Electrochemical device and electric equipment

Abstract

The embodiment of the invention relates to the technical field of electrochemical device manufacturing, in particular to an electrochemical device and electric equipment. The electrochemical device comprises a shell, an electrode assembly, a first tab, a pole and insulation paste. The shell comprises a main body and a boss extending from the main body, the boss protrudes out of the main body in the thickness direction of the main body, the main body is provided with a first end face and a second end face which are opposite in the length direction of the main body, the boss is provided with a first wall face and a second wall face which are opposite, and the first end face is flush with the first wall face in the thickness direction of the main body. The main body is further provided with a first surface and a second surface which are opposite, the first surface is connected with the second wall surface, the first surface is used for installing a battery of the mobile phone, the boss is provided with a third surface far away from the main body, and the vertical distance H1 from the third surface to the first surface is larger than or equal to 1.1 mm and smaller than or equal to 1.5 mm. Through the structure, the height difference exists between the first surface and the third surface and is used for installing a battery of a mobile phone, and the space utilization rate is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of electrochemical device manufacturing, and in particular, to an electrochemical device and electrical equipment. Background Art

[0002] With the advancement of science and technology and the advent of the wave of intelligence, smart electrical devices such as smart glasses, smart watches, smart wristbands and temperature patches are becoming more and more popular in people's daily lives. In order to improve the battery life of smart electrical devices, the current market mainstream is to improve the battery charging efficiency to achieve the purpose of improving the battery life of smart electrical devices.

[0003] On the other hand, the battery life of smart power devices can be improved by replacing batteries. However, during the battery replacement process, the smart power devices often need to be shut down, which affects the use. Therefore, more designs add a battery to the smart power devices to ensure that the smart power devices do not need to be shut down when replacing the battery. This type of battery mainly uses soft-pack batteries or steel-shell batteries.

[0004] In the process of realizing the embodiments of the present application, the inventors found that: currently, when adding a battery in a smart electrical device, the battery needs to be manufactured as an ultra-thin battery, and the above-mentioned soft-pack battery needs to be heat-sealed at its ends, which will cause partial space loss when its thickness is thinned, and the folding process on the side of the soft-pack battery is difficult, and it is not easy to make the battery thin; similarly, it is difficult to make the steel shell battery thin because of components such as poles and connecting plates. Summary of the invention

[0005] The present application provides an electrochemical device and electrical equipment to improve the current soft-pack battery, which has the problem that its ends need to be heat-sealed, which will cause partial space loss when the thickness is thinned, and the corner folding process on the side of the soft-pack battery is difficult, making it difficult to make the battery thin; similarly, it is difficult to make the steel shell battery thin due to components such as poles and connecting plates.

[0006] In order to solve the above technical problems, a technical solution adopted by the present application is to provide an electrochemical device. The electrochemical device includes a shell, an electrode assembly, a first pole ear, a pole column and an insulating glue. The shell is provided with a accommodating cavity, the electrode assembly is accommodated in the accommodating cavity, and one end of the first pole ear is connected to the electrode assembly. The shell includes a main body and a boss extending from the main body, along the thickness direction of the main body, the boss protrudes from the main body, the main body is provided with a first cavity, the boss is provided with a second cavity and a first through hole, the second cavity is connected to the first cavity to form the accommodating cavity together, the first through hole is connected to the second cavity, and the electrode assembly is accommodated in the first cavity. Along the length direction of the main body, the main body has a first end face and a second end face opposite to each other, the boss has a first wall face and a second wall face opposite to each other, and the first end face is flush with the first wall face, along the thickness direction of the main body, the main body also has a first surface and a second surface opposite to each other, the first surface is connected to the second wall face, the first surface is used to install the battery of the mobile phone, the boss has a third surface away from the main body, and the vertical distance H1 from the third surface to the first surface satisfies: 1.1 mm ≤ H1 ≤ 1.5 mm. The electrochemical device also includes: a pole and an insulating glue, the pole is accommodated in the second cavity, the insulating glue bonds the pole to the inner surface of the boss and insulates the pole from the boss, and when observed along the thickness direction of the main body, the pole is exposed at the first through hole.

[0007] Optionally, the pole includes a first portion and a second portion extending from the first portion, the insulating glue bonds the first portion to the inner surface of the boss, and the insulating glue insulates the first portion from the boss, the second portion extends out of the first through hole, and there is a gap between the second portion and the wall of the first through hole. With this design, insulating glue is provided between the first portion of the pole and the shell, and there is the gap between the second portion of the pole and the shell, so that the poles with opposite polarities are insulated from the shell to prevent short circuit.

[0008] Optionally, the insulating adhesive is provided with a second through hole, and the second part passes through the second through hole. With this design, it is convenient for the second part to pass through the first through hole and the second through hole.

[0009] Optionally, the first portion is substantially parallel to the second cavity, and the thickness direction of the first portion is the same as the thickness direction of the main body. With this structure, the thickness of the boss can be reduced.

[0010] Optionally, the connection between the second wall and the first surface is rounded, and the radius R of the rounded corner satisfies: 0.1 mm ≤ R ≤ 0.3 mm. This design facilitates production and manufacturing, and can effectively protect the electronic components in the accommodating cavity.

[0011] Optionally, a vertical distance H2 between the second surface and the first surface satisfies: 1.5 mm ≤ H2. Such a design reasonably utilizes the space of the housing and does not cause waste of space.

[0012] Optionally, the material of the shell includes one of aluminum and its alloys, stainless steel or magnesium alloy.

[0013] Optionally, the electrochemical device includes a sealing member, the boss is further provided with a liquid injection port, the liquid injection port is communicated with the second cavity, and the sealing member is provided at the liquid injection port to seal the liquid injection port.

[0014] Optionally, the electrochemical device further includes a circuit board and a second pole ear, one end of the second pole ear is connected to the electrode assembly, the other end of the second pole ear is connected to the shell, the circuit board is arranged outside the main body and located on one side of the first end surface and the first wall surface along the length direction, the circuit board is electrically connected to the pole, and the circuit board is electrically connected to the shell. Through this structure, the first pole ear and the second pole ear are used to input or output current, and the circuit board can be used as a functional circuit board or a protective circuit board of the electrochemical device.

[0015] In order to solve the above technical problems, the present application also provides an electrical equipment, which includes the above electrochemical device.

[0016] The beneficial effects of the present application are: providing an electrochemical device and an electrical equipment, the electrochemical device comprising a housing, an electrode assembly, a first pole ear, a pole column and an insulating glue. The housing is provided with a receiving cavity, the electrode assembly is received in the receiving cavity, and one end of the first pole ear is connected to the electrode assembly. The housing comprises a main body and a boss extending from the main body, the boss protrudes from the main body along the thickness direction of the main body, the main body is provided with a first cavity, the boss is provided with a second cavity and a first through hole, the second cavity is connected to the first cavity to form the receiving cavity together, the first through hole is connected to the second cavity, and the electrode assembly is received in the first cavity. Along the length direction of the main body, the main body has a first end face and a second end face opposite to each other, the boss has a first wall face and a second wall face opposite to each other, and the first end face is flush with the first wall face, along the thickness direction of the main body, the main body also has a first surface and a second surface opposite to each other, the first surface is connected to the second wall face, the first surface is used to install the battery of the mobile phone, the boss has a third surface away from the main body, and the vertical distance H1 from the third surface to the first surface satisfies: 1.1 mm ≤ H1 ≤ 1.5 mm. The electrochemical device also includes: a pole and an insulating glue, the pole is accommodated in the second cavity, the insulating glue adheres the pole to the inner surface of the boss and insulates the pole from the boss, and the pole is exposed at the first through hole when observed along the thickness direction of the main body. Through the above structure, there is a height difference between the first surface and the third surface, so that the battery of the mobile phone can be installed on the first surface. When replacing the battery, it is only necessary to remove the battery from the first surface without disassembling the electrochemical device, so that the electrochemical device can continue to supply power, thereby improving the space utilization rate. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] One or more embodiments are exemplarily described by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and the figures in the drawings do not constitute proportional limitations unless otherwise stated.

[0018] Figure 1 A schematic diagram of an electrical device provided in one embodiment of the present application;

[0019] Figure 2 A three-dimensional diagram of an electrochemical device provided in one embodiment of the present application;

[0020] Figure 3 A schematic diagram of an electrochemical device provided in one embodiment of the present application;

[0021] Figure 4 One embodiment of the present application provides Figure 3A partial cross-sectional view of the A surface;

[0022] Figure 5 This is an exploded view of an electrochemical device provided in one embodiment of the present application.

[0023] The reference numerals of the electric equipment 1000 are as follows.

[0024]

[0025] DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present application, the present application is described in more detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that when an element is described as "fixed to" / "fixed to" / "installed on" another element, it can be directly on the other element, or there can be one or more centered elements therebetween. When an element is described as "connected to" another element, it can be directly connected to the other element, or there can be one or more centered elements therebetween. The terms "vertical", "horizontal", "left", "right", "inside", "outside" and similar expressions used in this specification are for illustrative purposes only.

[0027] Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0028] In addition, the technical features involved in the different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0029] In this specification, the term "installation" includes fixing or restricting a component or device to a specific position or place by welding, screwing, clamping, bonding, etc. The component or device may remain stationary at the specific position or place or move within a limited range. After being fixed or restricted to a specific position or place, the component or device may or may not be disassembled, which is not limited in the embodiments of the present application.

[0030] See also Figure 1, which shows a schematic diagram of an electric device 1000 provided in one embodiment of the present application. Among them, the electric device 1000 includes an electrochemical device 100. It should be understood that in some embodiments of the present application, the electric device 1000 can be any device with a battery and driven by electricity, such as a sweeping robot, a fan, a shaver, an electric vehicle, and the like, and the electric device 1000 in one embodiment of the present application is an intelligent terminal with an embedded system, wherein the intelligent terminal with an embedded system includes a mobile phone, a smart watch, a tablet computer, etc. Next, taking a mobile phone as an example, the specific structure of the electric device 1000 is described. It should also be noted that in order to improve the battery life of the mobile phone, the battery of the mobile phone needs to be replaced, but in the process of replacing the battery, the mobile phone needs to be turned off before it can be replaced, which is inconvenient to use. Therefore, the solution provided in the embodiment of the present application is to add an ultra-thin battery in the mobile phone as a power source when replacing the battery to ensure the use of the mobile phone, and the ultra-thin battery is the electrochemical device 100 provided in the embodiment of the present application.

[0031] For the electrochemical device 100, see Figures 2 to 4 , which respectively show a three-dimensional view of an electrochemical device 100 provided in one embodiment of the present application, a schematic view of an electrochemical device 100 provided in one embodiment of the present application, and a schematic view of an electrochemical device 100 provided in one embodiment of the present application. Figure 3 A partial cross-sectional view of the surface A of the electrochemical device 100, in combination with other drawings. The electrochemical device 100 includes a housing 10, an electrode assembly 20, a first pole ear 30, a pole 40 and an insulating glue 50. The housing 10 is provided with a housing cavity 11, and the electrode assembly 20 is accommodated in the housing cavity 11. One end of the first pole ear 30 is connected to the electrode assembly 20, and the other end of the first pole ear 30 is electrically connected to the pole 40. The housing 10 includes a main body 12 and a boss 13 extending from the main body 12. Along the thickness direction of the main body 12, the boss 13 protrudes from the main body 12. The main body 12 is provided with a first cavity 121, and the boss 13 is provided with a second cavity 131 and a first through hole 132. The second cavity 131 is connected to the first cavity 121 to form the housing cavity 11 together. The first through hole 132 is connected to the second cavity 131, and the electrode assembly 20 is accommodated in the first cavity 121. The pole is accommodated in the second cavity 131, and the insulating glue 50 adheres the pole 40 to the inner surface of the boss 13, and the insulating glue 50 insulates the pole 40 from the boss 13. When observed along the thickness direction of the main body 12, the pole 40 is exposed at the first through hole 132. It is worth mentioning that the electrode assembly 20 is used to store electrical energy and is electrically connected to other electronic devices or electronic components through the first pole ear 30 and the pole 40, and the number of the first pole ear 30 can be multiple, one first pole ear 30 is electrically connected to the battery cell of one electrode assembly 20, and the pole 40 has opposite polarity to the shell 10. Optionally, the material of the shell 10 includes aluminum and its alloy, stainless steel or magnesium alloy.

[0032] It is necessary to explain that the thickness direction, length direction and width direction in the embodiment of the present application are perpendicular to each other, and the length of the electrochemical device 100 in the embodiment of the present application is greater than the width and greater than the thickness.

[0033] It should be noted that after actual tests and measurements, the energy density of soft-pack batteries and steel-shell batteries of the same size was compared. The specific test calculation data are as follows:

[0034] (1) Control group 1 (soft pack battery):

[0035] Soft pack battery shell: thickness 1.5 mm, width 45 mm, length 95 mm;

[0036] Soft-pack cathode electrode area: 3519.79 square millimeters;

[0037] Cell volume: 6412.5 cubic millimeters;

[0038] VED ratio: 0.5498.

[0039] (2) Control group 2 (steel case battery):

[0040] Steel shell battery shell: thickness 1.5 mm, width 45 mm, length 95 mm;

[0041] Steel shell cathode plate area: 3947.53 square millimeters;

[0042] Cell volume: 6625.35 cubic millimeters;

[0043] VED ratio: 0.5958.

[0044] Through the above comparative test, it is known from the data comparison calculation that the energy density ratio of the steel shell battery and the soft pack battery is calculated as follows: steel shell battery VED ratio / soft pack battery VED ratio = 0.5958 / 0.5489 = 108.5%, that is, the energy density gain of the steel shell battery soft pack battery is increased by about 8.5%. Based on the above comparison, it can be concluded that the energy density of the steel shell battery of the same size is greater than that of the soft pack battery. On the other hand, the folding process of the side of the soft pack battery is difficult and it is not easy to produce an ultra-thin battery. Therefore, the electrochemical device 100 in the embodiment of the present application chooses to be based on the improvement of the hard shell battery. It is worth mentioning that in order to design the electrochemical device 100 to be thinner, its thickness will be greatly reduced. If the conventionally designed electrochemical device 100 is used, the pole 40 will extend from the accommodating cavity to the outside of the housing 10 along the length direction or width direction of the electrochemical device 100. However, when the thickness of the electrochemical device 100 is very small, the arrangement of the pole 40 will be affected. Therefore, in the embodiment of the present application, the pole 40 is arranged on the boss 13 protruding from the main body 12 in the thickness direction, which does not affect the arrangement of the pole 40. At the same time, the boss 13 of the embodiment of the present application is arranged at the edge of the main body 12, and the area of ​​the boss 13 is relatively small relative to the area of ​​the main body 12, which will not affect the arrangement and use of the main body 12, thereby providing a larger use space for the electrode assembly 20 accommodated in the main body 12.

[0045] For pole 40 above, see Figure 4, and in combination with other drawings. The pole 40 includes a first part 41 and a second part 42 extending from the first part 41. The insulating glue 50 adheres the first part 41 to the inner surface of the boss 13, and the insulating glue 50 insulates the first part 41 from the boss 13. The second part 42 extends out of the first through hole 132. There is a gap between the second part 42 and the wall of the first through hole 132. The gap is used to prevent the second part 42 from contacting the housing 10 and causing a short circuit. Among them, the first part 41 is used to provide a larger contact area, which is convenient for the electrical connection of multiple first pole ears 30 with the first part 41 on the one hand; on the other hand, by increasing the contact area between the first part 41 and the insulating glue 50, the adhesive area is increased, thereby preventing the pole 40 from being separated from the housing 10. The second part 42 can extend the pole 40 from the first through hole 132, so as to facilitate the electrical connection of the pole 40 with other electronic devices or electronic components. Correspondingly, the insulating glue 50 is provided with a second through hole 51, and the second part 42 passes through the second through hole 51 and extends into the first through hole 132. Optionally, the through hole area of ​​the second through hole 51 is greater than or equal to the first through hole 132, and the second through hole 51 can also be used to provide sealing for the second cavity 131, isolating the second cavity 131 and the first cavity 121 from the external environment. It should be noted that the first portion 41 in the embodiment of the present application is roughly parallel to the second cavity 131, and the thickness direction of the first portion 41 is the same as the thickness direction of the main body 12, wherein the first portion 41 is roughly parallel to the second cavity 131 means that the surface with the largest area is roughly parallel to the surface of the boss 13, and the first portion 41 roughly parallel to the second cavity 131 can effectively reduce the thickness by increasing the area, which is convenient for reducing the thickness of the boss 13 on the one hand, and can effectively facilitate the electrical connection of the first pole ear 30 by increasing the area on the other hand.

[0046] In one embodiment of the present application, please refer to Figure 4 and Figure 5 ,in, Figure 5The exploded view of the electrochemical device 100 provided in one embodiment of the present application is shown, and combined with other drawings. Along the length direction of the main body 12, the main body 12 has a first end face 122 and a second end face 123 opposite to each other, the boss 13 has a first wall face 133 and a second wall face 134 opposite to each other, and the first end face 122 and the first wall face 133 are flush. That is, the boss 13 is arranged at an edge of the main body 12, and when the first end face 122 and the first wall face 133 are flush, the boss 13 and the main body 12 can be formed so that when it is arranged inside the mobile phone, it is convenient to be arranged adjacent to other electronic components. It can be understood that on the surface where the boss 13 protrudes from the main body 12, the main body 12 has a large area that can be used to install other electronic components. For example, the electrochemical device 100 is installed inside the mobile phone, and then the battery of the mobile phone is installed in the area reserved by the main body 12, so as to make full use of the space between the electrochemical device 100 and the housing of the mobile phone.

[0047] Further, please review Figure 2 , and in combination with other drawings. The electrochemical device 100 also includes a circuit board 60 and a second pole ear 70, one end of the second pole ear 70 is connected to the electrode assembly 20, and the other end of the second pole ear 70 is connected to the housing 10, the circuit board 60 is installed on the first end surface 122 and the first wall surface 133, the circuit board 60 is electrically connected to the pole 40, and the circuit board 60 is electrically connected to the housing 10. It can be understood that the second pole ear 70 is opposite to the polarity of the first pole ear 30, the first pole ear 30 is the positive pole, and the second pole ear 70 is the negative pole, that is, the housing 10 electrically connected to the second pole ear 70 is the negative pole. Among them, the circuit board 60 is a protective circuit board, which is used to control and protect the battery cells and circuits in the electrochemical device 100.

[0048] In one embodiment of the present application, please refer to Figure 4 and Figure 5 , and combined with other drawings. Along the thickness direction of the main body 12, the main body 12 has a first surface 124 and a second surface 125 relative to each other, the first surface 124 is connected to the second wall 134, and the shape of the connection between the second wall 134 and the first surface 124 is rounded, and the radius R of the rounded corner satisfies: 0.1 mm ≤ R ≤ 0.3 mm. Combined with the content of the above embodiment, the first surface 124 can be used to install the battery of the mobile phone, or to install other electronic components. On the one hand, in the embodiment of the present application, the rounded corners of the connection can facilitate production and manufacturing; on the other hand, the rounded corners of the connection can protect the battery cell of the electrode assembly 20 inside the accommodating cavity 11, and prevent the sharp edges of the connection between the second wall 134 and the first surface 124 from piercing the battery cell of the electrode assembly 20 during the manufacturing, transportation or use of the electrochemical device 100, thereby preventing safety hazards such as combustion and explosion.

[0049] For the above-mentioned boss 13, please refer to Figure 4 and Figure 5 , and combined with other drawings. Along the thickness direction of the main body 12, the boss 13 has a third surface 135 away from the main body 12, and the vertical distance H1 from the third surface 135 to the first surface 124 satisfies: 1.1 mm ≤ H1 ≤ 1.5 mm. Accordingly, the shape of the connection between the third surface 135 and the second wall 134 is rounded. There is a height difference between the first surface 124 and the third surface 135, so that the battery of the mobile phone can be installed on the first surface 124. When replacing the battery, it is only necessary to remove the battery from the first surface 124 without disassembling the electrochemical device 100, so that the electrochemical device 100 can continue to power the mobile phone, thereby improving the space utilization rate.

[0050] For the main body 12 , a vertical distance H2 between the second surface 125 and the first surface 124 satisfies: 1.5 mm≦H2. That is, the thickness of the boss 13 is smaller than the thickness of the main body 12 .

[0051] In one embodiment of the present application, the electrochemical device 100 includes a sealing member 80, and the boss 13 is further provided with a liquid injection port 136, the liquid injection port 136 is communicated with the second cavity 131, and the sealing member 80 is provided at the liquid injection port 136 to seal the liquid injection port 136. The electrolyte is injected into the accommodating cavity 11 from the liquid injection port 136, and the liquid injection port 136 is sealed by the sealing member 80 after the electrolyte is injected.

[0052] The embodiment of the present application provides an electrochemical device 100, which includes a housing 10, an electrode assembly 20, a first pole ear 30, a pole 40, and an insulating glue 50. The housing 10 is provided with a housing cavity 11, the electrode assembly 20 is accommodated in the housing cavity 11, one end of the first pole ear 30 is connected to the electrode assembly 20, and the other end of the first pole ear 30 is electrically connected to the pole 40. The housing 10 includes a main body 12 and a boss 13 extending from the main body 12, along the thickness direction of the main body 12, the boss 13 protrudes from the main body 12, the main body 12 is provided with a first cavity 121, the boss 13 is provided with a second cavity 131 and a first through hole 132, the second cavity 131 is connected with the first cavity 121 to form the housing cavity 11 together, the first through hole 132 is connected with the second cavity 131, and the electrode assembly 20 is accommodated in the first cavity 121. The pole 40 is accommodated in the second cavity 131, and the insulating glue 50 adheres the pole 40 to the inner surface of the boss 13, and the insulating glue 50 insulates the pole 40 from the boss 13. When viewed along the thickness direction of the main body 12, the pole 40 is exposed at the first through hole 132. Through the above structure, the pole 40 and the electrode assembly 20 are accommodated in the accommodating cavity 11, and in the thickness direction of the main body 12, the minimum thickness of the main body 12 is not limited by the size of the pole 40, which facilitates the lightweight design of the electrochemical device 100.

[0053] Based on the same inventive concept, the embodiment of the present application further provides an electrical device 1000, including an electrochemical device 100, wherein the structure and function of the electrochemical device 100 are consistent with the above contents and will not be described in detail here. Therefore, the electrical device 1000 can also improve the current soft-pack battery, which has the problem that its ends need to be heat-sealed, which will cause partial space loss when its thickness is thinned, and the folding process of the side of the soft-pack battery is difficult, and it is not easy to produce an ultra-thin battery; similarly, the steel shell battery is difficult to be made into an ultra-thin battery due to components such as poles and connecting plates.

[0054] It should be noted that the preferred embodiments of the present application are given in the specification and drawings of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in the specification. These embodiments are not used as additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosure of the present application more thorough and comprehensive. In addition, the above-mentioned technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as the scope of the description of the present application; further, for ordinary technicians in this field, they can be improved or transformed according to the above description, and all these improvements and transformations should belong to the scope of protection of the claims attached to the present application.

Claims

1. An electrochemical device, comprising a housing, an electrode assembly and a first electrode tab, wherein the housing is provided with a receiving cavity, the electrode assembly is received in the receiving cavity, one end of the first electrode tab is connected to the electrode assembly, characterized in that: The housing comprises a main body and a boss extending from the main body, the boss protrudes from the main body along the thickness direction of the main body, the main body is provided with a first cavity, the boss is provided with a second cavity and a first through hole, the second cavity is connected with the first cavity to form the accommodating cavity, the first through hole is connected with the second cavity, and the electrode assembly is accommodated in the first cavity; Along the length direction of the main body, the main body has a first end face and a second end face opposite to each other, the boss has a first wall face and a second wall face opposite to each other, and the first end face is flush with the first wall face, and along the thickness direction of the main body, the main body also has a first surface and a second surface opposite to each other, the first surface is connected to the second wall face, the first surface is used to install the battery of the mobile phone, and the boss has a third surface away from the main body, and the vertical distance H1 from the third surface to the first surface satisfies: 1.1 mm ≤ H1 ≤ 1.5 mm; The electrochemical device further includes: a pole and insulating glue, wherein the pole is received in the second cavity, the insulating glue bonds the pole to the inner surface of the boss and insulates the pole from the boss, and when viewed along the thickness direction of the main body, the pole is exposed at the first through hole.

2. The electrochemical device according to claim 1, characterized in that The pole includes a first part and a second part extending from the first part, the insulating glue bonds the first part to the inner surface of the boss and insulates the first part from the boss, the second part extends out of the first through hole, and there is a gap between the second part and the wall of the first through hole.

3. The electrochemical device according to claim 2, characterized in that The insulating adhesive is provided with a second through hole, and the second part passes through the second through hole.

4. The electrochemical device according to claim 2, characterized in that The first portion is substantially parallel to the second cavity, and a thickness direction of the first portion is the same as a thickness direction of the main body.

5. The electrochemical device according to claim 1, characterized in that The shape of the connection between the second wall surface and the first surface is rounded, and the radius R of the rounded corner satisfies: 0.1 mm≤R≤0.3 mm.

6. The electrochemical device according to claim 5, characterized in that A vertical distance H2 between the second surface and the first surface satisfies: 1.5 mm ≤ H2.

7. The electrochemical device according to any one of claims 1 to 6, characterized in that: The material of the housing includes one of aluminum and its alloy, stainless steel or magnesium alloy.

8. The electrochemical device according to any one of claims 1 to 6, characterized in that: The electrochemical device further comprises a sealing member, the boss is further provided with a liquid injection port, the liquid injection port is communicated with the second cavity, and the sealing member is arranged at the liquid injection port to seal the liquid injection port.

9. The electrochemical device according to claim 1, characterized in that: The electrochemical device also includes a circuit board and a second pole ear, one end of the second pole ear is connected to the electrode assembly, and the other end of the second pole ear is connected to the shell, the circuit board is arranged on the outside of the main body and is located on one side of the first end surface and the first wall surface along the length direction, the circuit board is electrically connected to the pole, and the circuit board is electrically connected to the shell.

10. An electrical equipment comprising the electrochemical device according to any one of claims 1 to 9.

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