Battery and electric device

Abstract

The utility model relates to a battery and an electric device. The battery comprises a box body with an accommodating cavity; the battery assembly is arranged in the containing cavity and comprises at least one row of battery cells and buffer pieces clamped between every two adjacent battery cells in each row, the bottom surfaces of all the battery cells in all the rows and the bottom wall of the containing cavity jointly define a first glue pouring space, and at least one buffer piece is inwards shrunk relative to the bottom surfaces and / or side surfaces of the two battery cells clamping the buffer piece; a second glue filling space communicated with the first glue filling space is defined by the first glue filling space and the two battery cells clamping the first glue filling space; and the first glue filling space and all the second glue filling spaces are filled with the heat-conducting glue. According to the battery and the electric device provided by the invention, the bonding strength can be improved.

Description

Technical Field

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

[0002] As the core component of energy storage and conversion, batteries have been widely used in new energy vehicles, energy storage power stations and other fields. The battery includes a box and a battery cell arranged in the box. At present, the market usually adopts the method of applying glue on the bottom surface of the battery cell to fix the battery cell and the box. This fixing method easily leads to insufficient bonding strength between the battery cell and the box, and it is easy to cause bonding failure during vibration. Utility Model Content

[0003] Based on this, it is necessary to provide a battery and an electrical device that can improve the bonding strength to address the above problems.

[0004] A battery, comprising:

[0005] A box body having a containing cavity;

[0006] A battery assembly is disposed in the accommodating cavity and includes at least one row of battery cells and a buffer member sandwiched between each row and between each two adjacent battery cells, wherein the bottom surfaces of all the battery cells in all rows and the bottom wall of the accommodating cavity jointly define a first glue pouring space, and at least one of the buffer members is retracted relative to the bottom surfaces and / or side surfaces of the two battery cells sandwiching it, and defines with the two battery cells sandwiching it a second glue pouring space communicating with the first glue pouring space; and

[0007] The thermally conductive colloid is filled in the first glue potting space and all the second glue potting spaces.

[0008] In some embodiments, each of the buffer components is retracted relative to the bottom surface and / or side surface of the two battery cells sandwiching the buffer component, and defines the second glue-filling space with the two battery cells sandwiching the buffer component.

[0009] In some embodiments, the battery cell has a first side surface and a second side surface, the first side surface is arranged along the thickness direction of the battery cell, and the second side surface is arranged along the width direction of the battery cell, the first side surfaces of each row and each two adjacent battery cells clamp the buffer, and at least one of the buffer components is retracted relative to the bottom surfaces and / or the second side surfaces of the two battery cells clamping it.

[0010] In some embodiments, at least one of the buffer components is retracted relative to the bottom surfaces of the two battery cells sandwiching the buffer component.

[0011] In some embodiments, the buffer is retracted by a distance L relative to the bottom surfaces of the two battery cells sandwiching it, 0 mm<L≤50 mm.

[0012] In some of the embodiments, a glue limiting component is further included, and the glue limiting component is arranged between the bottom surface of all the battery cells in all rows and the bottom wall of the accommodating cavity to separate the bottom surface of all the battery cells in all rows from the bottom wall of the accommodating cavity and form the first glue filling space.

[0013] In some embodiments, the battery assembly includes a plurality of rows of the battery cells arranged along the width direction of the battery cells, and all the battery cells in each row of the battery cells are arranged along the thickness direction of the battery cells;

[0014] The glue limiting assembly includes a plurality of glue limiting strips, each of which extends along the thickness direction of the battery cell, and all of the glue limiting strips are arranged at intervals along the width direction of the battery cell, and the bottom surface of each row of the battery cells is in contact with at least one of the glue limiting strips.

[0015] In some embodiments, the battery assembly includes multiple rows of battery cells arranged along the thickness direction or width direction of the battery cells, and a third glue potting space connected to the first glue potting space is defined between each two adjacent rows of battery cells, and the thermal conductive glue is filled in all the third glue potting spaces.

[0016] In some embodiments, the battery assembly includes a plurality of rows of the battery cells arranged along the width direction of the battery cells, and all the battery cells in each row of the battery cells are arranged along the thickness direction of the battery cells;

[0017] The box body is structured to form a first crossbeam and a second crossbeam, which are arranged at intervals on two opposite sides of the battery assembly along the thickness direction or the width direction of the battery cell and are used to limit the battery assembly.

[0018] An electrical device comprises a battery as described in any one of the embodiments, wherein the battery is used to provide electrical energy.

[0019] The battery and the electrical device are designed such that the bottom surfaces of all the cells in all the rows and the bottom wall of the accommodating cavity jointly define a first glue-filling space, at least one buffer is retracted relative to the bottom surfaces and / or sides of the two cells sandwiching it, and defines a second glue-filling space connected to the first glue-filling space with the two cells sandwiching it, and the thermal conductive colloid is filled in the first glue-filling space and all the second glue-filling spaces, so that the thermal conductive colloid can contact the bottom surface and side surface of the cell at the same time, and the contact area between the thermal conductive colloid and the cell is increased. In this way, it is beneficial to improve the reliability of the bonding between the cell and the box body, and greatly reduce the risk of bonding failure during vibration. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 An exploded diagram of a battery in one embodiment of the present application;

[0021] Figure 2 for Figure 1 A schematic diagram of the structure of the battery assembly, the thermal conductive colloid and the adhesive limiting assembly after the conductive colloid in the battery is solidified;

[0022] Figure 3 for Figure 2 The cross-sectional view of the battery shown along the AA direction;

[0023] Figure 4 for Figure 3 An enlarged schematic diagram of a local structure B of the battery shown;

[0024] Figure 5 It is a structural schematic diagram of a buffer member retracting relative to the bottom surface of the battery cell in which the buffer member is sandwiched in one embodiment of the present application;

[0025] Figure 6 It is a structural schematic diagram of a buffer member in an embodiment of the present application, in which the bottom and side surfaces of the battery cell on which the buffer member is sandwiched are retracted;

[0026] Figure 7 It is a schematic structural diagram of a buffer member retracting relative to the side surface of the battery cell on which the buffer member is sandwiched in one embodiment of the present application;

[0027] Figure 8 This is a schematic structural diagram of the thermal conductive colloid after curing and cooperating with the adhesive limiting component in one embodiment of the present application.

[0028] Figure Number:

[0029] 1.Battery;

[0030] 10. Box; 20. Battery assembly; 30. Thermal conductive colloid; 40. Glue-limiting assembly;

[0031] 11. Accommodating cavity; 12. First glue pouring space; 13. First crossbeam; 14. First part; 15. Second part;

[0032] 21. battery cell; 211. first side surface; 212. second side surface; 22. buffer; 23. second glue pouring space; 24. third glue pouring space; 25. tightening belt;

[0033] 31. first heat conducting part; 32. second heat conducting part; 33. third heat conducting part;

[0034] 41. Limited rubber strips;

[0035] X, width direction; Y, thickness direction; Z, height direction. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0037] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0040] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0042] See also Figure 1 The battery 1 is used as a power source to provide electric energy to the electric device. The electric device may be, but is not limited to, a mobile phone, a tablet, a laptop, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. The electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc. The spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0043] The battery 1 includes a case 10, a battery assembly 20 and a thermally conductive colloid 30. The case 10 has a receiving cavity 11. The battery assembly 20 and the thermally conductive colloid 30 are both arranged in the receiving cavity 11. The battery assembly 20 is used to provide electrical energy, and the thermally conductive colloid 30 is used to conduct heat between the battery assembly 20 and the case 10 so that the battery assembly 20 can be maintained at a normal operating temperature.

[0044] The box 10 includes a first part 14 and a second part 15, which cover each other, and the first part 14 and the second part 15 jointly define a housing cavity 11 for accommodating the battery assembly 20 and the thermally conductive colloid 30. The first part 14 can be a plate-like structure, and the second part 15 can be a hollow structure with one end open. The first part 14 covers the open side of the second part 15, so that the first part 14 and the second part 15 jointly define the housing cavity 11; the first part 14 and the second part 15 can also be both hollow structures with one side open, and the open side of the first part 14 covers the open side of the second part 15. Of course, the box 10 formed by the first part 14 and the second part 15 can be in a variety of shapes, such as a cylinder, a cuboid, etc.

[0045] Please refer again Figure 1 , and also see Figures 2 to 7The battery assembly 20 includes at least one row of battery cells 21 and a buffer 22 clamped between each row and between every two adjacent battery cells 21. The bottom surfaces of all battery cells 21 in all rows and the bottom wall of the accommodating cavity 11 jointly define a first glue pouring space 12. At least one buffer 22 is retracted relative to the bottom surfaces and / or side surfaces of the two battery cells 21 sandwiching it, and defines a second glue pouring space 23 connected to the first glue pouring space 12 with the two battery cells 21 sandwiching it.

[0046] The battery cell 21 is an energy supply component of the battery assembly 20 . The battery cell 21 may be a secondary battery or a primary battery, or may be a lithium-sulfur battery, a sodium-ion battery or a magnesium-ion battery, but is not limited thereto.

[0047] As an example, the battery cells 21 in the battery assembly 20 may be arranged in one row or multiple rows, and each row of battery cells 21 is bound by a tightening band 25 so that each row of battery cells 21 forms a whole. The more rows of battery cells 21 there are, the higher the energy density of the battery cells 21 will generally be.

[0048] For example, multiple rows of battery cells 21 are arranged along the width direction X of the battery cells 21, and all the battery cells 21 in each row of battery cells 21 are arranged along the thickness direction Y of the battery cells 21; or, multiple rows of battery cells 21 may be arranged along the thickness direction Y of the battery cells 21, and all the battery cells 21 in each row of battery cells 21 are arranged along the width direction X of the battery cells 21. The specific arrangement method can be set according to needs and is not limited here.

[0049] Among them, the battery cell 21 has a height direction Z, a width direction X and a thickness direction Y. The height direction Z of the battery cell 21 refers to the direction in which the pole of the battery cell 21 protrudes. The width direction X and the thickness direction Y of the battery cell 21 are both perpendicular to the height direction Z. The width direction X of the battery cell 21 is the direction in which the battery cell 21 has a larger size, and the thickness direction Y of the battery cell 21 is the direction in which the battery cell 21 has a smallest size.

[0050] The bottom surfaces of all the battery cells 21 in all the rows and the bottom wall of the accommodating cavity 11 together define a first glue filling space 12. It can be understood that the bottom surfaces of all the battery cells 21 in the battery assembly 20 are combined to form the bottom surface of the battery assembly 20, and the bottom surface of the battery assembly 20 and the bottom wall of the accommodating cavity 11 together define the first glue filling space 12.

[0051] The buffer 22 is used to absorb the increased volume of the two battery cells 21 sandwiched therebetween due to expansion, so as to reduce the risk of deformation due to mutual compression between two adjacent battery cells 21 in the same row caused by expansion.

[0052] As an example, the buffer member 22 may be made of pearl cotton, sponge or other buffer materials with a certain elasticity.

[0053] At least one buffer 22 is retracted relative to the bottom surface and / or side surface of the two battery cells 21 sandwiched therebetween. It can be understood that at least one buffer 22 is retracted relative to the bottom surface of the two battery cells 21 sandwiched therebetween, or at least one buffer 22 is retracted relative to the side surface of the two battery cells 21 sandwiched therebetween, or at least one buffer 22 is retracted relative to both the bottom surface and side surface of the two battery cells 21 sandwiched therebetween, that is, at least one buffer 22 is retracted relative to the bottom surface and side surface of each battery cell 21 sandwiched therebetween.

[0054] At least one buffer 22 retracts inwardly, which can be understood as one buffer 22 retracts inwardly, or a plurality of but not all buffers 22 retracts inwardly, or all buffers 22 retract inwardly.

[0055] Please refer again Figure 1 , Figure 3 and Figure 4 The thermally conductive colloid 30 is filled in the first glue filling space 12 and all the second glue filling spaces 23, and is in contact with all the battery cells 21 and the bottom plate of the box 10. The bottom plate of the box 10 is a heat exchange plate. When the temperature of the battery cell 21 is too high, the battery cell 21 can transfer heat to the bottom plate of the box 10 through the thermally conductive colloid 30 to achieve cooling of the battery cell 21. When the temperature of the battery cell 21 is too low, the bottom plate of the box 10 can transfer heat to the battery cell 21 through the thermally conductive colloid 30 to achieve heating of the battery cell 21, so that the battery cell 21 can be maintained at a temperature that allows normal operation.

[0056] In the actual operation, a layer of fluid thermally conductive colloid 30 is brushed on the bottom wall of the accommodating cavity 11 in advance, and then multiple rows of battery cells 21 are sequentially placed in the accommodating cavity 11, and then all rows of battery cells 21 are pressed down at the same time, so that the thermally conductive colloid 30 can be flattened in the first glue pouring space 12. At the same time, the thermally conductive colloid 30 squeezed out of the first glue pouring space 12 enters each second glue pouring space 23 and fills each second glue pouring space 23. Afterwards, the thermally conductive colloid 30 is cured and the battery cells 21 are bonded to the box body 10. This method is simple and convenient to operate.

[0057] Of course, the glue pouring method is not limited to the above one. In some other practical operation processes, the first glue pouring space 12 and the second glue pouring space 23 may be formed first, and then the thermal conductive glue 30 may be poured into the first glue pouring space 12 and the second glue pouring space 23 .

[0058] In the related art, the battery cell 21 and the box body 10 are usually fixed by applying glue on the bottom surface of the battery cell 21. This fixing method easily leads to insufficient bonding strength between the battery cell 21 and the box body 10, and bonding failure easily occurs during vibration. In the present application, the bottom surface of all the battery cells 21 in all rows is designed to jointly define a first glue filling space 12 with the bottom wall of the accommodating cavity 11, at least one buffer 22 is retracted relative to the bottom surface and / or side surface of the two battery cells 21 sandwiched therebetween, and defines a second glue filling space 23 connected to the first glue filling space 12 with the two battery cells 21 sandwiched therebetween, and the thermal conductive colloid 30 is filled in the first glue filling space 12 and all the second glue filling spaces 23, so that the thermal conductive colloid 30 can contact the bottom surface and side surface of the battery cell 21 at the same time, and the contact area between the thermal conductive colloid 30 and the battery cell 21 is increased. In this way, on the one hand, it is helpful to improve the reliability of the adhesion between the battery cell 21 and the box body 10, greatly reducing the risk of adhesion failure during vibration. On the other hand, it can improve the thermal conductivity between the battery cell 21 and the bottom plate of the box body 10 to reduce the risk of thermal runaway or low-temperature failure of the battery 1, and ultimately achieve the purpose of optimizing the performance of the battery 1.

[0059] Please refer again Figures 3 to 7 In some optional embodiments, each buffer 22 is retracted relative to the bottom and / or side surfaces of the two battery cells 21 sandwiching it, and defines a second glue pouring space 23 with the two battery cells 21 sandwiching it. In this embodiment, a second glue pouring space 23 can be formed between each row and each two adjacent battery cells 21. This design greatly increases the contact area between the thermal conductive colloid 30 and the battery cell 21, making the bonding between the battery cell 21 and the box 10 more reliable, and the thermal conductivity efficiency is also improved.

[0060] Please refer again Figures 1 to 7 In some optional embodiments, the battery cell 21 has a first side surface 211 and a second side surface 212, the first side surface 211 is arranged along the thickness direction Y of the battery cell 21, and the second side surface 212 is arranged along the width direction X of the battery cell 21, and the first side surfaces 211 of each row and each two adjacent battery cells 21 clamp the buffer 22, and at least one buffer 22 is retracted relative to the bottom surface and / or the second side surface 212 of the two battery cells 21 clamping it.

[0061] The first side surface 211 of the battery cell 21 is commonly referred to as a large side of the battery cell 21 , and the second side surface 212 of the battery cell 21 is commonly referred to as a small side of the battery cell 21 .

[0062] The first side surfaces 211 of each row and each two adjacent battery cells 21 clamp the buffer 22, and when the buffer 22 shrinks, the second glue pouring space 23 formed has a larger volume. Therefore, when the thermal conductive colloid 30 is poured into the second glue pouring space 23, the contact area between the thermal conductive colloid 30 and the battery cell 21 is also larger, the thermal conductive colloid 30 has a good thermal conductivity, and the battery cell 21 and the box body 10 are bonded with good reliability.

[0063] Please refer again Figures 2 to 5 In some optional embodiments, at least one buffer 22 is retracted relative to the bottom surfaces of the two battery cells 21 sandwiching it. When the thermal conductive colloid 30 is poured into the second glue pouring space 23, the thermal conductive colloid 30 extends from bottom to top until it contacts the bottom surface of the buffer 22. In this design, the thermal conductive colloid 30 is poured into the second glue pouring space 23 and adheres to the lower end of the battery cell 21, which is conducive to improving the stability and reliability of the bonding.

[0064] Further, in some optional embodiments, the distance that the buffer 22 is retracted relative to the bottom surface of the battery cell 21 sandwiching it is L, and 0 mm < L ≤ 50 mm. It can be understood that the distance that the buffer 22 is retracted is L, and the height dimension of the second glue pouring space 23 is also L, and at the same time, the height dimension of the thermal conductive colloid 30 poured into the second glue pouring space 23 is also L. 0 mm < L ≤ 50 mm, within this size range, on the one hand, the thermal conductive colloid 30 and the battery cell 21 have a relatively suitable contact height, the thermal conductive colloid 30 has high thermal conductivity, and the battery cell 21 is firmly bonded to the box 10, and on the other hand, the buffer 22 still has a suitable height for absorbing the expansion of the battery cell 21.

[0065] Please refer again Figure 1 , Figure 3 , Figure 4 and Figure 8 In some optional embodiments, the battery 1 further includes a glue limiting component 40, which is disposed between the bottom surface of all the battery cells 21 in all the rows and the bottom wall of the accommodating cavity 11 to separate the bottom surface of all the battery cells 21 in all the rows from the bottom wall of the accommodating cavity 11 and form a first glue filling space 12.

[0066] During actual assembly, the battery assembly 20 is pressed down until the bottom surfaces of all the battery cells 21 abut against the adhesive limiting assembly 40 and are forced to stop moving. The setting of the adhesive limiting assembly 40 can, on the one hand, realize the positioning of the battery assembly 20 when it is pressed down, and on the other hand, form a first adhesive filling space 12 between the bottom surfaces of all the battery cells 21 in all rows and the bottom wall of the accommodating cavity 11, so that the thermal conductive adhesive 30 can always be filled in the first adhesive filling space 12, and the battery cells 21 and the box body 10 are bonded.

[0067] In some optional embodiments, the battery assembly 20 includes multiple rows of battery cells 21 arranged along the width direction X of the battery cells 21, and all the battery cells 21 in each row of battery cells 21 are arranged along the thickness direction Y of the battery cells 21; the glue limiting assembly 40 includes multiple glue limiting strips 41, each glue limiting strip 41 extends along the thickness direction Y of the battery cell 21, and all the glue limiting strips 41 are arranged at intervals along the width direction X of the battery cell 21, and the bottom surface of each row of battery cells 21 is in contact with at least one glue limiting strip 41.

[0068] Specifically, each rubber limiting strip 41 extends along the thickness direction Y of the battery cell 21 and contacts the bottom surfaces of all the battery cells 21 in a row of battery cells 21 in contact with it. The bottom surfaces of all the battery cells 21 in the same row of battery cells 21 can contact one or more rubber limiting strips 41 at the same time, and the bottom surfaces of the battery cells 21 in different rows of battery cells 21 contact different rubber limiting strips 41.

[0069] It can be understood that when each row of battery cells 21 is pressed down to contact the corresponding limiting glue strip 41 and the thermally conductive glue 30 is filled in the first glue filling space 12, the thickness of the thermally conductive glue 30 in the first glue filling space 12 is the same as the thickness of the limiting glue strip 41, so that the thickness of the thermally conductive glue 30 in the first glue filling space 12 remains uniform, which is beneficial to improve the uniformity of thermal conductivity.

[0070] by Figure 8 Taking the example that the middle battery assembly 20 has three rows of battery cells 21, and each buffer 22 is inwardly contracted relative to the bottom surface of the two battery cells 21 sandwiching it, the cured thermal conductive colloid 30 includes a first thermal conductive portion 31, a second thermal conductive portion 32 and a third thermal conductive portion 33. The first thermal conductive portion 31 is filled in the first glue injection space 12, and all the limiting glue strips 41 are buried in the first thermal conductive portion 31. The first thermal conductive portion 31 conducts heat at the bottom of the battery cell 21. The second thermal conductive portion 32 and the third thermal conductive portion 33 protrude from the side of the first thermal conductive portion 31 facing the battery cell 21. The second thermal conductive portion 32 is formed by curing the thermal conductive colloid 30 that overflows out of the battery assembly 20 and is arranged around the circumference of the battery assembly 20. The second thermal conductive portion 32 conducts heat on the outside of the battery assembly 20. There are multiple third heat conducting parts 33 , each of which corresponds to the second glue potting space 23 . Each third heat conducting part 33 is formed by curing the heat conducting glue 30 filled in the corresponding second glue potting space 23 , and the third part conducts heat between the battery cells 21 .

[0071] See also Figures 2 to 4 In some optional embodiments, the battery assembly 20 includes multiple rows of battery cells 21 arranged along the thickness direction Y or the width direction X of the battery cells 21, and each adjacent row of battery cells 21 can be closely arranged, and the thermal conductive colloid 30 will not squeeze into the space between each adjacent row of battery cells 21 when under pressure. In some optional embodiments, the battery assembly 20 includes multiple rows of battery cells 21 arranged along the thickness direction Y or the width direction X of the battery cells 21, and each adjacent row of battery cells 21 defines a third glue potting space 24 connected to the first glue potting space 12, and the thermal conductive colloid 30 is filled in all the third glue potting spaces 24.

[0072] It is worth mentioning that when the buffer 22 is retracted relative to the bottom surfaces of the two battery cells 21 sandwiching it, the third glue filling space 24 is also connected to the adjacent second glue filling space 23 .

[0073] In actual operation, multiple rows of battery cells 21 are sequentially placed into the accommodating cavity 11 and pressed down at the same time, and the thermal conductive glue 30 squeezed out of the first glue filling space 12 enters each third glue filling space 24 and fills each third glue filling space 24 .

[0074] By designing the third glue pouring space 24, the thermal conductive colloid 30 is filled in the third glue pouring space 24, so that the contact area between the thermal conductive colloid 30 and the battery cell 21 is increased. In this way, on the one hand, it is helpful to improve the reliability of the bonding between the battery cell 21 and the box body 10, and greatly reduce the risk of bonding failure during vibration. On the other hand, it can improve the heat conduction efficiency between the battery cell 21 and the bottom plate of the box body 10, so as to reduce the risk of thermal runaway or low temperature failure of the battery 1.

[0075] In some optional embodiments, the battery assembly 20 includes multiple rows of battery cells 21 arranged along the width direction X of the battery cells 21, and all the battery cells 21 in each row of battery cells 21 are arranged along the thickness direction Y of the battery cells 21; the box body 10 is structured with a first crossbeam 13 and a second crossbeam, which are arranged at intervals on opposite sides of the battery assembly 20 along the thickness direction Y or the width direction X of the battery cells 21, and are used to limit the battery assembly 20. The first crossbeam 13 and the second crossbeam can reduce the risk of the battery assembly 20 being offset relative to the box body 10 in a plane parallel to the bottom wall of the accommodating cavity 11 when pressed down, thereby facilitating the installation accuracy of the battery assembly 20 and ensuring that the first glue filling space 12 and all the second glue filling spaces 23 can be filled with the thermal conductive glue 30.

[0076] The battery 1 and the electrical device are designed such that the bottom surfaces of all the cells 21 in all rows and the bottom wall of the accommodating cavity 11 jointly define a first glue-filling space 12, at least one buffer 22 is retracted relative to the bottom surfaces and / or sides of the two cells 21 sandwiched therebetween, and defines a second glue-filling space 23 connected to the first glue-filling space 12 with the two cells 21 sandwiched therebetween, and the thermally conductive colloid 30 is filled in the first glue-filling space 12 and all the second glue-filling spaces 23, so that the thermally conductive colloid 30 can contact the bottom surface and the side surface of the cell 21 at the same time, and the contact area between the thermally conductive colloid 30 and the cell 21 is increased. In this way, on the one hand, it is conducive to improving the reliability of the bonding between the cell 21 and the box 10, greatly reducing the risk of bonding failure during vibration, and on the other hand, it can improve the thermal conductivity between the cell 21 and the bottom plate of the box 10, so as to reduce the risk of thermal runaway or low-temperature failure of the battery 1, and finally achieve the purpose of optimizing the performance of the battery 1.

[0077] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0078] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A battery, characterized in that: The battery comprises: A box body (10) having a receiving chamber (11); A battery assembly (20) is arranged in the accommodating cavity (11) and comprises at least one row of battery cells (21) and a buffer (22) sandwiched between each row and between two adjacent battery cells (21), wherein the bottom surfaces of all the battery cells (21) in all rows and the bottom wall of the accommodating cavity (11) jointly define a first glue-filling space (12), and at least one of the buffers (22) is retracted relative to the bottom surfaces and / or side surfaces of the two battery cells (21) sandwiched therebetween, and defines a second glue-filling space (23) communicating with the first glue-filling space (12) with the two battery cells (21) sandwiched therebetween; and The thermally conductive glue (30) is filled in the first glue pouring space (12) and all the second glue pouring spaces (23).

2. The battery according to claim 1, characterized in that Each of the buffer components (22) is retracted relative to the bottom surface and / or side surface of the two battery cells (21) sandwiching it, and defines the second glue-filling space (23) with the two battery cells (21) sandwiching it.

3. The battery according to claim 1, characterized in that The battery cell (21) has a first side surface (211) and a second side surface (212); the first side surface (211) is arranged along a thickness direction (Y) of the battery cell (21); the second side surface (212) is arranged along a width direction (X) of the battery cell (21); the first side surfaces (211) of each row and each of two adjacent battery cells (21) clamp the buffer (22); and at least one buffer (22) is retracted relative to the bottom surfaces of the two battery cells (21) clamping it and / or the second side surfaces (212).

4. The battery according to any one of claims 1 to 3, characterized in that: At least one of the buffer components (22) is retracted relative to the bottom surfaces of the two battery cells (21) sandwiching it.

5. The battery according to claim 4, characterized in that The buffer (22) is retracted by a distance L relative to the bottom surfaces of the two battery cells (21) sandwiching it, 0 mm < L ≤ 50 mm.

6. The battery according to any one of claims 1 to 3, characterized in that: It also includes a glue limiting component (40), which is arranged between the bottom surfaces of all the battery cells (21) in all rows and the bottom wall of the accommodating cavity (11) to separate the bottom surfaces of all the battery cells (21) in all rows from the bottom wall of the accommodating cavity (11) and form the first glue filling space (12).

7. The battery according to claim 6, characterized in that The battery assembly (20) comprises a plurality of rows of battery cells (21) arranged along a width direction (X) of the battery cells (21), and all the battery cells (21) in each row of the battery cells (21) are arranged along a thickness direction (Y) of the battery cells (21); The glue limiting component (40) comprises a plurality of glue limiting strips (41), each of the glue limiting strips (41) extending along a thickness direction (Y) of the battery cell (21), and all of the glue limiting strips (41) are arranged at intervals along a width direction (X) of the battery cell (21), and the bottom surface of each row of the battery cells (21) is in contact with at least one of the glue limiting strips (41).

8. The battery according to any one of claims 1 to 3, characterized in that: The battery assembly (20) comprises a plurality of rows of battery cells (21) arranged along a thickness direction (Y) or a width direction (X) of the battery cells (21), a third glue potting space (24) communicating with the first glue potting space (12) is defined between each two adjacent rows of battery cells (21), and the thermal conductive colloid (30) is filled in all the third glue potting spaces (24).

9. The battery according to any one of claims 1 to 3, characterized in that: The battery assembly (20) comprises a plurality of rows of battery cells (21) arranged along a width direction (X) of the battery cells (21), and all the battery cells (21) in each row of the battery cells (21) are arranged along a thickness direction (Y) of the battery cells (21); The box body (10) is structured to have a first crossbeam (13) and a second crossbeam, the first crossbeam (13) and the second crossbeam are arranged at intervals on opposite sides of the battery assembly (20) along the thickness direction (Y) or the width direction (X) of the battery cell (21), and are used to limit the position of the battery assembly (20).

10. An electrical device, characterized in that: A battery as claimed in claim 9, wherein the battery is used to provide electrical energy.

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