Battery, battery pack and electric equipment

Abstract

The embodiment of the utility model provides a battery, a battery pack and electric equipment, and relates to the technical field of batteries. The battery comprises a shell, a pole core and at least one connecting piece, the pole core and the connecting piece are both located in the shell, the connecting piece is in contact with the pole core, and the connecting piece is used for storing electrolyte in the shell and transmitting the electrolyte to the pole core. Therefore, the loss of the electrolyte is reduced, and the electrolyte retention capacity of the battery is improved, so that the cycle life of the battery is prolonged.

Description

Technical Field

[0001] This application relates to the technical field of batteries, and in particular to a battery, a battery pack, and an electrical device. Background Art

[0002] New energy vehicles usually use a battery pack as a power source, and the battery pack includes a plurality of batteries.

[0003] In the prior art, a battery includes a housing, an electrode core, and an electrolyte. The electrode core and the electrolyte are both located in the housing. The electrode core absorbs the electrolyte so that the active ions in the electrolyte penetrate into the electrode core and react with the active substances in the electrolyte, thereby realizing the charging and discharging of the battery.

[0004] However, during the charging and discharging process of the battery, the electrolyte is prone to loss, resulting in a reduction in the cycle life of the battery. Summary of the Utility Model

[0005] This application provides a battery, a battery pack, and an electrical device to solve the problem in the prior art that during the charging and discharging process of the battery, the electrolyte is prone to loss, resulting in a reduction in the cycle life of the battery.

[0006] In a first aspect, a battery provided by this application includes: a housing, an electrode core, and at least one connecting member;

[0007] The electrode core and the connecting member are both located in the housing. The connecting member is in contact with the electrode core, and the connecting member is used to store the electrolyte in the housing and transfer the electrolyte to the electrode core.

[0008] In some embodiments, the connecting member includes at least one absorbing portion. The absorbing portion is in contact with the electrode core, and the absorbing portion is used to absorb and store the electrolyte in the housing and transfer the electrolyte to the electrode core.

[0009] In some embodiments, the connecting member further includes a base layer. The absorbing portion is disposed on the base layer, and the base layer is connected to the inner wall of the housing.

[0010] In some embodiments, the absorbing portion has a plurality of absorbing holes for absorbing the electrolyte.

[0011] In some embodiments, the porosity of the absorbing portion is 20%-80%.

[0012] In some embodiments, the absorbing portion is an absorbing layer covering the base layer.

[0013] In some embodiments, the absorbing portion is a ceramic coating.

[0014] In some embodiments, the thickness of the absorption part is greater than or equal to 3 um and less than or equal to 5 um.

[0015] In some embodiments, the connecting piece is bonded to the inner wall of the housing.

[0016] In some embodiments, the connecting piece includes at least one corner protection part, the housing has at least one first chamfer, the electrode core has a second chamfer, and the corner protection part is located between the first chamfer and the second chamfer.

[0017] In some embodiments, the corner protection part has a groove, and the second chamfer is located in the groove.

[0018] In some embodiments, the side of the corner protection part facing the second chamfer is in contact with the second chamfer.

[0019] In some embodiments, the connecting piece further includes at least one connecting part, the connecting part is connected to the corner protection part, and the connecting part is located between the side surface of the electrode core and the inner side surface of the housing.

[0020] In a second aspect, the present application provides a battery pack, including a housing and at least one battery in any one of the above first aspects, and the battery is located in the housing.

[0021] In a third aspect, the present application provides an electrical device, including a device body and any one of the batteries in the above first aspect or the battery pack in the above second aspect provided on the device body.

[0022] A battery, a battery pack and an electrical device provided by the present application, the battery includes: a housing, an electrode core and at least one connecting piece, and the electrode core and the connecting piece are both located in the housing. By providing a connecting piece in the housing, the connecting piece is used to store the electrolyte in the housing, and the connecting piece is in contact with the electrode core, so that the connecting piece can transfer the stored electrolyte to the electrode core, thereby providing electrolyte for the electrode core. Thereby, the loss of the electrolyte is reduced, the liquid retention amount of the battery is improved, and the cycle life of the battery is thus improved. Description of the Drawings

[0023] The drawings here are incorporated into the description and constitute a part of this description, showing embodiments consistent with the present application, and are used together with the description to explain the principles of the present application.

[0024] Figure 1 It is a schematic structural diagram of the battery provided by the embodiment of the present application;

[0025] Figure 2 is Figure 1 an exploded view of;

[0026] Figure 3 isFigure 1 The first structural schematic diagram of the middle connecting piece;

[0027] Figure 4 is Figure 1 The second structural schematic diagram of the middle connecting piece;

[0028] Figure 5 is Figure 2 The structural schematic diagram of the first shell part in the middle;

[0029] Figure 6 is Figure 5 The structural schematic diagram of the position A in the middle;

[0030] Figure 7 This is the cyclic performance test chart of the battery provided by the embodiment of the present application.

[0031] Through the above-mentioned drawings, the clear embodiments of the present application have been shown, and there will be more detailed descriptions hereinafter. These drawings and text descriptions are not intended to limit the scope of the concept of the present utility model in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0032] Explanation of reference numerals:

[0033] 10 - Battery;

[0034] 100 - Housing;

[0035] 110 - First shell part;

[0036] 120 - Second shell part;

[0037] 130 - First chamfer;

[0038] 200 - Electrode core;

[0039] 210 - Second chamfer;

[0040] 300 - Connecting piece;

[0041] 310 - Base layer;

[0042] 320 - Absorbing part;

[0043] 330 - Corner protection part;

[0044] 331 - Groove;

[0045] 340 - Connecting part. Detailed implementation manners

[0046] Exemplary embodiments will be described in detail below, and examples thereof are shown in the accompanying drawings. When the following description refers to the accompanying drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the appended claims.

[0047] In the prior art, a battery includes a housing, an electrode core, and an electrolyte, and both the electrode core and the electrolyte are located inside the housing. The electrode core absorbs the electrolyte so that the active ions in the electrolyte penetrate into the electrode core and react with the active substances in the electrolyte, thereby realizing the charging and discharging of the battery. The cycle performance of the battery is related to the amount of the electrolyte. Under the same conditions, the higher the retention amount of the electrolyte in the battery, the better the cycle performance of the battery. However, during the charging and discharging process of the battery, the electrolyte is prone to loss, resulting in a reduction in the cycle life of the battery.

[0048] Based on this, an embodiment of the present application provides a battery, including: a housing, an electrode core, and at least one connecting member. Both the electrode core and the connecting member are located inside the housing. By providing the connecting member inside the housing, the connecting member is used to store the electrolyte inside the housing, and the connecting member is in contact with the electrode core so that the connecting member can transfer the stored electrolyte to the electrode core, thereby providing the electrolyte for the electrode core. Thereby, the loss of the electrolyte is reduced, the retention amount of the battery is increased, and thus the cycle life of the battery is improved.

[0049] The embodiments of the present application will be described below with reference to the accompanying drawings.

[0050] Refer to Figures 1 to 6 , the battery provided by the embodiment of the present application includes: a housing 100, an electrode core 200, and at least one connecting member 300. Both the electrode core 200 and the connecting member 300 are located inside the housing 100. The connecting member 300 is in contact with the electrode core 200. The connecting member 300 is used to store the electrolyte inside the housing 100 and transfer the electrolyte to the electrode core 200.

[0051] Among them, the housing 100 has a receiving cavity, and both the electrode core 200 and the connecting member 300 are located inside the receiving cavity.

[0052] The connecting member 300 has a liquid retention function, can store the electrolyte inside the housing 100 and transfer the stored electrolyte to the electrode core 200. The connecting member 300 is in contact with the electrode core 200 to facilitate the connecting member 300 to transfer the electrolyte to the electrode core 200.

[0053] It should be noted that the liquid retention amount of the battery refers to the containment ability of various structures in the battery for the electrolyte. The lower the liquid retention amount of the battery, the smaller the capacity of the battery, and the greater the impact on the cycle life of the battery.

[0054] It can be understood that the housing 100 can be an aluminum-plastic film or an aluminum shell.

[0055] For the battery provided by the embodiment of the present application, by arranging a connecting member 300 inside the housing 100, the connecting member 300 is used to store the electrolyte inside the housing 100, and the connecting member 300 is in contact with the electrode core 200, so that the connecting member 300 can transmit the stored electrolyte to the electrode core 200, thereby providing the electrolyte for the electrode core 200. Thus, the loss of the electrolyte is reduced, the liquid retention amount of the battery is improved, and the cycle life of the battery is thereby increased.

[0056] Referring to Figure 2 and Figure 4 , in some embodiments, the connecting member 300 includes at least one absorption part 320, the absorption part 320 is in contact with the electrode core 200, and the absorption part 320 is used to absorb and store the electrolyte inside the housing 100 and transmit the electrolyte to the electrode core 200.

[0057] Exemplarily, the number and position of the absorption parts 320 can be adaptively set according to actual requirements. Among them, the more the number of the absorption parts 320, the stronger the ability to absorb and store the electrolyte, so that the liquid retention amount of the battery is higher.

[0058] In some embodiments, when the battery is in use, the electrolyte will deposit at the bottom of the housing 100 under the action of its gravity, and the amount of the electrolyte in the upper part of the housing 100 is less. Therefore, the absorption part 320 can be arranged at the bottom of the battery, so that the contact area between the absorption part 320 and the electrolyte inside the housing 100 is larger, thereby facilitating the absorption part 320 to absorb the electrolyte.

[0059] In this way, the absorption part 320 absorbs and stores the electrolyte inside the housing 100, and contacts the electrode core 200 to transmit the stored electrolyte to the electrode core 200, thereby supplementing the electrolyte for the electrode core 200.

[0060] Referring to Figure 2 and Figure 4 , in specific implementation, the connecting member 300 further includes a base layer 310, the absorption part 320 is arranged on the base layer 310, and the base layer 310 is connected to the inner wall of the housing 100.

[0061] Among them, the base layer 310 can be made of any one or at least one of PP material, PE material, a mixture of PP material and PE material, a mixture of PP material and PET material, and a mixture of PE material and PET material. The base layer 310 supported by the above materials has good electrical insulation, high heat resistance, is not easily corroded by the electrolyte, has good acid and alkali resistance, and has good impact resistance.

[0062] Exemplarily, the connection manner between the base layer 310 and the housing 100 can be bonding, snap connection, pin connection or screw connection, etc.

[0063] Thus, by disposing the absorption part 320 on the base layer 310, the base layer 310 provides support for the absorption part 320. The base layer 310 is connected to the inner wall of the housing 100 to fix the base layer 310 on the inner wall of the housing 100, thereby making the base layer 310 relatively stable and reliable, and thus making the position of the absorption part 320 relatively stable.

[0064] In some embodiments, the absorption part 320 has a plurality of absorption holes for absorbing the electrolyte.

[0065] Thus, the electrolyte in the housing 100 is absorbed and stored through the absorption holes on the absorption part 320, and at the same time, the electrolyte is transmitted to the electrode core 200 through the absorption holes.

[0066] In a specific implementation, the porosity of the absorption part 320 is 20%-80%.

[0067] Among them, the larger the porosity of the absorption part 320, the more connected absorption holes there are on the absorption part 320, the stronger the ability of the absorption part 320 to absorb and store the electrolyte, and thus the stronger the liquid retention ability of the connecting member 300 and the higher the liquid retention amount of the battery.

[0068] In some embodiments, the absorption part 320 is an absorption layer covering the base layer 310.

[0069] Among them, the absorption layer absorbs and stores the electrolyte, and can transmit the stored electrolyte to the electrode core 200. The absorption layer is in full contact with the electrode core 200, so that the contact area between the absorption layer and the electrode core 200 is relatively large, thereby facilitating the absorption layer to transmit the electrolyte to the electrode core 200.

[0070] In a specific implementation, the absorption part 320 is a ceramic coating.

[0071] Among them, the connecting member 300 is a double-layer structure composed of the base layer 310 and the ceramic coating. The ceramic coating has a rich pore structure and good electrolyte wettability, which can enhance the liquid absorption and retention ability of the connecting member 300, thereby increasing the liquid retention amount of the battery.

[0072] In addition, the ceramic coating has good thermal stability and high thermal conductivity. By setting the ceramic coating, the high-temperature resistance of the battery can be improved, and at the same time, the expansion of the thermal runaway point in the battery to form an overall thermal runaway can be prevented, improving the safety of the battery.

[0073] In a specific implementation, the thickness of the absorption part 320 is greater than or equal to 3 μm and less than or equal to 5 μm.

[0074] When the thickness of the absorption part 320 is greater than 5 μm, the mass and volume of the absorption part 320 are relatively large, which increases the mass of the battery and reduces the energy density of the battery. When the thickness of the absorption part 320 is less than 3 μm, the absorption and liquid retention capabilities of the absorption part 320 are weak. Therefore, the thickness of the absorption part 320 should be greater than or equal to 3 μm and less than or equal to 5 μm.

[0075] In some embodiments, the connecting member 300 is bonded to the inner wall of the housing 100.

[0076] Among them, the bonding structure is simple and has little impact on the appearance of the housing 100.

[0077] Exemplarily, the connecting member 300 can be fixed to the inner wall of the housing 100 by polymer glue dotting. The polymer glue can be cured at room temperature and has good characteristics such as electrolyte corrosion resistance, water resistance, heat resistance, hydrolysis resistance, acid and alkali resistance, etc.

[0078] To further compare the usage effects of the embodiments of the present application, battery cycle performance tests are carried out by setting the connecting member 300 in the battery and not setting the connecting member 300. Among them, the test environment is a 45°C constant temperature box. One full charge and discharge of the battery is regarded as one cycle, that is, one round. The capacity retention rate is obtained by dividing the discharge capacity of each round by the discharge capacity of the first round. The capacity retention rate of the battery is a percentage that measures the original capacity that the battery can still maintain after being used for a period of time or after a certain number of charge and discharge cycles, and is an important indicator for evaluating the battery life and performance stability. A high capacity retention rate indicates that the battery capacity decays slowly during use and the battery life is long, while a low capacity retention rate indicates that the battery capacity decays quickly and the battery life is short.

[0079] Refer to Figure 7 , Figure 7 is the cycle performance test diagram of the battery provided by the embodiment of the present application. The battery of Embodiment A is provided with a connecting member 300, and the electrolyte is stored through the connecting member 300 and transmitted to the electrode core 200. The battery of Comparative Example B is not provided with a connecting member 300. The batteries of Embodiment A and Comparative Example B are both tested for cycle performance at a charging rate of 0.5C and a discharging rate of 0.5C.

[0080] Through Figure 7 It can be seen that when the cycle number of the battery of Embodiment A is 1777 times, the capacity retention rate is 80%. When the cycle number of the battery of Comparative Example B is 1510 times, the capacity retention rate is 80%. By comparing Embodiment A and Comparative Example B, it can be known that the cycle performance of the battery of Embodiment A is better than that of the battery of Comparative Example B. Thus, it can be seen that by setting the connecting member 300, the cycle performance of the battery can be improved and the cycle life of the battery can be extended.

[0081] Refer to Figure 2 ,Figure 3 , Figure 5 and Figure 6 , in some embodiments, the connecting member 300 includes at least one corner protection portion 330, the housing 100 has at least one first chamfer 130, the electrode core 200 has a second chamfer 210, and the corner protection portion 330 is located between the first chamfer 130 and the second chamfer 210.

[0082] Wherein, there is a gap between the first chamfer 130 and the second chamfer 210, and the corner protection portion 330 is located in the gap between the first chamfer 130 and the second chamfer 210.

[0083] Exemplarily, the corner protection portion 330 is a two-layer structure composed of a base layer 310 and an absorption layer. The corner protection portion 330 can absorb and store the electrolyte and transmit the electrolyte to the electrode core 200.

[0084] In some embodiments, the housing 100 is an aluminum-plastic film. The housing 100 includes a first housing portion 110 and a second housing portion 120. The first housing portion 110 and the second housing portion 120 are oppositely arranged. The first housing portion 110 and the second housing portion 120 are joined to form the housing 100, and both the first housing portion 110 and the second housing portion 120 have the first chamfer 130.

[0085] The housing 100 is a square housing. The number of the first chamfers 130 on the housing 100 is four, and the number of the second chamfers 210 on the electrode core 200 is four. The first chamfers 130 and the second chamfers 210 are in one-to-one correspondence. Therefore, the number of the corner protection portions 330 is set to four, and the corner protection portions 330 are correspondingly located between the first chamfers 130 and the second chamfers 210.

[0086] Specifically, the housing 100 is an aluminum-plastic film. When the aluminum-plastic film is formed by punching a pit, the aluminum layer at the first chamfer 130 is thinner. When the first chamfer 130 is knocked, it is more likely to be dented or even broken. When the first chamfer 130 is dented, it will cause the second chamfer 210 corresponding to the first chamfer 130 to be knocked and powdered. When the first chamfer 130 is broken, it will cause the electrolyte in the housing 100 to leak, affecting the safety performance of the battery. The battery provided by the embodiment of the present application protects the first chamfer 130 of the housing 100 by setting the corner protection portion 330, preventing the first chamfer 130 from being knocked and dented, protecting the second chamfer 210 of the electrode core 200, preventing the second chamfer 210 of the electrode core 200 from being knocked and powdered, and further protecting the electrode core 200 and the housing 100, improving the safety performance of the battery.

[0087] Furthermore, the corner protection portion 330 is fixed at the first chamfer 130 by polymer glue dotting.

[0088] Referring to Figure 2 and Figure 3, in specific implementation, the corner protection part 330 has a groove 331, and the second chamfer 210 is located in the groove 331.

[0089] Among them, by arranging the second chamfer 210 in the groove 331, the contact area between the corner protection part 330 and the second chamfer 210 is larger, and the contact area between the connecting piece 300 and the electrode core 200 is larger, so as to facilitate the connecting piece 300 to transfer the electrolyte to the electrode core 200. In addition, by locating the second chamfer 210 in the groove 331, the second chamfer 210 can be better protected, and thus the electrode core 200 can be better protected.

[0090] Specifically, the corner protection part 330 includes an arc-shaped plate and two side plates. The two side plates are respectively located on both sides of the arc-shaped plate, and the arc-shaped plate and the two side plates jointly define the groove 331.

[0091] In specific implementation, the side of the corner protection part 330 facing the second chamfer 210 is attached to the second chamfer 210.

[0092] Among them, the corner protection part 330 is attached to the second chamfer 210, so as to facilitate the corner protection part 330 to transfer the electrolyte to the second chamfer 210, and at the same time enable the corner protection part 330 to provide better protection for the second chamfer 210.

[0093] In some embodiments, the side of the corner protection part 330 facing the first chamfer 130 is attached to the first chamfer 130, so that there is no extra gap between the first chamfer 130 and the corner protection part 330, which can effectively support the first chamfer 130 of the housing 100 and prevent the first chamfer 130 from being sunken or damaged.

[0094] Refer to Figure 2 and Figure 3 , in some embodiments, the connecting piece 300 further includes at least one connecting part 340. The connecting part 340 is connected to the corner protection part 330, and the connecting part 340 is located between the side surface of the electrode core 200 and the inner side surface of the housing 100.

[0095] Among them, the connecting part 340 is a two-layer structure composed of a base layer 310 and an absorption layer. The connecting part 340 can absorb and store the electrolyte and transfer the electrolyte to the electrode core 200. By arranging the connecting part 340, the liquid retention amount of the connecting piece 300 is increased, so as to increase the liquid retention amount of the battery. At the same time, the connecting part 340 is connected to the corner protection part 330, so that the structure of the connecting piece 300 is relatively stable.

[0096] Exemplarily, the number of the corner protection parts 330 is two, and the connecting part 340 is connected between the two corner protection parts 330.

[0097] In some examples, the number of connecting parts 340 is four, and the number of corner protection parts 330 is four. The connecting parts 340 are connected between two corner protection parts 330 so that the corner protection parts 330 and the connecting parts 340 enclose a square frame, and the electrode core 200 is located inside the square frame. When the battery is in use, since the electrolyte will deposit at the bottom of the housing 100 under its own gravity, there is less electrolyte in the upper part of the housing 100. By enclosing a square frame with the corner protection parts 330 and the connecting parts 340, the square frame is partially located in the upper part of the housing 100 and partially located in the lower part of the housing 100. The electrolyte is transmitted between the absorption layer of the corner protection part 330 and the absorption layer of the connecting part 340 to transfer the electrolyte in the lower part of the housing 100 to the upper part of the housing 100, thereby improving the consistency of the electrolyte in the upper and lower parts of the housing 100, and thus improving the consistency of the electrolyte on the electrode core 200.

[0098] It can be understood that the corner protection part 330 and the connecting part 340 can be integrally formed to facilitate the transmission of the electrolyte between the absorption layer of the corner protection part 330 and the absorption layer of the connecting part 340. The corner protection part 330 and the connecting part 340 can also be separately formed and then connected.

[0099] Specifically, the connecting part 340 is a sheet-like structure, and the connecting part 340 is attached between the side surface of the electrode core 200 and the inner side surface of the housing 100.

[0100] Based on the above embodiments, an embodiment of the present application provides a battery pack, including a housing and at least one battery 10, and the battery 10 is located inside the housing.

[0101] Among them, the structure of the battery 10 has been described in detail in the above embodiments and will not be elaborated here.

[0102] In the battery pack provided by the embodiment of the present application, by providing a connecting member 300 inside the housing 100 of the battery, the connecting member 300 is used to store the electrolyte in the housing 100, and the connecting member 300 is in contact with the electrode core 200 so that the connecting member 300 can transmit the stored electrolyte to the electrode core 200, thereby providing electrolyte for the electrode core 200. Thus, the loss of the electrolyte is reduced, the liquid retention capacity of the battery is improved, and the cycle life of the battery is increased.

[0103] Based on the above embodiments, an embodiment of the present application further provides an electrical device, including a device body and a battery 10 or a battery pack provided on the device body.

[0104] Exemplarily, the electrical device is a vehicle.

[0105] In the description, claims, and the above-mentioned drawings of the embodiments of the present application, terms such as "first", "second", etc. are used to distinguish similar objects and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances so as to implement the embodiments of the present application described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion.

[0106] In the embodiments of the present application, the orientation or positional relationship indicated by terms such as "upper", "lower", "inner", "middle", "outer", "front", "rear", etc. is based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not used to limit that the indicated devices, elements, or components must have a specific orientation or be constructed and operated in a specific orientation. Moreover, in addition to being used to represent the orientation or positional relationship, some of the above terms may also be used to represent other meanings. For example, the term "upper" may also be used to represent a certain attachment relationship or connection relationship in some cases. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present application can be understood according to specific circumstances.

[0107] In addition, the terms "arranged", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or there can be internal communication between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0108] Unless otherwise specified, the term "plurality" means two or more.

[0109] After considering the specification and practicing the application disclosed herein, those skilled in the art will readily conceive of other embodiments of the present application. The present application is intended to cover any variations, uses, or adaptations of the present application that follow the general principles of the present application and include common general knowledge or conventional technical means in the technical field not disclosed in the present application. The specification and embodiments are only regarded as exemplary, and the scope of the present application is only limited by the appended claims.

Claims

1. A battery, characterized in that: include: A housing (100), a pole core (200) and at least one connecting member (300); The pole core (200) and the connecting member (300) are both located in the shell (100); the connecting member (300) is in contact with the pole core (200); the connecting member (300) is used to store the electrolyte in the shell (100) and transfer the electrolyte to the pole core (200).

2. The battery according to claim 1, characterized in that The connecting member (300) comprises at least one absorption portion (320), wherein the absorption portion (320) is in contact with the pole core (200), and the absorption portion (320) is used to absorb and store the electrolyte in the shell (100) and transfer the electrolyte to the pole core (200).

3. The battery according to claim 2, characterized in that The connecting member (300) further comprises a base layer (310), the absorbing portion (320) is arranged on the base layer (310), and the base layer (310) is connected to the inner wall of the shell (100).

4. The battery according to claim 2, characterized in that The absorption part (320) has a plurality of absorption holes for absorbing the electrolyte.

5. The battery according to claim 4, characterized in that The porosity of the absorption part (320) is 20%-80%.

6. The battery according to claim 3, characterized in that The absorption part (320) is an absorption layer covering the base layer (310).

7. The battery according to claim 6, characterized in that The absorption part (320) is a ceramic coating.

8. The battery according to claim 6, characterized in that The thickness of the absorption part (320) is greater than or equal to 3 um and less than or equal to 5 um.

9. The battery according to any one of claims 1 to 8, characterized in that: The connecting piece (300) is bonded to the inner wall of the housing (100).

10. The battery according to any one of claims 1 to 8, characterized in that: The connecting member (300) comprises at least one corner protection portion (330), the shell (100) has at least one first chamfer (130), the pole core (200) has a second chamfer (210), and the corner protection portion (330) is located between the first chamfer (130) and the second chamfer (210).

11. The battery according to claim 10, characterized in that The corner protection portion (330) has a groove (331), and the second chamfer (210) is located in the groove (331).

12. The battery according to claim 10, characterized in that The corner protection portion (330) is in contact with the second chamfer (210) on one side thereof facing the second chamfer (210).

13. The battery according to claim 10, characterized in that The connecting member (300) further comprises at least one connecting portion (340), wherein the connecting portion (340) is connected to the corner protection portion (330), and the connecting portion (340) is located between the side surface of the pole core (200) and the inner side surface of the shell (100).

14. A battery pack, characterized in that: The invention comprises a housing and at least one battery (10) according to any one of claims 1 to 13, wherein the battery (10) is located in the housing.

15. An electrical equipment, characterized in that: The device comprises a device body, and a battery (10) as claimed in any one of claims 1 to 13 or a battery pack as claimed in claim 14, which is arranged on the device body.

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