Battery cover plate assembly, battery, battery pack and electric equipment

Abstract

The utility model provides a battery cover plate assembly, a battery, a battery pack and electric equipment. The battery cover plate assembly is used for being mounted on a battery shell of a battery and comprises a connecting ring, an insulating ring and a cover plate, wherein the connecting ring is used for connecting a battery shell; the insulating ring is connected to the battery shell through the connecting ring; at least part of the cover plate is connected into the inner ring of the insulating ring, and the cover plate is connected with a tab of the battery; the orthographic projection area of the cover plate located in the inner ring of the insulating ring on the surface where the outer top wall of the insulating ring is located is S1, the orthographic projection area of the outer ring of the insulating ring on the surface where the outer top wall of the insulating ring is located is S2, and S1 and S2 meet the condition that S1 / S2 is larger than or equal to 1 / 10 and smaller than or equal to 1 / 2. The problems that a battery is large in temperature rise, short in service life and poor in use safety are solved.

Description

Technical Field

[0001] Embodiments of the present application relate to the technical field of batteries, and in particular, to a battery cover assembly, a battery, a battery pack, and an electrical device. Background Art

[0002] A battery is a power source that provides power for tools, mostly referring to a storage battery or a rechargeable battery that provides power for electric vehicles, electric trains, electric bicycles, and golf carts.

[0003] A battery refers to a container filled with an electrolyte solution and electrodes to generate an electric current, which can convert chemical energy into electrical energy. It has a positive electrode and a negative electrode. Among them, the negative electrode of the battery has a relatively thin electrode foil, a relatively high heat generation, and an explosion-proof valve is provided on the negative electrode cover.

[0004] However, the above-mentioned battery has problems of relatively large temperature rise, relatively low service life, and relatively poor use safety. Utility Model Content

[0005] Embodiments of the present application provide a battery cover assembly, a battery, a battery pack, and an electrical device, which can solve the problems of relatively large temperature rise, relatively low service life, and relatively poor use safety of the battery.

[0006] Embodiments of the present application provide the following technical solutions:

[0007] In a first aspect of embodiments of the present application, a battery cover assembly is provided for installing on a battery housing of a battery. The battery cover assembly includes:

[0008] A connecting ring for connecting the battery housing;

[0009] An insulating ring connected to the battery housing through the connecting ring;

[0010] A cover plate, at least a part of the cover plate is connected to the inner ring of the insulating ring, and the cover plate is connected to the tab of the battery;

[0011] Among them, for the cover plate located in the inner ring of the insulating ring, the orthographic projection area on the plane where the outer top wall of the insulating ring is located is S1;

[0012] For the outer ring of the insulating ring, the orthographic projection area on the plane where the outer top wall of the insulating ring is located is S2;

[0013] S1 and S2 satisfy: 1 / 10 ≤ S1 / S2 ≤ 1 / 2.

[0014] For the battery cover assembly with this structure, the connecting ring is used to connect the battery housing and the insulating ring to reduce the connection difficulty between the battery housing and the insulating ring; the insulating ring is used to insulate and connect the cover plate and the battery housing to reduce the occurrence of battery short - circuit; the cover plate is used to connect with the electrode core of the battery through the tab to form the positive and negative electrodes of the battery to meet the normal use of the battery; the cover plate located in the inner ring of the insulating ring has a positive projection area S1 on the plane where the outer top wall of the insulating ring is located; the outer ring of the insulating ring has a positive projection area S2 on the plane where the outer top wall of the insulating ring is located; the relationship between S1 and S2 satisfies: 1 / 10 ≤ S1 / S2 ≤ 1 / 2. Through this setting method, the area of the cover plate can be increased, thereby increasing the current - carrying area of the cover plate, making the current - carrying surface of the cover plate larger, so as to improve the current - carrying capacity of the cover plate, and thus improve the performance of the battery cover assembly; the increase of the current - carrying surface of the cover plate can reduce the temperature of the battery, thus playing a role in prolonging the battery life and improving the use safety of the battery.

[0015] Therefore, the battery cover assembly provided by the embodiment of the present application can solve the problems of large battery temperature rise, low service life, and poor use safety.

[0016] In a feasible implementation manner, the positive projection area S1 of the cover plate located in the inner ring of the insulating ring on the plane where the outer top wall of the insulating ring is located satisfies:

[0017] S1 ≥ 50 square millimeters.

[0018] For the battery cover assembly with this structure, the cover plate located in the inner ring of the insulating ring is connected to the electrode core of the battery through the tab. Increasing the area of the cover plate located in the inner ring of the insulating ring can increase the current - carrying area of the cover plate, making the current - carrying surface of the cover plate larger, so as to improve the current - carrying capacity of the cover plate, and thus improve the performance of the battery cover assembly.

[0019] In a feasible implementation manner, at least part of the cover plate protrudes from the insulating ring.

[0020] For the battery cover assembly with this structure, the part of the cover plate protruding from the insulating ring is used to facilitate the installation of the operator with other external components. The part protruding from the insulating ring can play a role in reminding the operator that this part is the preset installation position, thus guiding the position for the operator's installation, reducing the installation difficulty between the battery cover assembly and other external components, and thus improving the installation efficiency of the battery pack.

[0021] In a feasible implementation manner, the cover plate includes a first part and a second part. The second part is connected to the periphery of the first part, and part of the first part is located in the inner ring of the insulating ring.

[0022] The battery cover assembly of this structure has a first part which is used to pass through an insulating ring and then be connected to the pole core of the battery through the pole ear so that the pole core, the pole ear and the cover can be electrically connected; the second part is used to connect with the insulating ring to limit the relative movement between the cover and the insulating ring, thereby improving the connection stability of the battery cover assembly.

[0023] It should be noted that the second part is arranged on the peripheral side of the first part, which can increase the contact area between the second part and the insulating ring, thereby increasing the connection strength between the insulating ring and the cover plate, and reducing the occurrence of the cover plate falling off the insulating ring, thereby increasing the service life of the battery.

[0024] In a feasible implementation manner, the first portion is located in the inner ring of the insulating ring, and the second portion is arranged to protrude from the insulating ring.

[0025] In the battery cover assembly of this structure, the insulating ring is used to limit the movement of the second part toward the side close to the battery housing to limit the offset between the insulating ring and the cover, thereby improving the connection stability between the cover and the insulating ring, thereby increasing the service life of the battery cover assembly.

[0026] It should be noted that the second protruding insulating ring portion is used to facilitate the operator to install it with other external components. The second protruding insulating ring portion can serve to remind the operator that this portion is a preset installation position, thereby guiding the operator's installation position to reduce the difficulty of installing the battery cover assembly with other external components, thereby improving the installation efficiency of the battery pack.

[0027] In a feasible implementation manner, the first portion passes through the inner ring of the insulating ring, and at least a portion of the first portion protrudes out of the insulating ring.

[0028] In the battery cover assembly of this structure, the insulating ring is used to limit the movement of the second part toward the side away from the battery housing to limit the offset between the insulating ring and the cover, thereby improving the connection stability between the cover and the insulating ring, thereby increasing the service life of the battery cover assembly.

[0029] It should be noted that the first protruding insulating ring portion is used to facilitate the operator to install it with other external components. The first protruding insulating ring portion can serve to remind the operator that this portion is a preset installation position, thereby guiding the operator's installation position to reduce the difficulty of installing the battery cover assembly with other external components, thereby improving the installation efficiency of the battery pack.

[0030] In a feasible implementation manner, the insulating ring is formed with a first fixing portion, the cover plate is formed with a second fixing portion, and the first fixing portion is connected to the second fixing portion.

[0031] For the battery cover assembly of this structure, the fixed connection between the first fixing part and the second fixing part can limit the occurrence of offset between the cover plate and the insulating ring, thereby improving the connection strength between the cover plate and the insulating ring and enhancing the service life of the battery cover assembly.

[0032] In a feasible implementation manner, the first fixing part is disposed on the side of the insulating ring away from the battery housing;

[0033] Alternatively, the first fixing part is disposed on the side of the insulating ring facing the battery housing.

[0034] For the battery cover assembly of this structure, the first fixing part is used to limit the movement of the cover plate towards or away from the side close to the battery housing, thereby guiding the installation positions of the cover plate and the insulating ring, reducing the installation difficulty between the cover plate and the insulating ring, and thus playing a role in improving the installation efficiency of the cover plate and the insulating ring.

[0035] In the second aspect of the embodiments of the present application, a battery is provided, which includes a battery housing and a battery cover assembly;

[0036] The battery cover assembly is disposed on the battery housing.

[0037] In the third aspect of the embodiments of the present application, a battery pack is provided, which includes a battery.

[0038] In the fourth aspect of the embodiments of the present application, an electrical device is provided, which includes an electrical device, a battery or a battery pack, and the battery or the battery pack is used to provide electrical energy for the electrical device.

[0039] In addition to the technical problems solved by the embodiments of the present application described above, the technical features constituting the technical solutions, and the beneficial effects brought by these technical features of the technical solutions, the other technical problems that can be solved by the battery cover assembly, battery, battery pack and electrical device provided by the embodiments of the present application, the other technical features included in the technical solutions, and the beneficial effects brought by these technical features will be further described in detail in the specific implementation manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0041] Figure 1 FIG. 1 is an exploded structural schematic diagram of a connection ring, an insulating ring and a cover plate provided for an embodiment of the present application;

[0042] Figure 2Schematic diagram of the main structure of the insulating ring and the cover plate provided by the embodiment of the present application, one of them;

[0043] Figure 3 Provided by the embodiment of the present application Figure 2 Schematic diagram of the sectional structure of A-A in;

[0044] Figure 4 Schematic diagram of the exploded structure of the connecting ring, insulating ring and cover plate provided by the embodiment of the present application, two of them;

[0045] Figure 5 Schematic diagram of the main structure of the insulating ring and the cover plate provided by the embodiment of the present application, two of them;

[0046] Figure 6 Provided by the embodiment of the present application Figure 5 Schematic diagram of the sectional structure of B-B in;

[0047] Figure 7 Schematic diagram of the exploded structure of the connecting ring, insulating ring and cover plate provided by the embodiment of the present application, three of them;

[0048] Figure 8 Schematic diagram of the distribution structure of S1 provided by the embodiment of the present application;

[0049] Figure 9 Schematic diagram of the distribution structure of S1 provided by the embodiment of the present application.

[0050] Explanation of reference numerals:

[0051] 100 - Connecting ring;

[0052] 200 - Insulating ring; 201 - First fixing part;

[0053] 300 - Cover plate; 301 - First part; 302 - Second part; 303 - Second fixing part;

[0054] 400 - Explosion-proof valve;

[0055] 500 - Liquid injection hole. Detailed implementation manners

[0056] A battery is a power source that provides power for tools, mostly referring to storage batteries or rechargeable batteries that provide power for electric vehicles, electric trains, electric bicycles, and golf carts.

[0057] A battery refers to a container filled with an electrolyte solution and electrodes to generate current, which can convert chemical energy into electrical energy. It has positive and negative poles. Among them, the negative pole of the battery has a relatively thin electrode foil, generates relatively high heat, and an explosion-proof valve 400 is provided on the negative cover plate.

[0058] However, when installing the tab, the installation position of the explosion-proof valve 400 needs to be avoided, which results in a narrow installation area between the tab and the negative cover plate, further exacerbating the problems of large temperature rise of the battery, low service life, and poor use safety.

[0059] In the battery cover plate assembly provided by the embodiment of the present application, the connecting ring 100 is used to connect the battery case and the insulating ring 200 to reduce the connection difficulty between the battery case and the insulating ring 200; the insulating ring 200 is used to insulatively connect the cover plate 300 and the battery case to reduce the occurrence of battery short circuits; the cover plate 300 is used to be connected to the electrode core of the battery through the tab to form the positive and negative electrodes of the battery to meet the normal use of the battery; the cover plate 300 located in the inner ring of the insulating ring 200 has a positive projection area S1 on the plane where the outer top wall of the insulating ring 200 is located; the outer ring of the insulating ring 200 has a positive projection area S2 on the plane where the outer top wall of the insulating ring 200 is located, and S1 and S2 satisfy: 1 / 10 ≤ S1 / S2 ≤ 1 / 2. By this setting method, the area of the cover plate 300 can be increased, thereby increasing the current-carrying area of the cover plate 300, so that the current-carrying surface of the cover plate 300 becomes larger to improve the current-carrying capacity of the cover plate 300, thereby improving the use performance of the battery cover plate assembly. The increase in the current-carrying surface of the cover plate 300 can reduce the temperature of the battery, thereby playing a role in extending the battery life and improving the use safety of the battery.

[0060] As Figure 1 shown, the battery cover plate assembly provided by the embodiment of the present application is used to be installed on the battery case of the battery. The battery cover plate assembly includes: a connecting ring 100, an insulating ring 200, and a cover plate 300; wherein, the connecting ring 100 is used to connect the battery case; the insulating ring 200 is connected to the battery case through the connecting ring 100; at least a part of the cover plate 300 is connected to the inner ring of the insulating ring 200, and the cover plate 300 is connected to the tab of the battery.

[0061] As Figures 8 to 9 shown, the cover plate 300 located in the inner ring of the insulating ring 200 has a positive projection area S1 on the plane where the outer top wall of the insulating ring 200 is located; the outer ring of the insulating ring 200 has a positive projection area S2 on the plane where the outer top wall of the insulating ring 200 is located, and S1 and S2 satisfy: 1 / 10 ≤ S1 / S2 ≤ 1 / 2.

[0062] It should be noted that the insulating ring 200 and the connecting ring 100 are connected by brazing. Brazing can improve the connection strength between the connecting ring 100 and the insulating ring 200, and can solve the problem of large welding difficulty caused by directly connecting the insulating ring 200 to the battery case, and can provide safety protection for the electrode core in the battery case.

[0063] It should be noted that the connecting ring 100 is a metal ring. The setting of the metal ring can reduce the connection difficulty between the connecting ring 100 and the battery housing, thereby improving the processing efficiency between the battery cover assembly and the battery housing.

[0064] As Figure 2 shown, it should be noted that the cover plate 300 is made of a conductive material. The conductive material can be connected to the electrode core of the battery through the tab of the battery, so that the cover plate 300 can connect the inside and outside circuits of the battery, thereby playing the role of transmitting current and leading out the voltage.

[0065] As Figure 3 shown, it should be noted that the insulating ring 200 is made of an insulating material or a material with weak conductivity. The insulating ring 200 is used to isolate the direct contact between the cover plate 300 and the battery housing, and the insulating ring 200 can insulate and isolate the battery housing and the cover plate 300 to reduce the occurrence of battery short circuits and provide safety protection for the battery, thereby extending the service life of the battery.

[0066] It should be noted that if S1 / S2 is less than 1 / 10, the connection strength between the insulating ring 200 and the cover plate 300 will be insufficient, resulting in the cover plate 300 falling off from the insulating ring 200; if S1 / S2 is greater than 1 / 2, since the cover plate 300 is a metal part, increasing the volume of the cover plate 300 will increase the weight of the metal part, resulting in an increase in the overall weight of the battery, which is not conducive to the light weight of the battery, and will also result in a high processing cost of the cover plate 300. By making S1 and S2 satisfy: 1 / 10 ≤ S1 / S2 ≤ 1 / 2, the area of the cover plate 300 can be increased, thereby increasing the current-carrying area of the cover plate 300, making the current-carrying surface of the cover plate 300 larger, so as to improve the current-carrying capacity of the cover plate 300, thereby improving the service performance of the battery cover assembly; and the overall weight of the cover plate 300 can be reduced, thereby playing the role of reducing the weight of the battery, so that the battery can be made lighter.

[0067] Therefore, the battery cover assembly provided by the embodiment of the present application can solve the problems of large battery temperature rise, low service life, and poor use safety.

[0068] As Figure 4 shown, for the cover plate 300 located in the inner circle of the insulating ring 200 provided by the embodiment of the present application, the orthographic projection area S1 on the plane where the outer top wall of the insulating ring 200 is located satisfies: S1 ≥ 50 square millimeters.

[0069] As Figure 5As shown, it should be noted that the cover plate 300 located in the inner ring of the insulating ring 200 is connected to the electrode core of the battery through the tab. Increasing the area of the cover plate 300 located in the inner ring of the insulating ring 200 can increase the current-carrying area of the cover plate 300, thereby making the current-carrying surface of the cover plate 300 larger, improving the current-carrying capacity of the cover plate 300, and thus improving the service performance of the battery cover plate assembly.

[0070] It should be noted that if S1 is less than 50 square millimeters, the connection strength between the insulating ring 200 and the cover plate 300 will be insufficient, resulting in the cover plate 300 falling off from the insulating ring 200; and due to the small size of the cover plate 300, the temperature rise of the battery will be large, reducing the service life of the battery and resulting in poor safety of the battery.

[0071] As Figure 6 shown, please refer to Figure 3 for assistance. In the embodiment provided by the present application, the cover plate 300 protrudes from the insulating ring 200 at least partially.

[0072] It can be understood that the part of the cover plate 300 protruding from the insulating ring 200 is used to facilitate the installation of the operator with other external components. The part protruding from the insulating ring 200 can play a role in prompting the operator that this part is the preset installation position, thereby guiding the position for the operator's installation, reducing the installation difficulty between the battery cover plate assembly and other external components, and thus improving the installation efficiency of the battery pack.

[0073] The cover plate 300 provided by the embodiment of the present application includes a first part 301 and a second part 302. The second part 302 is connected to the peripheral side of the first part 301, and part of the first part 301 is located in the inner ring of the insulating ring 200.

[0074] It can be understood that part of the first part 301 is used to pass through the insulating ring 200 and then be connected to the electrode core of the battery through the tab, so that the electrode core, the tab, and the cover plate 300 can be electrically connected; the second part 302 is used to be connected to the insulating ring 200 to limit the relative movement between the cover plate 300 and the insulating ring 200, thereby improving the connection stability of the battery cover plate assembly.

[0075] It should be noted that the second part 302 is arranged on the peripheral side of the first part 301, which can increase the contact area between the second part 302 and the insulating ring 200, thereby improving the connection strength between the insulating ring 200 and the cover plate 300, reducing the occurrence of the cover plate 300 falling off from the insulating ring 200, and thus improving the service life of the battery.

[0076] There are various different installation methods between the cover plate 300 and the insulating ring 200 provided by the embodiment of the present application. The installation methods between the cover plate 300 and the insulating ring 200 will be exemplified below.

[0077] In a feasible implementation, the first part 301 is located in the inner ring of the insulating ring 200, the second part 302 protrudes from the insulating ring 200, and the connection between the second part 302 and the insulating ring 200 is located on the side of the insulating ring 200 away from the battery housing. The insulating ring 200 is used to limit the movement of the second part 302 toward the side close to the battery housing, so as to limit the offset between the insulating ring 200 and the cover plate 300, thereby improving the connection stability between the cover plate 300 and the insulating ring 200, and improving the service life of the battery cover assembly.

[0078] It should be noted that the part of the second part 302 protruding from the insulating ring 200 is used to facilitate the installation of the operator with other external components. The part of the second part 302 protruding from the insulating ring 200 can play a role in prompting the operator that this part is the preset installation position, so as to guide the position for the operator's installation, reduce the installation difficulty of the battery cover assembly with other external components, and improve the installation efficiency of the battery pack.

[0079] In another feasible implementation, the first part 301 passes through the inner ring of the insulating ring 200, at least part of the first part 301 protrudes from the insulating ring 200, and the connection between the second part 302 and the insulating ring 200 is located between the insulating ring 200 and the battery housing. The insulating ring 200 is used to limit the movement of the second part 302 toward the side away from the battery housing, so as to limit the offset between the insulating ring 200 and the cover plate 300, thereby improving the connection stability between the cover plate 300 and the insulating ring 200, and improving the service life of the battery cover assembly.

[0080] It should be noted that the part of the first part 301 protruding from the insulating ring 200 is used to facilitate the installation of the operator with other external components. The part of the first part 301 protruding from the insulating ring 200 can play a role in prompting the operator that this part is the preset installation position, so as to guide the position for the operator's installation, reduce the installation difficulty of the battery cover assembly with other external components, and improve the installation efficiency of the battery pack.

[0081] It can be understood that the specific installation method between the cover plate 300 and the insulating ring 200 is not limited and can be selected according to actual usage requirements.

[0082] The insulating ring 200 provided in the embodiment of the present application is formed with a first fixing portion 201, and the cover plate 300 is formed with a second fixing portion 303, and the first fixing portion 201 is connected to the second fixing portion 303.

[0083] It should be noted that there are various different connection methods between the first fixing portion 201 and the second fixing portion 303. The connection methods between the first fixing portion 201 and the second fixing portion 303 will be exemplified below.

[0084] In a feasible implementation manner, the first fixing portion 201 and the second fixing portion 303 are fixedly connected by brazing; the use of brazing connection can reduce the connection thickness between the cover plate 300 and the insulating ring 200, thereby reducing the external space occupied.

[0085] In another feasible implementation manner, the first fixing portion 201 and the second fixing portion 303 are bonded together by glue. The use of glue bonding has the advantage of convenient connection, thereby improving the installation efficiency of the cover plate 300 and the insulating ring 200 .

[0086] In addition, in other feasible implementations, the first fixing portion 201 and the second fixing portion 303 are hot-melt connected. The use of hot-melt connection has the advantages of strong connection stability and batch processing, which can improve the processing efficiency between the cover plate 300 and the insulating ring 200.

[0087] It is understandable that the specific connection method between the first fixing part 201 and the second fixing part 303 is not limited and can be selected according to actual use requirements. It only needs to ensure that the first fixing part 201 and the second fixing part 303 are fixedly connected.

[0088] It can be understood that the fixed connection between the first fixing portion 201 and the second fixing portion 303 can limit the occurrence of offset between the cover plate 300 and the insulating ring 200, thereby improving the connection strength between the cover plate 300 and the insulating ring 200 to increase the service life of the battery cover plate assembly.

[0089] It should be noted that there are various locations where the first fixing portion 201 can be installed. The locations where the first fixing portion 201 can be installed are described below with examples.

[0090] In a feasible embodiment, the first fixing portion 201 is arranged on the side of the insulating ring 200 away from the battery shell, and the first fixing portion 201 is used to limit the movement of the cover plate 300 toward the side close to the battery shell, thereby guiding the installation position of the cover plate 300 and the insulating ring 200 to reduce the installation difficulty between the cover plate 300 and the insulating ring 200, thereby improving the installation efficiency of the cover plate 300 and the insulating ring 200.

[0091] In another feasible embodiment, the first fixing portion 201 is arranged on the side of the insulating ring 200 facing the battery shell, and the first fixing portion 201 is used to limit the movement of the cover plate 300 toward the side away from the battery shell, thereby guiding the installation position of the cover plate 300 and the insulating ring 200 to reduce the installation difficulty between the cover plate 300 and the insulating ring 200, thereby improving the installation efficiency of the cover plate 300 and the insulating ring 200.

[0092] It can be understood that the setting position of the first fixing part 201 is not limited and can be selected according to actual usage requirements, as long as it is ensured that the first fixing part 201 can abut against the cover plate 300 and limit the movement of the cover plate 300.

[0093] An embodiment of the present application provides a battery, including a battery housing and the battery cover plate assembly provided in the above embodiment, and the battery cover plate assembly is arranged on the battery housing.

[0094] In the battery provided in the embodiment of the present application, the battery cover plate assembly has multiple different functions, and the functions of the battery cover plate assembly will be illustrated by way of example below.

[0095] In a feasible implementation manner, the battery cover plate assembly forms the positive electrode cover plate of the battery, and the positive electrode cover plate is arranged on the battery housing through the insulating ring 200 and the connecting ring 100; the positive electrode cover plate can increase the current-carrying surface of the positive electrode of the battery to improve the current-carrying capacity of the battery, thereby improving the performance of the battery in use.

[0096] In another feasible implementation manner, the battery cover plate assembly forms the negative electrode cover plate of the battery, and the negative electrode cover plate is arranged on the battery housing through the insulating ring 200 and the connecting ring 100; the negative electrode cover plate can increase the current-carrying surface of the negative electrode of the battery to improve the current-carrying capacity of the battery, thereby improving the performance of the battery in use.

[0097] In addition, in another feasible implementation manner, two battery cover plate assemblies are provided. One of the battery cover plate assemblies forms the positive electrode cover plate of the battery, and the positive electrode cover plate is arranged on the battery housing through an insulating ring 200 and a connecting ring 100; the other battery cover plate assembly forms the negative electrode cover plate of the battery, and the negative electrode cover plate is arranged on the battery housing through another insulating ring 200 and another connecting ring 100. Among them, the positive electrode cover plate can increase the current-carrying surface of the positive electrode of the battery to improve the current-carrying capacity of the battery, thereby improving the performance of the battery in use; the negative electrode cover plate can increase the current-carrying surface of the negative electrode of the battery to improve the current-carrying capacity of the battery, thereby improving the performance of the battery in use.

[0098] It can be understood that the specific functions of the battery cover plate assembly are not limited and can be selected according to actual usage requirements.

[0099] It should be noted that the connection between the connecting member and the battery housing is carried out by low-temperature welding. Low-temperature welding can reduce the damage to the electrode core and electrode tab in the battery housing caused by high temperature, so as to protect the electrode core and electrode tab in the battery housing safely, improve the connection efficiency between the battery housing and the connecting member, and thus improve the yield rate of the battery.

[0100] Such as Figure 7As shown in the figure, the battery provided by the embodiment of the present application further includes: an explosion-proof valve 400, which is used to automatically open and release the internal pressure when the internal pressure of the battery abnormally rises, so as to prevent the battery from exploding.

[0101] It should be noted that the explosion-proof valve 400 has a variety of different installation positions. The installation positions of the explosion-proof valve 400 will be illustrated by examples in turn below.

[0102] In a feasible implementation manner, the explosion-proof valve 400 is installed on the negative electrode cover plate. One end of the explosion-proof valve 400 is arranged towards the side away from the negative electrode cover plate, and the other end of the explosion-proof valve 400 extends into the interior of the battery housing. The explosion-proof valve 400 can play a role in preventing the battery from exploding, so as to provide safety protection for the battery.

[0103] In another feasible implementation manner, the explosion-proof valve 400 is installed on the positive electrode cover plate. One end of the explosion-proof valve 400 is arranged towards the side away from the positive electrode cover plate, and the other end of the explosion-proof valve 400 extends into the interior of the battery housing. The explosion-proof valve 400 can play a role in preventing the battery from exploding, so as to provide safety protection for the battery.

[0104] In addition, in other feasible implementation manners, the explosion-proof valve 400 is installed on the battery housing. One end of the explosion-proof valve 400 is arranged towards the side away from the electrode core, and the other end of the explosion-proof valve 400 extends towards the side close to the electrode core. The explosion-proof valve 400 can play a role in preventing the battery from exploding, so as to provide safety protection for the battery.

[0105] It can be understood that the specific installation position of the explosion-proof valve 400 is not limited and can be selected according to actual use requirements.

[0106] The battery provided by the embodiment of the present application further includes: a liquid injection hole 500, which is used to add electrolyte into the interior of the battery housing and prevent the electrolyte inside the battery from overflowing.

[0107] It should be noted that the liquid injection hole 500 has a variety of different installation positions. The installation positions of the liquid injection hole 500 will be illustrated by examples in turn below.

[0108] In a feasible implementation manner, the liquid injection hole 500 is installed on the negative electrode cover plate. One end of the liquid injection hole 500 is arranged towards the side away from the negative electrode cover plate, and the other end of the liquid injection hole 500 extends into the interior of the battery housing. The arrangement of the liquid injection hole 500 can facilitate the operator to add electrolyte into the interior of the battery housing and can prevent the electrolyte inside the battery from overflowing, so as to provide safety protection for the battery.

[0109] In another feasible embodiment, the injection hole 500 is installed on the positive electrode cover plate, one end of the injection hole 500 is set toward the side away from the positive electrode cover plate, and the other end of the injection hole 500 extends into the interior of the battery shell. The setting of the injection hole 500 can facilitate the operator to add electrolyte toward the interior of the battery shell, and can prevent the electrolyte inside the battery from overflowing, so as to safely protect the battery.

[0110] It is understandable that the specific installation position of the injection hole 500 is not limited and can be selected according to actual usage requirements.

[0111] The battery provided in the embodiment of the present application further includes: an electrode, which is used to connect the internal and external circuits of the battery and plays a role in transmitting the current in the circuit and drawing out the voltage.

[0112] It should be noted that the pole has a variety of different installation positions, and the installation positions of the poles are described below with examples.

[0113] In a feasible implementation, the pole is mounted on the negative electrode cover, one end of the pole is arranged toward the side away from the negative electrode cover, and the other end of the pole is electrically connected to the negative electrode cover. The setting of the pole can connect the internal and external circuits of the battery, and play the role of transferring current in the circuit and drawing out the voltage.

[0114] In another feasible embodiment, the pole is installed on the positive cover plate, one end of the pole is arranged toward the side away from the positive cover plate, and the other end of the pole is electrically connected to the positive cover plate. The setting of the pole can connect the internal and external circuits of the battery, and play the role of transferring current in the circuit and drawing out the voltage.

[0115] It is understandable that there is no restriction on the specific installation position of the pole, and it can be selected according to actual use requirements.

[0116] An embodiment of the present application provides a battery pack, including a battery.

[0117] An embodiment of the present application also provides an electrical device, including an electrical device, a battery as described in any of the above embodiments, or a battery pack as described in any of the above embodiments, wherein the battery or the battery pack is used to provide electrical energy to the electrical device.

[0118] The electrical equipment in the embodiments of the present application may be a vehicle, for example, a vehicle may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. Accordingly, the electrical device may be a driving mechanism of the vehicle or a control system of the vehicle.

[0119] In addition, the electrical device can also be other energy storage devices, such as mobile phones, portable devices, laptop computers, electric toys, electric tools, ships, and spacecraft. Among them, the spacecraft can include airplanes, rockets, space shuttles, or spaceships.

[0120] Since the electrical device in this embodiment includes the battery or battery pack described in any of the above embodiments, the electrical device includes the battery or battery pack structure and beneficial effects, which will not be elaborated herein.

[0121] The embodiments or implementation manners in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts among the embodiments can be referred to each other.

[0122] It should be noted that the embodiments referred to as "one embodiment", "embodiment", "exemplary embodiment", "some embodiments", etc. in the specification may include specific features, structures, or characteristics, but not every embodiment necessarily includes the specific feature, structure, or characteristic. In addition, such phrases do not necessarily refer to the same embodiment. Moreover, when combining a specific feature, structure, or characteristic with an embodiment, it is within the knowledge scope of those skilled in the art to implement such a feature, structure, or characteristic in combination with other embodiments, whether explicitly or implicitly described.

[0123] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery cover assembly, characterized in that, A battery housing for installation on a battery, the battery cover assembly comprising: A connecting ring (100) used for connecting the battery housing; An insulating ring (200) connected to the battery housing via the connecting ring (100); A cover plate (300), at least a portion of the cover plate (300) being connected to the inner ring of the insulating ring (200), and the cover plate (300) being connected to a lug of the battery; The cover plate (300) located in the inner ring of the insulating ring (200) has an orthographic projection area S1 on the surface where the outer top wall of the insulating ring (200) is located; The outer ring of the insulating ring (200) has an orthographic projection area S2 on the surface where the outer top wall of the insulating ring (200) is located; S1 and S2 satisfy the following: 1 / 10≤S1 / S2≤1 / 2.

2. The battery cover plate assembly according to claim 1, characterized in that, The cover plate (300) located in the inner ring of the insulating ring (200) has an orthographic projection area S1 on the surface where the outer top wall of the insulating ring (200) is located, which satisfies: S1≥50mm2.

3. A battery cover assembly according to claim 1, characterized in that, The cover plate (300) is at least partially protruded from the insulating ring (200).

4. A battery cover assembly according to claim 1, characterized in that, The cover plate (300) comprises a first part (301) and a second part (302), wherein the second part (302) is connected to the circumference of the first part (301), and a portion of the first part (301) is located in the inner circle of the insulating ring (200).

5. A battery cover assembly according to claim 4, wherein, The first portion (301) is located in the inner ring of the insulating ring (200), and the second portion (302) is arranged to protrude from the insulating ring (200).

6. The battery cover plate assembly according to claim 4, characterized in that, The first portion (301) passes through the inner ring of the insulating ring (200), and at least a portion of the first portion (301) protrudes out of the insulating ring (200).

7. A battery cover assembly according to any one of claims 1-6, characterized in that The insulating ring (200) is formed with a first fixing portion (201), the cover plate (300) is formed with a second fixing portion (303), and the first fixing portion (201) is connected to the second fixing portion (303).

8. The battery cover plate assembly according to claim 7, wherein, The first fixing portion (201) is arranged on a side of the insulating ring (200) facing away from the battery housing; Alternatively, the first fixing portion (201) is arranged on a side of the insulating ring (200) facing the battery housing.

9. A battery, characterized in that, A battery housing and a battery cover assembly according to any one of claims 1 to 8; The battery cover assembly is arranged on the battery housing.

10. A battery pack, characterized in that, A battery comprising the battery of claim 9.

11. An electrical device, characterized in that, It comprises an electrical device, the battery according to claim 9 or the battery pack according to claim 10, wherein the battery or the battery pack is used to provide electrical energy to the electrical device.

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