Battery

Abstract

The utility model provides a battery. The battery comprises a battery main body, the heat preservation assembly covers the outer side of the circumferential side wall and the outer side of the end part of the battery main body; the packaging assembly is arranged on one side, far away from the battery main body, of the heat preservation assembly, the packaging assembly comprises a heat insulation plate connected with the heat preservation assembly, and the orthographic projection of the heat insulation plate on the surface of the battery main body at least partially coincides with the end part of the battery main body. According to the battery provided by the invention, the thermal insulation plate is arranged on the outer side of the thermal insulation assembly, and the thermal insulation plate can at least cover partial area of the end part of the battery main body. And on the basis of the heat preservation assembly, the heat insulation plate can further delay the loss of heat from the end part of the battery main body. When the heat loss at the end part of the battery is less, even if the battery is in a low-temperature environment, the heat in the heat preservation assembly is enough to maintain the temperature required by normal charging and discharging of the battery, so that the normal use of the battery can be ensured, and the efficiency reduction of the battery in the low-temperature environment is prevented.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a battery. Background Art

[0002] With the increasing prevalence of electrical appliances, the demand for electricity has also increased. Typically, this energy is stored in batteries, which provide a stable supply of power to appliances during use. Currently, the optimal operating temperature for batteries is around 25°C. If the ambient temperature is too low, the battery's power supply stability will be affected, resulting in a decrease in battery efficiency. Utility Model Content

[0003] In view of this, the purpose of the present application is to provide a battery to at least partially solve the problem of reduced energy efficiency of the battery in a low-temperature environment.

[0004] Based on the above-mentioned purpose, the present application provides a battery, comprising: a battery body; a thermal insulation component, which is coated on the outer side of the circumferential side wall and the outer side of the end of the battery body; a packaging component, which is arranged on the side of the thermal insulation component away from the battery body, and the packaging component includes an insulation plate connected to the thermal insulation component, and the orthographic projection of the insulation plate on the surface of the battery body at least overlaps with the end portion of the battery body.

[0005] Optionally, the insulation board is provided with a protruding connection portion on the board surface facing the insulation component, and the insulation component is provided with a connection groove matching the connection portion on the surface facing the insulation board, and the connection portion is detachably connected to the insulation component through the connection groove.

[0006] Optionally, the connecting portion has a closed ring shape as its orthographic projection on the surface of the insulation board, and an annular sealing groove extending along the connecting portion is provided at the end of the connecting portion facing the insulation component, and an elastic sealing member matching the sealing groove is connected to the bottom of the connecting groove; when the insulation board is connected to the insulation component, the elastic sealing member abuts against the bottom of the sealing groove.

[0007] Optionally, at least one side wall of the sealing groove is provided with an accommodating space for accommodating part of the elastic sealing member.

[0008] Optionally, the groove wall of the sealing groove includes an inclined sub-wall close to the groove bottom of the sealing groove, the inclined sub-wall is inclined toward the groove bottom of the sealing groove, and the accommodating space is formed between the inclined sub-wall and the groove bottom of the sealing groove.

[0009] Optionally, a heating cavity is provided inside the connecting portion, an electric heating component is installed in the heating cavity, and the electric heating component is electrically connected to the battery body.

[0010] Optionally, the electric heating assembly includes an electric heating wire electrically connected to the battery body, and a heat conducting sheet spirally wound around the electric heating wire, wherein the heat conducting sheet and the electric heating wire are thermally connected.

[0011] Optionally, the orthographic projection of the connecting portion on the surface of the insulation board is in the shape of a circular ring, and the connecting portion is threadedly connected to the insulation component through the connecting groove.

[0012] Optionally, the packaging component includes a first thermal insulation layer, and a first mounting groove is provided on the surface of the thermal insulation board facing the thermal insulation component, and the first thermal insulation layer is detachably connected to the thermal insulation board through the first mounting groove; when the thermal insulation board is connected to the thermal insulation component, the first thermal insulation layer abuts against the surface of the thermal insulation component.

[0013] Optionally, the battery includes a sealing gasket, and a second mounting groove is provided on the surface of the insulation component facing the insulation plate, and the sealing gasket is connected to the insulation component through the second mounting groove; when the insulation plate is connected to the insulation component, the sealing gasket abuts against the surface of the insulation plate.

[0014] As can be seen from the above, the battery provided by this application has an insulation plate provided on the outside of the insulation assembly, and the insulation plate can cover at least a portion of the end area of the battery body. On the basis of the insulation assembly, the insulation plate can further delay the loss of heat from the end of the battery body. When the heat loss at the end of the battery is small, even if the battery is in a low-temperature environment, the heat inside the insulation assembly is sufficient to maintain the temperature required for normal charging and discharging of the battery, which can ensure the normal use of the battery and prevent the battery from performing poorly in a low-temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in this application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are merely embodiments of this application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0016] Figure 1 A schematic diagram of a battery according to an embodiment of the present application;

[0017] Figure 2 A schematic cross-sectional view of a battery according to an embodiment of the present application;

[0018] Figure 3 for Figure 2 An enlarged schematic diagram of part A in FIG;

[0019] Figure 4 This is a schematic diagram of an explosion of a battery according to an embodiment of the present application.

[0020] Description of reference numerals:

[0021] 100. Battery body; 110. Avoidance groove;

[0022] 200, insulation assembly; 210, insulation sleeve; 220, upper sealing sheet; 221, connection groove; 222, elastic sealing member; 223, second mounting groove; 224, groove; 230, metal cap;

[0023] 300, packaging component; 310, insulation board; 311, connection portion; 312, sealing groove; 313, accommodation space; 314, heating chamber; 315, inclined sub-wall; 316, first mounting groove; 317, through hole; 320, electric heating component; 321, electric heating wire; 322, thermal conductive sheet; 330, first insulation layer;

[0024] 400. Sealing gasket. DETAILED DESCRIPTION

[0025] In order to make the objectives, technical solutions and advantages of this application more clear, this application is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0026] It should be noted that the relative arrangement of the components, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise.

[0027] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0028] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0029] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present application should have the usual meanings understood by people with ordinary skills in the field to which this application belongs. The "first", "second" and similar words used in the embodiments of the present application do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0030] like Figure 1 , Figure 1 A battery according to an embodiment of the present application is shown.

[0031] For example, the battery may be a cylindrical battery.

[0032] For example, the battery can be a sodium-ion battery. Sodium ion resources are abundant and relatively low-cost, making them promising for widespread application in the energy storage field. However, sodium-ion batteries for energy storage face different application environments than lithium-ion batteries, placing higher demands on their high and low-temperature charge and discharge capabilities, rate performance, and cycle stability.

[0033] like Figure 2 , Figure 2 Shown Figure 1 A schematic cross-sectional view of a battery in FIG. In some embodiments, the battery includes a battery body 100, which includes circumferential sidewalls and end portions. To ensure normal operation of the battery in low-temperature environments, the battery also includes a thermal insulation assembly 200, which is coated on the outer sides of the circumferential sidewalls of the battery body 100 and the outer sides of the end portions of the battery body 100.

[0034] For example, the battery body 100 may include a housing made of copper, aluminum, or steel. The housing contains an electrode assembly and an electrolyte. The electrode assembly may be a component in the battery body 100 that generates an electrochemical reaction to achieve reversible charge and discharge.

[0035] One end of the housing is closed, and an electrode terminal is mounted on the closed end, which is sealed and insulated from the housing. The other end of the housing is open, and a cover plate is mounted on the open end to seal the open end. The cover plate is insulated and sealed from the housing. The electrode assembly includes a first tab and a second tab of opposite polarity. The first tab is electrically connected to the cover plate, and the second tab is electrically connected to the electrode terminal. For example, the electrode terminal can be positively charged and serve as the positive terminal of the battery body 100, while the cover plate is negatively charged and serves as the negative terminal of the battery body 100.

[0036] Illustratively, the heat preservation assembly 200 includes a heat transfer wire (not shown) wound around the peripheral side wall of the battery body 100 . The heat transfer wire can convert electrical energy into thermal energy, thereby heating the peripheral side wall of the battery body 100 .

[0037] For example, the heat transfer wire can be electrically connected to the battery body 100 to provide power to the heat transfer wire through the battery body 100; the heat transfer wire can also be electrically connected to an external circuit other than the battery body 100 to provide power to the heat transfer wire through the external circuit.

[0038] Exemplarily, the insulation component 200 also includes an insulation sleeve 210 and an upper packaging sheet 220. The insulation sleeve 210 at least covers the circumferential side wall of the battery body 100 (for example, the cover of the battery body 100 can be exposed, or at least a portion of the insulation component 200 is electrically connected to the cover of the battery body 100). The upper packaging sheet 220 is connected to the upper end of the insulation sleeve 210 and seals the opening at the upper end of the insulation sleeve 210. A metal cap 230 is insulated and installed in the middle of the upper packaging sheet 220. The metal cap 230 is connected to the exposed end of the electrode terminal, so that while the insulation component 200 insulates the battery body 100, it can also ensure that the battery body 100 can provide electrical energy to the external circuit or external device.

[0039] The heat transfer wire is disposed between the thermal insulation jacket 210 and the battery body 100. For example, the heat transfer wire can be electrically connected to the metal cap 230 and the cover plate, respectively, so that the battery body 100 provides electrical energy to the heat transfer wire.

[0040] The applicant's research found that although the heat transfer wire can heat the peripheral side wall of the battery body 100, and the thermal insulation layer can delay the loss of heat to the outside. However, since the heat transfer wire is only wrapped around the peripheral side wall of the battery body 100, it cannot heat the end of the battery body 100. Although a part of the heat generated by the heat transfer wire will be conducted to the end of the battery body 100, since the thickness of the upper packaging sheet 220 of the thermal insulation component 200 covering the end of the battery body 100 is relatively thin, when the temperature outside the upper packaging sheet 220 is low, the heat transferred to the end of the battery body 100 is not easy to maintain and can easily be lost through the upper packaging sheet 220. At the same time, during the use of the battery body 100, the heat generated at the end where the electrode terminal is provided is greater, and accordingly, the heat loss at this end is also greater. Reducing the heat loss at this end can more effectively improve the low-temperature performance of the battery.

[0041] like Figure 3 , Figure 3 Shown Figure 2 To improve the above problem, in some embodiments, the battery further includes a packaging assembly 300, which is disposed on a side of the thermal insulation assembly 200 away from the battery body 100. The packaging assembly 300 includes a thermal insulation plate 310 connected to the thermal insulation assembly 200, and the orthographic projection of the thermal insulation plate 310 on the surface of the battery body 100 at least partially overlaps with the end portion of the battery body 100.

[0042] Illustratively, the upper surface of the upper packaging sheet 220 of the thermal insulation assembly 200 (i.e., the surface facing away from the battery body 100) is provided with a groove 224 for accommodating the thermal insulation plate 310. The upper plate surface of the thermal insulation plate 310 can be flush with the upper surface of the upper packaging sheet 220 to prevent the thermal insulation plate 310 from excessively obstructing the metal cap 230 along the axial direction of the metal cap 230, thereby helping to ensure reliable electrical connection between the battery and the external circuit.

[0043] Illustratively, the orthographic projection of the thermal insulation plate 310 on the surface of the battery body 100 completely covers the end of the battery body 100 , so as to improve the heat preservation effect of the thermal insulation plate 310 on the battery body 100 .

[0044] Illustratively, the insulation board 310 is fixedly connected to the insulation assembly 200 to improve the connection reliability between the two; or, the insulation board 310 is detachably connected to the insulation assembly 200 to facilitate separate maintenance of the insulation board 310 or the insulation assembly 200.

[0045] Illustratively, the thermal insulation plate 310 is close to the bottom end and / or the top end of the battery body 100 (the top end of the battery body 100 is the end where the electrode terminals are provided, and the bottom end is opposite to the top end).

[0046] Illustratively, a through hole 317 is provided in the middle of the insulation plate 310 for the metal cap 230 to pass through. The metal cap 230 is transitionally fitted or interference fit with the through hole 317 to reduce the gap between the insulation plate 310 and the metal cap 230, which helps to delay the loss of heat from the end of the battery body 100.

[0047] In this embodiment, heat conducted to the ends of the battery body 100 must pass through the thermal insulation assembly 200, the space between the thermal insulation assembly 200 and the thermal insulation plate 310, and the thermal insulation plate 310 before being transferred to the outside world. Compared to a structure where only the thermal insulation assembly 200 is installed at the ends of the battery body 100, this structure can further slow down heat loss from the ends of the battery.

[0048] The battery provided in the embodiment of the present application has an insulation plate 310 disposed on the outside of the insulation assembly 200. The insulation plate 310 can cover at least a portion of the end of the battery body 100. Based on the insulation assembly 200, the insulation plate 310 can further slow the loss of heat from the end of the battery body 100. When heat loss from the battery end is low, even in a low-temperature environment, the heat inside the insulation assembly 200 is sufficient to maintain the temperature required for normal battery charging and discharging, thereby ensuring normal use of the battery and preventing the battery from performing poorly in low-temperature environments.

[0049] like Figure 3In some embodiments, a protruding connection portion 311 is provided on the plate surface of the insulation plate 310 facing the thermal insulation component 200, and a connection groove 221 matching the connection portion 311 is provided on the surface of the thermal insulation component 200 facing the insulation plate 310, and the connection portion 311 is detachably connected to the thermal insulation component 200 through the connection groove 221.

[0050] Exemplarily, the connection groove 221 is arranged on the upper packaging sheet 220 of the insulation component 200. Since the upper packaging sheet 220 is located at the end of the battery body 100, the space of the upper packaging sheet 220 facing the insulation plate 310 is relatively sufficient, and it is more reasonable to arrange the connection groove 221 on the upper packaging sheet 220.

[0051] Illustratively, the connection portion 311 can be plugged, snap-fitted, or threadedly connected to the thermal insulation assembly 200 through the connection groove 221 .

[0052] For example, Figure 3 On the surface of the upper packaging sheet 220 of the thermal insulation assembly 200 that faces the battery body 100, a protrusion is formed toward the battery body 100 at a position corresponding to the connection groove 221. Accordingly, a relief groove 110 is provided at the top of the battery body 100 to match the protrusion. Designing the connection groove 221 as a recessed structure facing the battery body 100 avoids the problem of the metal cap 230 being blocked by the outwardly protruding structure on the upper packaging sheet 220, helping to ensure reliable electrical connection between the battery and the external circuit.

[0053] The connecting portion 311 is connected to the insulation assembly 200 through the connecting groove 221, which can prevent the insulation plate 310 and the insulation assembly 200 from separating from each other, ensuring that the insulation plate 310 can reliably insulate the ends of the battery so that the battery can be charged and discharged normally in a low temperature environment.

[0054] At the same time, since the insulation plate 310 and the insulation component 200 are detachably connected, when the insulation plate 310 is at risk of failure, the insulation plate 310 can be removed from the insulation component 200 for replacement, which helps to improve the service life of the battery.

[0055] like Figure 3 In some embodiments, the orthographic projection of the connecting portion 311 on the surface of the insulation plate 310 is a closed ring, and an annular sealing groove 312 extending along the connecting portion 311 is provided at the end of the connecting portion 311 facing the insulation component 200, and an elastic sealing member 222 matching the sealing groove 312 is connected to the bottom of the connecting groove 221; when the insulation plate 310 is connected to the insulation component 200, the elastic sealing member 222 abuts against the bottom of the sealing groove 312.

[0056] For example, the elastic sealing member 222 may be a rubber sealing ring.

[0057] For example, the elastic sealing member 222 may be connected to the bottom of the connecting groove 221 by bonding, plugging, or snapping.

[0058] Illustratively, the orthographic projection of the connecting portion 311 on the surface of the insulation plate 310 is in the shape of a circular ring or a polygonal ring.

[0059] During the connection process between the insulation board 310 and the insulation assembly 200, the elastic seal 222 gradually penetrates into the sealing groove 312. As the insulation board 310 and the insulation assembly 200 gradually approach each other, the bottom of the sealing groove 312 gradually presses the elastic seal 222, causing the elastic seal 222 to deform and achieve a sealing effect.

[0060] When the insulation board 310 is connected to the insulation assembly 200 , a sealed space can be formed between the insulation board 310 and the insulation assembly 200 and in the area surrounded by the elastic seal 222 , thereby further preventing the heat inside the insulation assembly 200 from being lost to the outside.

[0061] like Figure 3 In some embodiments, a heating chamber 314 is provided inside the connecting portion 311 , an electric heating component 320 is installed in the heating chamber 314 , and the electric heating component 320 is electrically connected to the battery body 100 .

[0062] For example, the electric heating component 320 may be electrically connected to the shell of the battery body 100 and the metal cap 230 of the heat preservation component 200 , respectively, so that the battery body 100 provides electrical energy to the electric heating component 320 .

[0063] For example, the electric heating component 320 may also be electrically connected to an external circuit other than the battery body 100 , so as to provide electrical energy to the heat transfer wire through the external circuit.

[0064] For example, the electric heating component 320 may also be electrically connected to a control circuit, and the control circuit is used to control the start and stop of the electric heating component 320 so that the battery can be flexibly used in environments with different temperatures.

[0065] For example, Figure 4 , Figure 4 The electric heating component 320 is arranged in a ring shape.

[0066] The electric heating assembly 320 can convert the electric energy provided by the battery body 100 into heat energy, and the heat energy can heat the end of the battery body 100 to further ensure that the battery can be normally charged and discharged in a low temperature environment.

[0067] like Figure 3In some embodiments, the electric heating component 320 includes an electric heating wire 321 electrically connected to the battery body 100, and a thermal conductive sheet 322 spirally wound around the electric heating wire 321, and the thermal conductive sheet 322 and the electric heating wire 321 are thermally connected.

[0068] Illustratively, the heat conducting sheet 322 may be fixedly connected to the electric heating wire 321 by welding.

[0069] The heat conducting sheet 322 can increase the heat dissipation area of the electric heating wire 321, which helps to improve the heating efficiency of the electric heating wire 321. Even if the battery is in a low temperature environment, the electric heating assembly 320 can quickly raise the temperature of the end of the battery body 100 to a temperature that meets the normal charging and discharging requirements of the battery.

[0070] like Figure 3 In some embodiments, at least one side wall of the sealing groove 312 is provided with an accommodating space 313 for accommodating part of the elastic sealing member 222 .

[0071] When the bottom of the sealing groove 312 presses the elastic sealing member 222 , the circumferential sidewall of the elastic sealing member 222 will convexly deform. The accommodating space 313 is used to accommodate the convexly deformed portion of the elastic sealing member 222 .

[0072] Because the deformed portion of the elastic seal 222 can enter the accommodation space 313, the elastic seal 222 can perform its sealing function without being restricted by the space. This means that the thickness of the elastic seal 222 can be reduced relatively freely. Consequently, the movement of the insulation plate 310 toward the insulation assembly 200 is unimpeded, allowing the surface of the insulation plate 310 to fit closely with the surface of the insulation assembly 200, effectively conducting the heat generated by the electric heating assembly 320 to the battery body 100.

[0073] like Figure 3 In some embodiments, the groove wall of the sealing groove 312 includes an inclined sub-wall 315 close to the bottom of the sealing groove 312, and the inclined sub-wall 315 is inclined toward the bottom of the sealing groove 312, and an accommodating space 313 is formed between the inclined sub-wall 315 and the bottom of the sealing groove 312.

[0074] After the deformed portion of the elastic seal 222 enters the accommodation space 313, it may first abut against the portion of the inclined sub-wall 315 away from the bottom of the sealing groove 312, thereby improving the sealing between the elastic seal 222 and the sealing groove 312. At the same time, because there is still an empty accommodation space 313 between the portion of the inclined sub-wall 315 near the bottom of the sealing groove 312 and the bottom of the sealing groove 312, the deformed portion of the elastic seal 222 can still enter this portion of the accommodation space 313, thereby preventing the deformation of the elastic seal 222 from being restricted by space.

[0075] like Figure 3 In some embodiments, the packaging component 300 includes a first insulation layer 330, and a first mounting groove 316 is provided on the surface of the insulation plate 310 facing the insulation component 200. The first insulation layer 330 is detachably connected to the insulation plate 310 through the first mounting groove 316; when the insulation plate 310 is connected to the insulation component 200, the first insulation layer 330 abuts against the surface of the insulation component 200.

[0076] Illustratively, the first mounting groove 316 is disposed in the area surrounded by the connecting portion 311 to dispose the first insulation layer 330 in a sealed space, which helps to improve the insulation effect of the first insulation layer 330 and further prevent the heat inside the insulation component 200 from being lost to the outside.

[0077] Illustratively, the first installation groove 316 is an annular groove provided along the connecting portion 311 to expand the installation area of the first thermal insulation layer 330 and further delay the loss of heat inside the thermal insulation assembly 200 to the outside.

[0078] Exemplarily, the first thermal insulation layer 330 is snapped or embedded in the first installation groove 316 .

[0079] Disposing a first insulation layer 330 between the insulation plate 310 and the insulation assembly 200 further slows heat loss from the ends of the battery body 100. The first mounting slot 316 positions the first insulation layer 330 to prevent it from moving out of its pre-set position during battery assembly and use, which could reduce its insulation effectiveness.

[0080] Since the first thermal insulation layer 330 and the thermal insulation plate 310 are detachably connected, when the first thermal insulation layer 330 is at risk of failure, the first thermal insulation layer 330 can be removed from the thermal insulation plate 310 and replaced, which helps to extend the service life of the battery.

[0081] like Figure 3 In some embodiments, the battery includes a sealing gasket 400, and a second mounting groove 223 is provided on the surface of the insulation component 200 facing the insulation plate 310, and the sealing gasket 400 is connected to the insulation component 200 through the second mounting groove 223; when the insulation plate 310 is connected to the insulation component 200, the sealing gasket 400 abuts against the surface of the insulation plate 310.

[0082] Illustratively, the sealing gasket 400 may be connected to the bottom and / or wall of the second mounting groove 223 by bonding, plugging, or snapping.

[0083] Illustratively, the sealing gasket 400 may be an elastic sealing gasket.

[0084] Illustratively, the sealing gasket 400 may be a sheet-shaped rubber sealing gasket.

[0085] Illustratively, the second mounting groove 223 may be an annular groove surrounding the connecting portion 311 , and accordingly, the sealing gasket 400 may also be an annular gasket to improve the sealing effect of the sealing gasket 400 .

[0086] Illustratively, the second mounting groove 223 may be a ring-shaped groove or at least two ring-shaped grooves arranged in a sleeve, so as to further improve the sealing effect of the sealing gasket 400 .

[0087] On the basis of the elastic sealing member 222 playing a sealing role, the sealing gasket 400 abutting against the insulation board 310 can further improve the sealing between the insulation board 310 and the insulation component 200, and further prevent the heat inside the insulation component 200 from being lost to the outside.

[0088] like Figure 3 In some embodiments, the orthographic projection of the connection portion 311 on the surface of the insulation board 310 is annular, and the connection portion 311 is threadedly connected to the insulation assembly 200 through the connection groove 221 .

[0089] Illustratively, the outer side wall of the connecting portion 311 and the groove wall of the adjacent connecting groove 221 are respectively provided with mutually matching threads.

[0090] Exemplarily, the outer wall of the connecting portion 311 away from the inclined sub-wall 315 is provided with a thread to avoid structural conflict between the thread and the inclined sub-wall 315 .

[0091] Exemplarily, a plurality of protrusions or depressions are provided on a side of the insulation plate 310 away from the heat preservation assembly 200 , and the insulation plate 310 can be driven to rotate by hand or a special tool through the protrusions or depressions.

[0092] For example, a plurality of protrusions or depressions may be evenly arranged around the center of the thermal insulation plate 310 to facilitate driving the thermal insulation plate 310 to rotate.

[0093] The connection portion 311 of the insulation plate 310 is threadedly connected to the insulation assembly 200. Rotating the insulation plate 310 connects and disconnects the insulation plate 310 and the insulation assembly 200. This simplifies battery assembly, improves assembly efficiency, and facilitates mass production. It also enhances the connection reliability between the insulation plate 310 and the insulation assembly 200, further preventing the insulation plate 310 from falling off the insulation assembly 200.

[0094] It should be noted that the above description only describes some embodiments of the present application. Other embodiments are within the scope of the appended claims.

[0095] The various embodiments in this application are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0096] The description of this application is provided for purposes of illustration and description and is not intended to be exhaustive or to limit the application to the disclosed form. Many modifications and variations will be apparent to those skilled in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the application and to enable those skilled in the art to understand the application and design various embodiments with various modifications suitable for specific applications.

[0097] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present application (including the claims) is limited to these examples. Within the scope of the present application, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of simplicity.

[0098] While the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications and variations of these embodiments will be apparent to those skilled in the art in light of the foregoing description.

[0099] The embodiments of the present application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the embodiments of the present application should be included in the scope of protection of this application.

Claims

1. A battery, characterized in that: include: Battery body; A heat-insulating component, covering the outer side of the circumferential side wall and the outer side of the end of the battery body; The packaging assembly is arranged on a side of the thermal insulation assembly away from the battery body. The packaging assembly includes a thermal insulation plate connected to the thermal insulation assembly, and the orthographic projection of the thermal insulation plate on the surface of the battery body at least overlaps with the end portion of the battery body.

2. The battery according to claim 1, characterized in that The insulation board is provided with a protruding connection portion on the board surface facing the insulation component, and the insulation component is provided with a connection groove matching the connection portion on the surface facing the insulation board. The connection portion is detachably connected to the insulation component through the connection groove.

3. The battery according to claim 2, characterized in that The connecting portion has a closed ring shape as its orthographic projection on the surface of the insulation board, and an annular sealing groove extending along the connecting portion is provided at the end of the connecting portion facing the insulation component, and an elastic sealing member matching the sealing groove is connected to the bottom of the connecting groove; when the insulation board is connected to the insulation component, the elastic sealing member abuts against the bottom of the sealing groove.

4. The battery according to claim 3, characterized in that At least one side wall of the sealing groove is provided with an accommodating space for accommodating a portion of the elastic sealing member.

5. The battery according to claim 4, characterized in that The groove wall of the sealing groove includes an inclined sub-wall close to the groove bottom of the sealing groove, the inclined sub-wall is inclined toward the groove bottom of the sealing groove, and the accommodating space is formed between the inclined sub-wall and the groove bottom of the sealing groove.

6. The battery according to claim 2, characterized in that A heating cavity is provided inside the connecting portion, an electric heating component is installed in the heating cavity, and the electric heating component is electrically connected to the battery body.

7. The battery according to claim 6, characterized in that The electric heating assembly includes an electric heating wire electrically connected to the battery body, and a heat conducting sheet spirally wound around the electric heating wire, wherein the heat conducting sheet is thermally connected to the electric heating wire.

8. The battery according to claim 2, characterized in that The orthographic projection of the connecting portion on the surface of the insulation board is in the shape of a circular ring, and the connecting portion is threadedly connected to the insulation component through the connecting groove.

9. The battery according to claim 1, characterized in that The packaging component includes a first thermal insulation layer, and a first mounting groove is provided on the surface of the thermal insulation board facing the thermal insulation component. The first thermal insulation layer is detachably connected to the thermal insulation board through the first mounting groove; when the thermal insulation board is connected to the thermal insulation component, the first thermal insulation layer abuts against the surface of the thermal insulation component.

10. The battery according to claim 1, characterized in that The battery includes a sealing gasket, and a second mounting groove is provided on the surface of the thermal insulation component facing the thermal insulation plate. The sealing gasket is connected to the thermal insulation component through the second mounting groove; when the thermal insulation plate is connected to the thermal insulation component, the sealing gasket abuts against the surface of the thermal insulation plate.

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