be located within the housing 120. The housing 120 may serve to protect the battery cell 110. The first terminal assembly 130 includes a first terminal 131. One end of the housing 120 may have an opening along a first direction X. The battery cell 110 can be inserted into the housing 120 through the opening end. The first terminal 131 is disposed at the end of the housing 120 with the opening. The first terminal 131 is electrically connected to the first tab 111. The outer contour of the first terminal 131 is close to the outer contour of the housing 120.

[0070] This application describes specific embodiments using a square cell as an example of a single battery cell 100. The first direction X in this application can be the length direction of the single battery cell 100. The outer contour of the first electrode post 131 can refer to the circumferential outer contour of the surface of the first electrode post 131 facing away from the cell 110 along the first direction X. The outer contour of the casing 120 can refer to the circumferential outer contour of the casing 120 along the first direction X.

[0071] The outer contour of the first terminal 131 is close to the outer contour of the housing 120, so that the outer surface area of ​​the first terminal 131 used for connecting external circuits can be closer to or equal to the surface area formed by the outer contour of the housing 120. This allows for the passage of high-voltage current when two individual battery cells 100 connected in series or parallel are electrically connected through the terminal, while also effectively increasing the overcurrent area. The increased overcurrent area improves the overcurrent capability of the individual battery cell 100, thus improving its charging and discharging speed. Simultaneously, the increased overcurrent capability also helps reduce the heat generated by the individual battery cell 100, thereby reducing the burden of thermal management.

[0072] When the first terminal 131 of one single cell 100 is directly connected to the first terminal 131 of another single cell 100, if the outer contour of the first terminal 131 is much smaller than the outer contour of the casing 120, it can easily affect the connection stability between the two first terminals 131. Since the first terminal 131 is electrically connected to the cell 110, a weak connection stability between the first terminals 131 can easily damage the cell 110. In this embodiment, the first terminal 131 has a sufficiently large outer surface area, which can effectively solve the above problems.

[0073] In this embodiment, the outer contour of the first terminal 131 does not exceed the outer contour of the housing 120, thereby reducing the external space occupied by the first terminal 131. In particular, when multiple individual cells 100 are connected in series or parallel to form a battery module, the possibility of the first terminal 131 occupying external space and affecting the energy density of the battery module can be reduced.

[0074] See in some examples Figures 2 to 4 As shown, the outer contour of the first pole post 131 being close to the outer contour of the housing 120 can mean that the outer contour of the first pole post 131 coincides with the outer contour of the housing 120; or it can mean that the outer contour of the first pole post 131 is located inside the outer contour of the housing 120, and the surface area of ​​the outer contour of the first pole post 131 is close to the surface area formed by the outer contour of the housing 120.

[0075] See also some of the possible implementation methods. Figure 5 As shown, the first pole post 131 in this embodiment includes an outer body 1311 and a connecting portion 1312. The connecting portion 1312 connects the outer body 1311 and the first pole tab 111. The outer contour of the outer body 1311 matches the outer contour of the housing 120.

[0076] The surface of the outer body 1311 facing away from the first tab 111 in this embodiment can be used for electrical connection with other single-cell batteries 100. Along the first direction X, the orthographic projection of the outer contour of the outer body 1311 can coincide with the orthographic projection of the outer contour of the housing 120 to maximize the first terminal 131 and improve the overcurrent capability of the single-cell battery 100.

[0077] In addition, see Figure 6 As shown, after multiple individual battery cells 100 are electrically connected to form a battery module, data such as the voltage of the individual battery cells 100 can be collected through the first terminal 131. The data acquisition chip can be connected to the outer body 1311 through a welding process. Since the orthographic projection of the outer contour of the outer body 1311 can coincide with the orthographic projection of the outer contour of the housing 120, the data acquisition chip can be easily connected to the outer body 1311 from the outside without needing to insert the data acquisition chip into the gap created after the electrical connection of two individual battery cells 100. This helps to reduce the processing difficulty of the welding process and improve the assembly efficiency of the individual battery cells 100.

[0078] In some examples, the outer body 1311 can be an elongated structure. The longitudinal section of the connecting portion 1312 can be rectangular. Alternatively, the longitudinal section of the connecting portion 1312 can also be circular. When the longitudinal section of the connecting portion 1312 is circular, the first pole post 131 can include multiple connecting portions 1312. The multiple connecting portions 1312 can be spaced apart along the length direction of the outer body 1311. The longitudinal section is perpendicular to the first direction.

[0079] See in some examples Figure 6 As shown, multiple individual battery cells 100 can be connected in series along a first direction X to form a battery pack. Multiple battery packs can be connected in series along a second direction Y to form a battery module. A liquid cooling plate assembly 150 is typically disposed between two adjacent battery packs. The liquid cooling plate assembly 150 can contact the housing 120, thereby dissipating and cooling the heat generated by the individual battery packs.

[0080] It should be noted that the liquid cooling plate assembly 150 may include a liquid cooling plate and an insulating layer. The insulating layer can insulate and isolate the liquid cooling plate from the individual battery cells.

[0081] See also some of the possible implementation methods. Figure 5 As shown, along the first direction X, the outer body 1311 includes a first surface 13111 and a second surface 13112 disposed opposite to each other. The first surface 13111 is disposed away from the battery cell 110. The second surface 13112 can be connected to the connecting portion 1312. The orthographic projection of the outer contour of the first surface 13111 is located inside the orthographic projection of the outer contour of the second surface 13112.

[0082] The orthographic projection of the outer contour of the first surface 13111 is located inside the orthographic projection of the outer contour of the second surface 13112, and the area of ​​the first surface 13111 is smaller than the area of ​​the second surface 13112.

[0083] In some examples, the outer body 1311 and the connecting part 1312 may be an integral structure. Alternatively, the outer body 1311 and the connecting part 1312 may be connected by processes such as welding. This application does not impose any limitations.

[0084] See in some examples Figure 3 and Figure 4 As shown, the end of the outer body 1311 facing away from the battery cell 110 may be provided with a chamfer, step, or other structure. No specific limitations are made in this embodiment.

[0085] See also some of the possible implementation methods. Figure 3 As shown, along the direction of the first pole post 131 away from the cell 110, the cross-sectional area of ​​the outer body 1311 gradually decreases.

[0086] See in some examples Figure 6 and Figure 7 As shown, the end of the outer body 1311 facing away from the cell 110 may have a chamfer. Two individual battery cells 100 can be electrically connected via their respective first terminals 131. That is, the first terminal 131 of one individual battery cell 100 can be directly connected to the first terminal 131 of the other individual battery cell 100. The first terminals 131 of the two individual battery cells 100 can be arranged opposite to each other so that the chamfers of the outer bodies 1311 of the two individual battery cells 100 can be arranged opposite each other to form a receiving groove 100b.

[0087] The two first electrode posts 131 can be connected by welding, bonding, or riveting. Taking the connection of the two first electrode posts 131 by welding as an example, parts of the outer bodies 1311 of the two first electrode posts 131 can be fused together after melting. The receiving tank 100b can hold the liquid formed by the melting of the outer bodies 1311 of each of the two individual batteries 100. After the liquid cools, a fixed connection can be achieved between the two outer bodies 1311, thereby improving the connection reliability between the two first electrode posts 131. In addition, the receiving tank 100b can also reduce the possibility that the liquid overflows and cools to form a solid, occupying external space and affecting the energy density of the entire battery module.

[0088] See also some of the possible implementation methods. Figure 5As shown, the first electrode assembly 130 of this embodiment further includes a connecting cover 132 and a pressure plate 133. The connecting cover 132 is connected to the housing 120. The pressure plate 133 is disposed on the side of the connecting cover 132 facing the battery cell 110. The outer body 1311 of the first electrode 131 is disposed on the side of the connecting cover 132 facing away from the battery cell 110. That is, along the first direction X, the connecting cover 132 is located between the outer body 1311 and the pressure plate 133, and the pressure plate 133 is disposed close to the battery cell 110. The pressure plate 133 connects the connecting portion 1312 of the first electrode 131 and the first tab 111. The pressure plate 133 is insulated from the connecting cover 132.

[0089] In some examples, the housing 120 and the first terminal 131 may be made of a conductive metallic material. The housing 120 may have high strength to reduce the possibility that the housing 120 may be punctured during handling or transportation, thereby damaging the cell 110.

[0090] For example, the material of the housing 120 can be a metallic material or a non-metallic material. For instance, a metallic material can be aluminum, aluminum alloy, steel, or stainless steel. A non-metallic material can be plastic. The material of the first pole post 131 can be aluminum. No limitation is made in this application.

[0091] In some examples, the first pole 131 and the housing 120 may be insulated from each other. The first pole assembly 130 may also include a first insulator 134 and a second insulator 135. The first insulator 134 may insulate the connecting cover 132 and the pressure plate 133. The second insulator 135 may insulate the first pole 131 and the connecting cover 132.

[0092] In some examples, the pressure plate 133 may be positioned close to the battery cell 110. Along the first direction X, the end face of the pressure plate 133 facing the battery cell 110 may be connected to the first tab 111 or the second tab 112. The end face of the pressure plate 133 facing away from the battery cell 110 may be connected to the connection portion 1312 of the first terminal post 131.

[0093] In some examples, at least a portion of the outer contour of the connecting cover 132 may be electrically connected to the inner wall of the housing 120. It should be noted that the outer contour of the connecting cover 132 may refer to the circumferential outer contour of the connecting cover 132 along the first direction X. A first insulating member 134 may be disposed between the connecting cover 132 and the pressure plate 133. The first insulating member 134 can insulate and isolate the connecting cover 132 and the pressure plate 133 to reduce the possibility of electrical connection between the housing 120 and the first pole post 131.

[0094] In some examples, along the first direction X, the second insulating member 135 may be disposed between the outer body 1311 of the first pole post 131 and the connecting cover 132 so that the first pole post 131 and the housing 120 can be insulated from each other.

[0095] In some examples, the first insulator 134 and the second insulator 135 can have good strength and rigidity and are not easily deformed. For example, both the first insulator 134 and the second insulator 135 can be made of plastic.

[0096] In some examples, the housing 120 and the connecting cover 132 can be connected by welding.

[0097] See also some of the possible implementation methods. Figure 5 As shown, the connecting part 1312 is provided on the surface of the outer body 1311 facing the battery cell 110. The connecting cover 132 is provided with a first clearance hole 132a. The connecting part 1312 passes through the first clearance hole 132a to be electrically connected to the pressure plate 133.

[0098] The first insulating member 134 may include a protrusion 134a. The protrusion 134a may be disposed facing the external body 1311. A second clearance hole 134b may be provided on the protrusion 134a. The protrusion 134a of the first insulating member 134 can be inserted into the first clearance hole 132a, and the connecting portion 1312 of the first pole post 131 can pass through the second clearance hole 134b of the protrusion 134a, thereby the protrusion 134a can insulatingly isolate the connecting portion 1312 and the connecting cover 132.

[0099] In some examples, the first terminal assembly 130 may also include a sealing ring 136. The sealing ring 136 may be disposed between the outer body 1311 and the second insulator 135, and the sealing ring 136 may be fitted onto the outer wall of the protrusion 134a. The sealing ring 136 can seal the internal environment of the single cell 100, reducing the possibility that the internal environment of the single cell 100 may be connected to the external environment and affect the operating performance of the single cell 100.

[0100] In some examples, the assembly process of the single cell 100 may involve assembling the pressure plate 133, the first insulator 134, the connecting cover 132, the second insulator 135, the sealing ring 136, and the first terminal 131 into a single unit, namely the first terminal assembly 130. The cell 110 can be placed inside the housing 120. The pressure plate 133 and the first terminal 111 can be connected by welding. Finally, the connecting cover 132 is sealed to the housing 120.

[0101] See also some of the possible implementation methods. Figure 6 and Figure 7As shown, the single-cell battery 100 of this application embodiment includes two first electrode post assemblies 130. Along the first direction X, the two first electrode post assemblies 130 are respectively disposed on the casing.

[0102] The two ends of the body 120. The battery cell 110 also includes a second tab 112. The first tab 111 and the second tab 112 are electrically connected to two first terminals 131 respectively.

[0103] In some examples, the housing 120 may have two openings along the first direction X. The two first pole post assemblies 130 may each close one of the two openings.

[0104] In some examples, the polarities of the first electrode tab 111 and the second electrode tab 112 can be opposite. Two first electrodes

[0105] The post assembly 130 is electrically connected to the first tab 111 and the second tab 112 respectively, so the two first posts 131 can have opposite polarities.

[0106] In some examples, the housing 120 may be de-energized because the first pole assembly 130 includes a first insulator 134 and a second insulator 135 to insulate the housing 120 from the first pole 131.

[0107] See also some of the possible implementation methods. Figure 2 and Figure 8 As shown, the single-cell battery 100 of this embodiment further includes a second terminal assembly 140. The first terminal assembly 130 and the second terminal assembly 140 are respectively disposed at both ends of the housing 5120. The second terminal assembly 140 includes a second terminal 141. The outer contour of the second terminal 141 matches the outer contour of the housing 120. The cell 110 also includes a second tab 112. The second terminal 141 and the second tab 112 are electrically connected.

[0108] See in some examples Figure 8 As shown, the second terminal 141 can be insulated from the housing 120. Example

[0109] Specifically, the second pole post assembly 140 may include a connecting end cap 142, a fixing plate 143, a third insulating element 144, a fourth insulating element 145, and a second sealing ring 136. The second pole post 141 and the second pole tab 112 can be connected via...

[0110] The fixing plate 143 is electrically conductive. The connecting end cap 142 and the housing 120 can be insulated from each other by a third insulating member 144.

[0111] The connecting end cap 142 and the fixing plate 143 can be insulated and isolated by a fourth insulating element 145.

[0112] In some examples, the third insulating element 144 and the fourth insulating element 145 may be made of the same material as the first insulating element 134 and the second insulating element 135.

[0113] In some examples, the orthographic projection of the outer contour of the second terminal 141 along the first direction X can coincide with the orthographic projection of the outer contour of the housing 120, thereby maximizing the surface area of ​​the second terminal 141 for electrical connection with other individual cells 100. When the second terminal 141 of one individual cell 100 is electrically connected to either the first terminal 131 or the second terminal 141 of another individual cell 100, the overcurrent capability between the two individual cells 100 can be effectively improved.

[0114] Meanwhile, after multiple individual cells 100 are electrically connected to form a battery module, when it is necessary to collect data information such as the voltage of the individual cells 100 through the second terminal 141, the data acquisition chip can be easily connected to the second terminal 141.

[0115] In other examples, see Figure 9 As shown, when the first terminal 131 is insulated from the housing 120, the second terminal 141 can be electrically connected to the housing 120. The housing 120 can be at the same potential as the second terminal 141. Therefore, the second terminal 141 and the housing 120 can be directly connected without the need for insulating parts such as the third insulating part 144 or the fourth insulating part 145.

[0116] See also some of the possible implementation methods. Figures 8 to 10 As shown, in this embodiment of the application, the surface of the second electrode 141 facing away from the battery cell 110 is provided with a recess 141a. The recess 141a is recessed in the direction of the battery cell 110. Along the first direction X, the orthographic projection of the outer contour of the recess 141a is located between the orthographic projection of the outer contour of the first surface 13111 and the orthographic projection of the outer contour of the second surface 13112.

[0117] The opening of the recess 141a is positioned away from the cell 110. When multiple individual cells 100 are electrically connected along the first direction X, a portion of the outer body 1311 of one cell 100 can be located within the recess 141a of the second terminal post 141 of another cell 100. Thus, along the first direction X, the size of two adjacent cells 100 connected in series can be smaller than the sum of the sizes of the two individual cells 100.

[0118] Therefore, at least a portion of the first terminal post 131 of a single cell 100 can be located within the recess 141a of the second terminal post 141 of another single cell 100, which can effectively save space in the battery module along the first direction X, improve the space utilization rate inside the battery module, and increase the energy density of the battery module.

[0119] In some examples, the cross-sectional shape of the recess 141a can match the cross-sectional shape of the outer body 1311. The cross-section is perpendicular to the first direction X.

[0120] See in some examples Figures 8 to 10 As shown, a heat-insulating groove 141b may be provided on the bottom wall of the recess 141a. The opening of the heat-insulating groove 141b is disposed away from the battery cell 110. The heat-insulating groove 141b may be recessed toward the battery cell 110.

[0121] The first terminal 131 of one single cell 100 can be directly connected to the second terminal 141 of another single cell 100. When one of the single cells 100 abnormally generates a large amount of heat, the heat can be released to the outside of the single cell 100 through the heat insulation groove 141b, thereby reducing the possibility that the heat will continue to rise and affect the adjacent single cells 100, or even affect the working performance of the entire battery module.

[0122] In some examples, the cross-sectional area of ​​the heat insulation groove 141b may be smaller than the cross-sectional area of ​​the recess 141a, so that there is a gap between the surface of the outer body 1311 of a single cell 100 facing away from the cell 110 and the bottom wall of the heat insulation groove 141b.

[0123] This application also provides a vehicle. The vehicle includes the single-cell battery 100 described in the above embodiments. The single-cell battery 100 may further include a discharge channel plate 160 and an explosion-proof valve 170. The discharge channel plate 160 may be located inside the housing 120. The explosion-proof valve 170 may be located outside the housing 120. The discharge channel plate 160 and the explosion-proof valve 170 may be correspondingly arranged. The discharge channel plate 160 may be used to support the battery cell 110, so that there can be a gap between the battery cell 110 and the inner wall of the housing 120, so that when the single-cell battery 100 malfunctions, the battery cell 110 is less likely to block the explosion-proof valve 170 and cause the explosion-proof valve 170 to fail.

[0124] There are multiple individual battery cells 100. Multiple individual battery cells 100 can be electrically connected to each other to form a battery module. The battery module can provide power to the vehicle.

[0125] In some examples, the battery module may be located at the bottom of the vehicle.

[0126] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application according to the specific circumstances.

[0127] The devices or elements referred to in the embodiments of this application or implied herein must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of this application. In the description of the embodiments of this application, "a plurality of" means two or more, unless otherwise precisely specified.

[0128] The terms "first," "second," "third," "fourth," etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein.

[0129] Furthermore, the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such that a process, method, system, product, or apparatus that includes a series of steps or units is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or apparatus.

[0130] The term "multiple" in this article refers to two or more. The term "and / or" in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. Furthermore, the character " / " in this article generally indicates an "or" relationship between the preceding and following related objects; in formulas, the character " / " indicates a "division" relationship between the preceding and following related objects.

[0131] It is understood that the various numerical designations used in the embodiments of this application are merely for descriptive convenience and are not intended to limit the scope of the embodiments of this application.

[0132] It is understood that, in the embodiments of this application, the order of the above-mentioned process numbers does not imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

Claims

1. A single cell, characterized by, The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively.

2. The cell according to claim 1, wherein The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively.

3. The cell according to claim 1, wherein The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively.

4. The cell according to claim 2, wherein The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively.

5. The cell according to claim 2, wherein The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively.

6. The cell according to claim 5, wherein The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively.

7. A vehicle characterized by comprising: The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. 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The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. 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The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. The single battery comprises two first pole post assemblies, and two first pole post assemblies are arranged at two ends of the shell in the first direction respectively. 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