Battery, battery pack and electric device

Abstract

The utility model relates to a battery, a battery pack and a power utilization device, wherein the battery comprises a shell, and pole columns with opposite polarities are arranged on two sides of a first direction of the shell; the battery cell is arranged in the shell; tabs with opposite polarities are arranged on the same side of the battery cell in the second direction; the pole lugs are electrically connected with the pole columns; the liquid storage unit comprises a first liquid storage unit and a second liquid storage unit, and the first liquid storage unit is arranged in a cavity between the shell and the battery cell; the second liquid storage unit is arranged in the first liquid storage unit and located in a space defined by the first adapter, the shell and the battery cell, the second liquid storage unit is provided with a liquid storage cavity for storing electrolyte, and a microporous membrane is arranged at the bottom of the liquid storage cavity; the bottom supporting plate is used for supporting the battery cell; the bottom supporting plate is provided with a plurality of blind holes formed in the second direction and at least one circulation channel formed in the first direction, and the blind holes are sequentially formed in the first direction and communicate with the circulation channel; and at least one blind hole is in contact with the microporous membrane. According to the battery provided by the utility model, the space in the battery shell is fully utilized.

Description

Technical Field

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

[0002] There are two main technical solutions for square batteries: one with terminals on the same side and the other with terminals on both sides.

[0003] Among them, the technical solution of the two-side pole output refers to that the positive and negative pole covers of the battery are arranged on both sides of the shell. At present, the common design scheme for square batteries with pole output on both sides is: laser welding the adapter to the pole ear of the battery cell and then laser welding to the pole. Although the above design scheme realizes the electrical connection between the pole and the battery cell, the space utilization rate in the battery shell is low.

[0004] Therefore, there is an urgent need to reasonably and efficiently utilize the space in the battery housing to improve the performance of square batteries with terminals on both sides. Utility Model Content

[0005] In view of the deficiencies in the prior art, the utility model discloses a battery, a battery pack and an electrical device.

[0006] The technical solution adopted by the utility model is as follows:

[0007] A battery comprising:

[0008] A shell, wherein a first pole and a second pole with opposite polarities are respectively provided on both sides along a first direction of the shell;

[0009] A battery cell is arranged in the shell; the battery cell is provided with a first pole ear and a second pole ear with opposite polarities on the same side of the second direction; the first direction and the second direction are perpendicular to each other; the first pole ear is electrically connected to the first pole post through a first adapter, and the second pole ear is electrically connected to the second pole post through a second adapter;

[0010] A liquid storage unit, comprising a first liquid storage unit and a second liquid storage unit, wherein the first liquid storage unit is arranged in a cavity between the shell and the battery cell; the second liquid storage unit is arranged in the first liquid storage unit and is located in a space surrounded by the first adapter, the shell and the battery cell, the second liquid storage unit has a liquid storage cavity for storing electrolyte, and a microporous membrane is arranged at the bottom of the liquid storage cavity;

[0011] A bottom support plate supports the battery cell; the bottom support plate has a plurality of blind holes opened along the second direction and at least one flow channel opened along the first direction, wherein the plurality of blind holes are arranged in sequence along the first direction, and the blind holes are connected to the flow channel; wherein at least one of the blind holes is in contact with the microporous membrane.

[0012] In one embodiment of the present invention, the blind hole includes a first connecting cavity and a second connecting cavity, the first connecting cavity is located on the battery core side, the second connecting cavity is located on the flow channel side, and the size of the first connecting cavity gradually decreases toward the second connecting cavity.

[0013] In one embodiment of the present invention, a plurality of the blind holes are distributed on the bottom support plate in an array.

[0014] In one embodiment of the present invention, the height of the blind hole is 30%-80% of the height of the bottom supporting plate.

[0015] In one embodiment of the present invention, the microporous membrane is made of a thermosensitive material.

[0016] In one embodiment of the utility model, the first adapter includes a first connecting section and a second connecting section which are electrically connected and bent in different directions respectively, the first connecting section is connected to the first pole ear, and the second connecting section is connected to the first pole; the distance from the end of the second connecting section close to the second liquid storage unit to the surface of the bottom support plate is h1, the height of the second liquid storage unit is h2, and h1 and h2 satisfy the following relationship: h2 = (80%-99%) × h1.

[0017] In one embodiment of the utility model, a fire extinguishing assembly is further included, and the fire extinguishing assembly is located in a space surrounded by the second adapter, the shell and the battery cell.

[0018] In one embodiment of the present invention, the bottom support plate extends along the first direction to form a support portion, and the support portion supports the fire extinguishing assembly.

[0019] The utility model also provides a battery pack, comprising the battery as described above.

[0020] The utility model also provides an electrical device, comprising the battery pack as described above.

[0021] The above technical solution of the utility model has the following advantages compared with the prior art:

[0022] The battery described in the utility model solves the problem that the existing square battery with poles on both sides cannot fully utilize the space in the battery shell. The microporous membrane at the bottom of the second liquid storage unit is designed to contact with at least one blind hole on the bottom support plate supporting the battery cell. When the internal temperature of the battery rises to reach the critical temperature of the thermosensitive material, the pore size of the microporous membrane increases, and the electrolyte in the second liquid storage unit flows out from the microporous membrane to the blind hole below it, and the electrolyte is absorbed by the battery cell to improve the performance of the square battery. In addition, the coordinated replenishment of the second liquid storage unit and the bottom support plate can reasonably and efficiently utilize the space in the battery shell.

[0023] The battery described in the utility model is also designed with a fire extinguishing component, which further utilizes the space in the battery housing and achieves the purpose of preventing thermal runaway caused by high temperature rise of the pole, timely controlling and reducing safety risks, playing a key role in preventing battery fires. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to make the content of the utility model more clearly understood, the utility model is further described in detail below based on specific embodiments of the utility model in combination with the accompanying drawings.

[0025] Figure 1 It is a cross-sectional view of the battery in the utility model.

[0026] Figure 2 yes Figure 1 A magnified schematic diagram of center A.

[0027] Figure 3 yes Figure 1 A magnified schematic diagram of point B in the middle.

[0028] Figure 4 It is a schematic diagram of the combination of the second liquid storage unit and the bottom support plate in the utility model.

[0029] Figure 5 yes Figure 4 Enlarged schematic diagram of point C in the middle.

[0030] Figure 6 It is a schematic diagram of the bottom support plate of the utility model.

[0031] Figure 7 yes Figure 6 Enlarged schematic diagram of point D in the middle.

[0032] Explanation of the reference numerals in the specification: 100, shell; 101, first side plate; 102, first cover plate; 103, second cover plate; 201, battery cell; 202, first pole ear; 203, second pole ear; 300, first adapter; 301, first connecting section; 302, second connecting section; 400, second adapter; 501, first pole; 502, second pole; 600, first liquid storage unit; 700, second liquid storage unit; 800, bottom support plate; 801, blind hole; 8011, first connecting cavity; 8012, second connecting cavity; 802, circulation channel; 803, support portion; 900, fire extinguishing assembly. DETAILED DESCRIPTION

[0033] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0034] The above and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to the accompanying drawings. The directional terms mentioned in the following embodiments, such as up, down, left, right, front or back, etc., are only the directions of the reference drawings. Therefore, the directional terms used are used to illustrate and not to limit the present invention. In addition, in all embodiments, the same reference numerals represent the same elements.

[0035] Embodiment 1

[0036] Combination Figure 1 , Figure 4 and Figure 5 , a battery comprising:

[0037] The housing 100 is provided with first poles 501 and second poles 502 with opposite polarities on both sides along a first direction of the housing 100;

[0038] The battery cell 201 is disposed in the housing 100; the battery cell 201 is provided with a first pole ear 202 and a second pole ear 203 with opposite polarities on the same side of the second direction; the first direction and the second direction are perpendicular to each other; the first pole ear 202 is electrically connected to the first pole 501 through the first adapter 300, and the second pole ear 203 is electrically connected to the second pole 502 through the second adapter 400;

[0039] The liquid storage unit includes a first liquid storage unit 600 and a second liquid storage unit 700, wherein the first liquid storage unit 600 is disposed in a cavity between the housing 100 and the battery cell 201; the second liquid storage unit 700 is disposed in the first liquid storage unit 600 and is located in a space surrounded by the first adapter 300, the housing 100 and the battery cell 201, and the second liquid storage unit 700 has a liquid storage cavity for storing electrolyte, and a microporous membrane is disposed at the bottom of the liquid storage cavity;

[0040] The bottom support plate 800 supports the battery cell 201; the bottom support plate 800 has a plurality of blind holes 801 opened along the second direction and at least one flow channel 802 opened along the first direction, wherein the plurality of blind holes 801 are sequentially arranged along the first direction, and the blind holes 801 and the flow channel 802 are connected; wherein at least one blind hole 801 is in contact with the microporous membrane.

[0041] The present embodiment provides a battery to solve the problem that the existing square battery with poles on both sides cannot fully utilize the space inside the shell 100. By designing the microporous membrane at the bottom of the second liquid storage unit 700 to contact at least one blind hole 80 on the bottom support plate 800 supporting the battery cell 201, the second liquid storage unit 700 can release the stored electrolyte and replenish the electrolyte to the battery cell 201 through the bottom support plate 800 to improve the performance of the square battery; and the coordinated replenishment of the second liquid storage unit 700 and the bottom support plate 800 can reasonably and efficiently utilize the space inside the shell 100.

[0042] In this embodiment, in order to describe the relationship between the various parts and components, a coordinate system is established with the center point of the housing 100 as the coordinate origin, the direction of the height of the housing 100 as the Y-axis direction, and the direction of the long side of the housing 100 as the X-axis direction. Figure 1 As shown, it can be understood that the first direction refers to the X-axis direction, and the second direction refers to the Y-axis direction.

[0043] In this embodiment, combined with Figures 1 to 3 The shell 100 includes a shell body and a first cover plate 102 and a second cover plate 103 respectively arranged on both sides of the shell body; the first cover plate 102 is provided with a first pole 501, and the second cover plate 103 is provided with a second pole 502. The polarities of the first pole 501 and the second pole 502 are opposite. If the first pole 501 is set as a positive pole, the second pole 502 is set as a negative pole; the first cover plate 102 and the second cover plate 103 are matched to cover the opening of the shell body to isolate the internal environment of the battery from the external environment. Among them, the shell body includes two first side plates 101 arranged oppositely and two second side plates arranged oppositely. The first side plate 101, the second side plate, the first cover plate 102 and the second cover plate 103 jointly define an accommodating space, that is, constitute the shell 100, and the shell 100 provides an accommodating space for the battery cell 201.

[0044] The battery cell 201 is provided with a first pole ear 202 and a second pole ear 203 with opposite polarities on the same side of the second direction. The first pole ear 202 is set as the positive pole ear, and the second pole ear 203 is set as the negative pole ear. The first pole ear 202 is electrically connected to the first pole 501 through the first adapter 300, and the second pole ear 203 is electrically connected to the second pole 502 through the second adapter 400. The first pole 501 and the second pole 502 are used to output or input electrical energy of the battery.

[0045] In this embodiment, the liquid storage unit includes a first liquid storage unit 600 and a second liquid storage unit 700. The first liquid storage unit 600 is used to store electrolyte between the housing 100 and the battery cell 201, and the second liquid storage unit 700 is disposed in the first liquid storage unit 600 and is located in the space surrounded by the first adapter 300, the housing 100 and the battery cell 201. Figure 4 and Figure 5 As shown, the second liquid storage unit 700 has a liquid storage cavity for storing electrolyte, which can transport the electrolyte to the bottom support plate 800 and replenish the battery cell 201 through the blind hole 801 in the bottom support plate 800, thereby improving the performance of the square battery and reasonably and efficiently utilizing the space in the shell 100.

[0046] In this embodiment, combined with Figure 6 and Figure 7 The blind hole 801 includes a first connecting cavity 8011 and a second connecting cavity 8012. The first connecting cavity 8011 is located on the side of the battery core 201, and the second connecting cavity 8012 is located on the side of the flow channel 802. The size of the first connecting cavity 8011 gradually decreases toward the direction of the second connecting cavity 8012, that is, the diameter of the first connecting cavity 8011 close to the battery core 201 is larger than the diameter of the first connecting cavity 8011 close to the second connecting cavity 8012.

[0047] In this embodiment, a plurality of blind holes 801 are distributed in an array on the bottom support plate 800. Specifically, a plurality of blind holes 801 can be arranged in an M×N matrix form, M≥1, N≥1; a plurality of blind holes 801 can also be arranged in a ring form; a plurality of blind holes 801 can also be arranged along a straight line, that is, along a first direction. Of course, along a straight line, a plurality of blind holes 801 can also be arranged in a mixed array, that is, three different types of matrix form, ring form, and straight line form are arranged in a mixed manner; it can be understood that those skilled in the art can arrange different shapes and sizes according to design requirements, and the spacing between the plurality of blind holes 801 can be adjusted according to requirements. Since the blind holes 801 are opened along the second direction, that is, the direction of the height of the bottom support plate 800, and the circulation channel 802 is opened along the first direction, that is, the direction of the long side of the bottom support plate 800, the circulation channel 802 can connect the plurality of blind holes 801 on the same straight line to achieve different electrolyte circulation and infiltration effects. Preferably, considering the actual production situation, the plurality of blind holes 801 are arranged in an M×N matrix form and are evenly distributed.

[0048] In this embodiment, the height of the blind hole 801, i.e., the sum of the heights of the first communication cavity 8011 and the second communication cavity 8012, is 30%-80% of the height of the bottom support plate 800. It should be noted that the smaller the height of the blind hole 801, the worse the capillary effect (referring to the phenomenon of the electrolyte rising or falling in the tiny pores), and it is difficult to suck the electrolyte upward through the blind hole 801 to the battery cell 201; the larger the height of the blind hole 801, the longer the flow path of the electrolyte, and when the battery cell 201 is fully infiltrated by the electrolyte sucked upward through the blind hole 801, the blind hole 801 may still store electrolyte, which is easy to cause waste of electrolyte.

[0049] In order to ensure that the electrolyte in the second liquid storage unit 700 is transported to the bottom support plate 800, a microporous membrane is provided at the bottom of the second liquid storage unit 700, and the bottom support plate 800 has at least one blind hole 801 in contact with the microporous membrane at the bottom of the second liquid storage unit 700. In this embodiment, the microporous membrane is made of a thermosensitive material, such as a thermosensitive polymer material such as poly N-isopropylacrylamide (PNIPAAm), polyoxyethylene ether or cellulose copolymer. When the internal temperature of the battery rises to the critical temperature of the thermosensitive material (45°C-55°C), the pore size of the microporous membrane increases, and the electrolyte in the second liquid storage unit 700 flows out of the microporous membrane into the blind hole 801 below it.

[0050] Taking PNIPAAm as an example, the following two situations are described for the controlled release of electrolyte by the second liquid storage unit 700: when the internal temperature of the battery is lower than the critical temperature, the surface of the microporous membrane made of PNIPAAm will shrink, causing the surface hydration layer to shrink and form a thin dense cortex. This dense cortex prevents the electrolyte in the second liquid storage unit 700 from being released outward; when the internal temperature of the battery rises and reaches the critical temperature of the PNIPAAm material, the surface cortex of the microporous membrane made of PNIPAAm swells and the pore size of the microporous membrane increases. At this time, the electrolyte in the second liquid storage unit 700 can be released from the second liquid storage unit 700, and the electrolyte can smoothly diffuse into the blind hole 801 of the bottom support plate 800, thereby achieving the purpose of controlled release.

[0051] The working principle of this embodiment is as follows:

[0052] The electrolyte is injected into the battery, the injected electrolyte is absorbed by the battery cell 201 , and a portion of the electrolyte is stored in the liquid storage cavity of the second liquid storage unit 700 .

[0053] In the later stage of the battery cycle, when the internal temperature of the battery rises and reaches the critical temperature of the thermosensitive material, the surface cortex of the microporous membrane swells and the pore size of the microporous membrane increases. At this time, the electrolyte in the second liquid storage unit 700 can be released from the second liquid storage unit 700, that is, the liquid storage cavity of the second liquid storage unit 700 is opened, and a part of the stored electrolyte flows into the bottom support plate 800, so that the battery cell 201 absorbs the electrolyte from the blind hole 801 of the bottom support plate 800, and infiltrates into the battery cell 201 through capillary action, thereby increasing the battery life and improving the battery performance.

[0054] In this embodiment, the first adapter 300 includes a first connecting section 301 and a second connecting section 302 that are electrically connected and bent along different directions respectively. The first connecting section 301 extends along the first direction and is connected to the first pole ear 202. The second connecting section 302 extends along the second direction and is connected to the first pole 501. The second liquid storage unit 700 is located in the cavity below the second connecting section 302.

[0055] like Figure 2As shown, the distance from the end of the second connecting section 302 close to the second liquid storage unit 700 to the surface of the bottom support plate 800 is h1, and the height of the second liquid storage unit 700 is h2, and h1 and h2 satisfy the following relationship: h2 = (80%-99%) × h1. It should be noted that the smaller the height of the second liquid storage unit 700, the less electrolyte stored in the liquid storage cavity; the higher the height of the second liquid storage unit 700, the denser the internal structure, and the greater the difficulty of production and manufacturing. Therefore, the height of the second liquid storage unit 700 needs to satisfy the above relationship, which not only meets the storage of an appropriate amount of electrolyte, but also reduces the difficulty of production and manufacturing.

[0056] Embodiment 2

[0057] Due to the chemical characteristics inside the battery, the battery may overheat, short circuit, or even cause a fire when operating abnormally.

[0058] In order to solve the above problems, this embodiment provides a battery.

[0059] Based on the first embodiment, Figure 3 As shown, the battery also includes a fire extinguishing assembly 900 disposed in the shell 100. When the second liquid storage unit 700 is disposed in the space below the first adapter 300, that is, close to the first pole 501, the fire extinguishing assembly 900 is disposed in the space below the second adapter 400, that is, close to the second pole 502, so as to make full use of the space below the second adapter 400.

[0060] The fire extinguishing assembly 900 includes a fire detecting tube and a fire extinguishing nozzle (not shown in the figure) connected to the fire detecting tube. The fire extinguishing agent is stored in the fire detecting tube, and a pressure sensing element is provided in the fire extinguishing nozzle.

[0061] Furthermore, a coordinate system is established with the height direction of the bottom support plate 800 as the Y-axis direction and the long side direction of the bottom support plate 800 as the X-axis direction, such as Figure 6 As shown, similarly, the first direction refers to the X-axis direction, and the second direction refers to the Y-axis direction. The bottom support plate 800 extends along the length direction of the bottom support plate 800, i.e., the first direction, to form a support portion 803, and the support portion 803 supports the fire extinguishing assembly 900. The bottom support plate 800 can not only prevent the battery cell 201 from contacting with the bottom wall of the housing 100, but also play a role in vibration buffering for the battery cell 201. At the same time, the bottom support plate 800 can also prevent the fire extinguishing assembly 900 from contacting with the bottom wall of the housing 100, and also play a role in vibration buffering for the fire extinguishing assembly 900.

[0062] Specifically, the shell of the fire sprinkler is usually made of high-strength, corrosion-resistant metal materials such as stainless steel or aluminum alloy. The shell is designed to protect the internal fire extinguishing device from the external environment and has certain explosion-proof properties to ensure that no secondary damage is caused to the surrounding environment during the fire extinguishing process.

[0063] Among them, the core part of the fire sprinkler is the internal fire extinguishing device. The fire sprinkler is usually composed of a fire extinguishing agent storage container, a pressure sensor and a nozzle.

[0064] Specifically, fire extinguishing agent storage containers are usually made of lightweight, high-strength materials to ensure that the fire extinguishing agent can be quickly released when extinguishing a fire. Commonly used fire extinguishing agents include dry powder, gas, etc., and the choice depends on the applicability of the fire extinguishing agent to lithium battery fires.

[0065] Fire sprinklers are usually equipped with pressure sensors to monitor pressure changes inside the storage container. Once an abnormality occurs in the battery, causing the pressure inside the fire extinguishing agent storage container to increase, the pressure sensor will quickly detect this change and trigger the fire extinguishing system, starting the fire sprinkler to release the fire extinguishing agent.

[0066] The nozzle is a key component for releasing the fire extinguishing agent to the fire source. The design of the nozzle needs to consider both the uniform spraying of the fire extinguishing agent and the release of the fire extinguishing agent without damaging the lithium battery and its surrounding equipment, so as to meet the requirements of high efficiency and safety of fire extinguishing.

[0067] From the above, it can be seen that the fire extinguishing assembly 900, as an important component of the battery safety system, prevents the high temperature rise of the pole from causing thermal runaway, controls it in time, reduces safety risks, and plays a key role in preventing battery fires.

[0068] Embodiment 3

[0069] This embodiment also provides a battery pack, including the battery provided in the first or second embodiment.

[0070] This embodiment includes all the technical features of the first or second embodiment. Therefore, the beneficial effects of the first or second embodiment should also be possessed by this embodiment.

[0071] Embodiment 4

[0072] This embodiment also provides an electric device, including the battery pack provided in Embodiment 3. The main design point of the present invention is the structural improvement of the battery, and other structures of the electric device, such as the electrical connection part and the mechanical structure part of the electric device, will not be described in detail.

[0073] Electrical equipment may be automobiles, portable devices, laptops, ships, spacecraft, electric toys, and electric tools, etc. Automobiles may be fuel-powered, gas-powered, or new energy vehicles, and new energy vehicles may be pure electric vehicles, hybrid vehicles, or extended-range vehicles, etc.; spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc.; electric toys include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc.; electric tools include metal cutting electric tools, grinding electric tools, assembly electric tools, and railway electric tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc.

[0074] In the description of the embodiments of the present utility model, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0075] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A battery, characterized in that: include: A shell (100), wherein a first pole (501) and a second pole (502) with opposite polarities are respectively provided on both sides along a first direction of the shell (100); A battery cell (201) is arranged in the housing (100); the battery cell (201) is provided with a first pole lug (202) and a second pole lug (203) with opposite polarities on the same side of the second direction; the first direction and the second direction are perpendicular to each other; the first pole lug (202) is electrically connected to the first pole post (501) via a first adapter (300), and the second pole lug (203) is electrically connected to the second pole post (502) via a second adapter (400); A liquid storage unit, comprising a first liquid storage unit (600) and a second liquid storage unit (700), wherein the first liquid storage unit (600) is arranged in a cavity between the shell (100) and the battery cell (201); the second liquid storage unit (700) is arranged in the first liquid storage unit (600) and is located in a space surrounded by the first adapter (300), the shell (100) and the battery cell (201), and the second liquid storage unit (700) has a liquid storage cavity for storing electrolyte, and a microporous membrane is arranged at the bottom of the liquid storage cavity; A bottom support plate (800) supports the battery cell (201); the bottom support plate (800) has a plurality of blind holes (801) opened along the second direction and at least one flow channel (802) opened along the first direction, wherein the plurality of blind holes (801) are arranged in sequence along the first direction, and the blind holes (801) and the flow channel (802) are connected; wherein at least one of the blind holes (801) is in contact with the microporous membrane.

2. The battery according to claim 1, characterized in that The blind hole (801) comprises a first connecting cavity (8011) and a second connecting cavity (8012), wherein the first connecting cavity (8011) is located on the side of the battery core (201), and the second connecting cavity (8012) is located on the side of the circulation channel (802), and the size of the first connecting cavity (8011) gradually decreases toward the second connecting cavity (8012).

3. The battery according to claim 1, characterized in that The plurality of blind holes (801) are distributed in an array on the bottom support plate (800).

4. The battery according to claim 1, characterized in that The height of the blind hole (801) is 30%-80% of the height of the bottom supporting plate (800).

5. The battery according to claim 1, characterized in that The microporous membrane is made of a heat-sensitive material.

6. The battery according to claim 1, characterized in that The first adapter (300) comprises a first connecting section (301) and a second connecting section (302) which are electrically connected and bent in different directions, respectively, the first connecting section (301) being connected to the first pole lug (202), and the second connecting section (302) being connected to the first pole (501); the distance from the end of the second connecting section (302) close to the second liquid storage unit (700) to the surface of the bottom support plate (800) is h1, the height of the second liquid storage unit (700) is h2, and h1 and h2 satisfy the following relationship: h2=(80%-99%)×h1.

7. The battery according to claim 1, characterized in that It also includes a fire extinguishing component (900) disposed in the shell (100), and the fire extinguishing component (900) is located in a space surrounded by the second adapter (400), the shell (100) and the battery cell (201).

8. The battery according to claim 7, characterized in that The bottom support plate (800) extends along the first direction to form a support portion (803), and the support portion (803) supports the fire extinguishing assembly (900).

9. A battery pack, characterized in that: Comprising a battery as claimed in any one of claims 1 to 8.

10. An electrical device, characterized in that: Comprising the battery pack as claimed in claim 9.

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