Battery

Abstract

The utility model provides a battery. The battery comprises an outer box provided with an accommodating cavity; the battery module is provided with a first end and a second end which are opposite; the first end is sleeved with the first fixing sleeve, and the second end is sleeved with the second fixing sleeve; wherein the first fixing sleeve, the second fixing sleeve and the battery module are matched together and limited in the accommodating cavity. The battery provided by the utility model is more uniform in glue filling, and other parts are convenient to mount.

Description

Technical Field

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

[0002] Batteries are widely used in various industries due to their advantages such as high energy density, high operating voltage, no memory and long cycle life.

[0003] The battery includes a battery cell. In the related art, after the battery module is installed in the outer box of the battery, glue needs to be poured into the outer box to fix the battery module. However, during the glue pouring process, since the battery module is not fixed, the battery module is easily affected by the flowing colloid and shifted, resulting in uneven glue pouring. In addition, the shifted battery module will also affect the subsequent assembly of other components in the battery. Utility Model Content

[0004] Based on this, it is necessary to provide a battery to address the above problems.

[0005] A battery, comprising:

[0006] The outer box is provided with a receiving cavity;

[0007] A battery module having a first end and a second end opposite to each other; and

[0008] A first fixing sleeve and a second fixing sleeve, wherein the first fixing sleeve is disposed outside the first end, and the second fixing sleeve is disposed outside the second end;

[0009] The first fixing sleeve, the second fixing sleeve and the battery module cooperate with each other and are confined in the accommodating cavity.

[0010] In some embodiments, the end surface of the first fixing sleeve away from the battery module and the end surface of the second fixing sleeve away from the battery module are both provided with limiting ribs protruding in a direction away from the battery module; and / or

[0011] The two side surfaces of the first fixing sleeve opposite to and away from the battery module are both provided with limiting convex ribs protruding in a direction away from the battery module; and / or

[0012] The two side surfaces of the second fixing sleeve opposite to and away from the battery module are both provided with limiting ribs protruding in a direction away from the battery module.

[0013] In some embodiments, the battery module includes a plurality of battery cells arranged in a stack;

[0014] The battery cell has a first pole end and a second pole end that are arranged opposite to each other, the first pole end of all the battery cells is the first end, and the second pole end of all the battery cells is the second end; or

[0015] The battery cells have a pole end and a non-pole end that are arranged opposite to each other. The pole end of all the battery cells is the first end, and the non-pole end of all the battery cells is the second end.

[0016] In some embodiments, when the battery cell has a first pole end and a second pole end that are arranged opposite to each other, at least one of the first fixing sleeve and the second fixing sleeve is provided with at least one of a pole avoidance hole, a first avoidance hole, a second avoidance hole and an explosion-proof avoidance hole on an end surface away from the battery module;

[0017] When the battery cell has a pole end and a non-pole end that are arranged opposite to each other, the end surface of the first fixing sleeve away from the battery module is provided with at least one of a pole avoidance hole, a first avoidance hole, a second avoidance hole and an explosion-proof avoidance hole;

[0018] The pole avoidance hole is used to avoid the pole of the battery cell, the first avoidance hole is used to avoid the temperature measuring component for detecting the temperature of the battery module, the second avoidance hole is used to avoid the pressure measuring component for detecting the voltage of the battery module, and the explosion-proof avoidance hole is used to avoid the explosion-proof valve of the battery cell.

[0019] In some embodiments, the battery module further comprises a busbar component, a first output electrode and a second output electrode, and the poles of two adjacent battery cells at the same end of the battery module are electrically connected through the busbar component;

[0020] When the battery cell has a first pole end and a second pole end that are relatively arranged, the end surface of the first fixing sleeve away from the battery module and the end surface of the second fixing sleeve away from the battery module are both provided with a first groove, a second groove and a pole avoiding hole, the pole avoiding hole is used to avoid the pole of the battery cell, and the pole avoiding hole is located in the second groove corresponding to the busbar component connected to the pole to be avoided, the first output electrode part is limited to be located in the first groove of the first fixing sleeve and is electrically connected to the positive pole of the first end, the second output electrode part is limited to be located in the first groove of the second fixing sleeve and is electrically connected to the negative pole of the second end, the busbar component corresponds to the second groove one by one, and the busbar component is limited to be located in the corresponding second groove.

[0021] In some embodiments, the battery module further comprises a busbar component, a first output electrode and a second output electrode, and the poles of two adjacent battery cells at the same end of the battery module are electrically connected through the busbar component;

[0022] When the battery cell has a pole end and a non-pole end that are relatively arranged, the first fixing sleeve is provided with two first grooves, a second groove and a pole avoiding hole on the end surface away from the battery module, the pole avoiding hole is used to avoid the pole of the battery cell, and the pole avoiding hole is located in the second groove corresponding to the busbar component connected to the pole to be avoided, the first output electrode portion is limited to be located in one of the first grooves of the first fixing sleeve and is electrically connected to the positive pole of the first end, the second output electrode portion is limited to be located in another first groove of the first fixing sleeve and is electrically connected to the negative pole of the first end, the busbar component corresponds to the second groove one by one, and the busbar component is limited to be located in the corresponding second groove.

[0023] In some embodiments, when the battery cell has a first pole end and a second pole end that are oppositely disposed, two first foam components that are spaced apart are filled between at least one side of the battery cell and the cavity wall of the accommodating cavity, and the two first foam components on each side are located between the first fixing sleeve and the second fixing sleeve, and one of the first foam components abuts against the first fixing sleeve, and the other first foam component abuts against the second fixing sleeve;

[0024] When the battery cell has a pole end and a non-pole end that are arranged opposite to each other, a first foam component is filled between at least one side of the battery cell and the cavity wall of the accommodating cavity, and the first foam component on each side is located between the first fixing sleeve and the second fixing sleeve and abuts against the first fixing sleeve.

[0025] In some embodiments, the battery further includes a second foaming component filled between each two adjacent battery cells; and / or

[0026] The battery further includes a tightening sleeve, which is located between the first fixing sleeve and the second fixing sleeve and is sleeved outside all the battery cells. The tightening sleeve is used to tighten all the battery cells.

[0027] In some embodiments, at least one of the first fixing sleeve and the second fixing sleeve is provided with a glue hole, and in the stacking direction of the battery cells, the height of the glue hole is lower than the total height of all the stacked battery cells.

[0028] In some embodiments, the first fixing sleeve and the second fixing sleeve are spaced apart from each other, and a gap between the first fixing sleeve and the second fixing sleeve forms a space allowing the battery module to expand; and / or

[0029] At least the first fixing sleeve and the second fixing sleeve have corner avoidance holes at their top corners, and the corner avoidance holes are used to avoid corners of the battery module.

[0030] Compared with the prior art, the first fixing sleeve of the battery in the embodiment of the present application is sleeved on the outside of the first end of the battery module, the second fixing sleeve is sleeved on the outside of the second end of the battery module, and the first fixing sleeve, the second fixing sleeve and the battery module can be constrained in the accommodating cavity to achieve the position fixation of the battery module. In this way, in the process of injecting glue from the gap between the battery module and the cavity wall of the accommodating cavity, the possibility of the battery module being affected by the colloid and moving is small, which reduces the risk of position displacement caused by the movement of the battery module, makes the injection more uniform, and also facilitates the subsequent assembly of other components in the battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 Schematic diagram of the structure of a battery in one embodiment of the present application.

[0032] Figure 2 for Figure 1 The schematic diagram of the structure of the battery with the box cover removed is shown.

[0033] Figure 3 for Figure 2 The schematic diagram of the structure of the battery without the box is shown.

[0034] Figure 4 for Figure 3 An exploded view of the battery is shown.

[0035] Figure 5 for Figure 4 An exploded view of the battery module is shown.

[0036] Figure 6 for Figure 4 The structural schematic diagram of the second fixing sleeve is shown.

[0037] Figure Number:

[0038] 1.Battery;

[0039] 10. Outer box; 20. Battery module; 30. First fixing sleeve; 40. Second fixing sleeve; 50. First foaming component; 60. Second foaming component; 70. Tightening sleeve;

[0040] 11. Accommodating chamber; 12. Box body; 13. Box cover;

[0041] 21. Battery cell; 22. Pole end; 23. Non-pole end; 24. Current collector; 25. Pole; 26. Explosion-proof valve; 27. First output electrode; 28. Second output electrode;

[0042] 31. Position-limiting rib; 32. Corner avoidance hole; 33. Pole avoidance hole; 34. First avoidance hole; 35. Second avoidance hole; 36. Explosion-proof avoidance hole; 37. First groove; 38. Second groove; 41. Glue hole;

[0043] X, stacking direction. DETAILED DESCRIPTION

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] At present, from the perspective of market development, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, its market demand is also constantly expanding.

[0049] The battery includes a battery cell. In the related art, after the battery module is installed in the outer box of the battery, glue needs to be poured into the outer box to fix the battery module. However, during the glue pouring process, since the battery module is not fixed, the battery module is easily affected by the flowing colloid and shifted, resulting in uneven glue pouring. In addition, the shifted battery module will also affect the subsequent assembly of other components in the battery.

[0050] Please refer to the figure again Figures 1 to 5 In order to alleviate the problem of uneven glue injection caused by the offset of the battery module 20 and affecting the assembly of other components, the applicant has designed a battery 1 after in-depth research. The battery 1 includes an outer box 10, a battery module 20, a first fixing sleeve 30 and a second fixing sleeve 40. The outer box 10 is provided with a receiving cavity 11. The battery module 20 has a first end and a second end opposite to each other. The first fixing sleeve 30 is sleeved outside the first end, and the second fixing sleeve 40 is sleeved outside the second end. Among them, the first fixing sleeve 30, the second fixing sleeve 40 and the battery module 20 cooperate with each other and are limited in the receiving cavity 11.

[0051] 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 technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0052] Specifically, the outer box 10 includes a box body 12 and a box cover 13, and the box cover 13 and the box body 12 define a receiving chamber 11 for receiving the battery module 20, the first fixing sleeve 30 and the second fixing sleeve 40. The box body 12 is a hollow structure with one end open and the other end closed, and the box cover 13 is a plate-like structure and is detachably covered on the open side of the box body 12 and is used to close the box body 12, so that the internal environment of the box body 12 can be isolated from the external environment where the battery 1 is located. Of course, the box cover 13 can also be a hollow structure with one end open and the other end closed, and the open side of the box cover 13 can be detachably covered on the open side of the box body 12. The box body 12 and the box cover 13 are made of insulating materials. The box body 12 can be rectangular, cylindrical or other shapes, and the shape of the box cover 13 is adapted to the shape of the box body 12. The box cover 13 can be detachably connected to the box body 12 by screws, pins or other detachable parts.

[0053] Specific reference Figure 4 The battery module 20 includes a plurality of battery cells 21 , and the plurality of battery cells 21 are stacked along a thickness direction of one of the battery cells 21 , and the plurality of battery cells 21 may be connected in series or in parallel.

[0054] The first end and the second end of the battery module 20 may be arranged along the thickness direction of the battery cell 21, or may be arranged along the width direction or the length direction of the battery cell 21. The length direction of the battery cell 21 refers to the protruding direction of the pole 25 of the battery cell 21, and the width direction of the battery cell 21 refers to the direction perpendicular to the length direction and the thickness direction of the battery cell 21. 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 the orientation or position relationship based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present application.

[0055] The battery module 20 further includes a busbar 24, a first output electrode 27 and a second output electrode 28. The poles 25 of two adjacent battery cells 21 at the same end of the battery module 20 are electrically connected through the busbar 24, so that all battery cells 21 can be connected in series or in parallel to form a whole, that is, the battery module 20. The first output electrode 27 is electrically connected to the positive electrode of the battery module 20, and the second output electrode 28 is electrically connected to the negative electrode of the battery module 20, so as to realize the input and output of the current of the battery module 20.

[0056] Each battery cell 21 may be a secondary battery or a primary battery, or a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery, but is not limited thereto. The battery cell 21 may be cylindrical, flat, rectangular, or in other shapes.

[0057] The first fixing sleeve 30 and the second fixing sleeve 40 are both made of insulating materials, such as plastic, rubber or other polymer materials, etc., which are not specifically limited here.

[0058] The first fixing sleeve 30 and the second fixing sleeve 40 may both be hollow structures with openings at both ends, or may also be hollow structures with one end open and the other end closed. Taking the example of the first fixing sleeve 30 and the second fixing sleeve 40 being hollow structures with one end open and the other end closed, the closed ends of the first fixing sleeve 30 and the second fixing sleeve 40 can protect the two ends of the battery cell 21, so as to reduce the risk of deformation of the two ends of the battery cell 21 due to vibration and collision with the outer box 10 during transportation or use.

[0059] The first fixing sleeve 30 is sleeved on the outside of the first end of the battery module 20, and the second fixing sleeve 40 is sleeved on the outside of the second end of the battery module 20, and the whole formed by the first fixing sleeve 30, the second fixing sleeve 40 and the battery module 20 is adapted to the size of the accommodating cavity 11, so that the whole formed by the first fixing sleeve 30, the second fixing sleeve 40 and the battery module 20 can be limited in the accommodating cavity 11, thereby achieving the position fixation of the battery module 20. In this way, in the process of glue filling from the gap between the battery module 20 and the cavity wall of the accommodating cavity 11, the possibility of the battery module 20 being moved by the colloid is small, which reduces the risk of position displacement caused by the movement of the battery module 20, makes the glue filling more uniform, and also facilitates the subsequent assembly of other components in the battery 1.

[0060] It is worth mentioning that due to the arrangement of the first fixing sleeve 30 and the second fixing sleeve 40, a gap is formed between the battery module 20 and the cavity wall of the accommodating cavity 11. During the glue filling process, the colloid fills part of the gap between the battery module 20 and the cavity wall of the accommodating cavity 11. After the colloid solidifies, the battery module 20 is fixed in the accommodating cavity 11. In this way, during actual transportation or use, the battery module 20 is always fixed relative to the outer box 10, avoiding the situation where the battery module 20 shakes in the outer box 10 and collides with the outer box 10 and is damaged. The existence of the gap between the battery module 20 and the cavity wall of the accommodating cavity 11 that is not filled with colloid can reduce the risk of further squeezing the battery module 20 when the outer box 10 of the battery 1 is squeezed from the outside, and the battery 1 is safer to use.

[0061] Please refer again Figure 3 and Figure 4Further, in some optional embodiments, the battery module 20 includes a plurality of stacked battery cells 21; the battery cells 21 have first pole ends and second pole ends that are oppositely disposed, that is, in this embodiment, the positive pole and the negative pole of the battery cell 21 are disposed at opposite ends of the battery cell 21 along the length direction thereof. The first pole ends of all the battery cells 21 are the first ends, and the second pole ends of all the battery cells 21 are the second ends.

[0062] In this embodiment, for example, at the same end of the battery module 20, the positive poles and negative poles of different battery cells 21 are alternately arranged in the stacking direction of the battery cells 21, and the poles 25 of opposite polarities of each two adjacent battery cells 21 are connected by a busbar 24 to realize the series connection of the battery cells 21. Alternatively, the battery cell 21 has a pole end 22 and a non-pole end 23 that are arranged oppositely, that is, in this embodiment, the positive pole and the negative pole of the battery cell 21 are arranged at the same end of the battery cell 21 along its length direction, the pole end 22 of all the battery cells 21 is the first end, and the non-pole end 23 of all the battery cells 21 is the second end.

[0063] In this embodiment, for example, at the same end of the battery module 20, the positive poles and negative poles of different battery cells 21 are arranged alternately and in a straight line in the stacking direction of the battery cells 21, and the poles 25 with opposite polarities of every two adjacent battery cells 21 located on the same straight line are connected by a busbar component 24 to realize the series connection of the two battery cells 21.

[0064] In this embodiment, by designing the first fixing sleeve 30 and the second fixing sleeve 40, at least one of the first fixing sleeve 30 and the second fixing sleeve 40 can also protect the pole 25 of the battery cell 21 on which it is mounted, so as to reduce the risk of damage caused by collision between the positive pole and the negative pole and the outer box 10.

[0065] Combination Figure 3 , Figure 4 and Figure 6 Furthermore, in some optional embodiments, a glue hole 41 is opened on at least one of the first fixing sleeve 30 and the second fixing sleeve 40, and in the stacking direction X of the battery cells 21, the height of the glue hole 41 is lower than the total height of all the stacked battery cells 21.

[0066] Taking the battery cell 21 having the first pole end and the second pole end arranged oppositely as an example, either or both of the first fixing sleeve 30 and the second fixing sleeve 40 are provided with a glue hole 41. Taking the battery cell 21 having the pole end 22 and the non-pole end 23 arranged oppositely as an example, it is recommended to provide the glue hole 41 on the second fixing sleeve 40. Generally, the glue has insulating properties, and the glue should be avoided as much as possible from contacting with the pole 25, the busbar 24, the first output electrode 27 and the second output electrode 28, so as to reduce the risk of the glue contacting with the pole 25, the busbar 24, the first output electrode 27 and the second output electrode 28 and insulating them and affecting the battery 1. Therefore, when the battery cell 21 has the pole end 22 and the non-pole end 23 arranged oppositely, the glue should be poured from a position close to the second fixing sleeve 30 as much as possible.

[0067] Taking the second fixing sleeve 30 having the glue hole 41 as an example, during the actual glue pouring, the colloid can be poured from between the first fixing sleeve 30 and the second fixing sleeve 40 and aligned with the gap between the battery module 20 and the cavity wall of the accommodating cavity 11, or can also be poured from the glue hole 41. Taking the example of the colloid being poured from between the first fixing sleeve 30 and the second fixing sleeve 40 and aligned with the gap between the battery module 20 and the cavity wall of the accommodating cavity 11, the colloid has fluidity. When the colloid invades the gap between the second fixing sleeve 40 and the battery module 20 and reaches the height of the glue hole 41, the colloid can also penetrate from the glue hole 41 into the gap between the second fixing sleeve 40 and the cavity wall of the accommodating cavity 11. Then, after the colloid is solidified, the colloid can adhere the battery module 20 to the outer box 10, the battery module 20 to the second fixing sleeve 40, and the second fixing sleeve 40 to the outer box 10, thereby improving the reliability of the fixation of the battery module 20. Taking the example of injecting the colloid through the glue hole 41, in this case, the colloid can penetrate into the gap between the second fixing sleeve 40 and the battery module 20 through the glue hole 41, thereby facilitating the fixation between the battery module 20 and the second fixing sleeve 40 and improving the reliability of the fixation of the battery module 20.

[0068] In addition, the height of the glue hole 41 is lower than the total height of the stack of all battery cells 21. In this case, when the colloid is about to pass through the glue hole 41, the glue filler can be prompted to stop filling. In this way, the colloid will not cover the top surface of the topmost battery cell 21 to form a gap between the topmost battery cell 21 and the cavity wall of the accommodating cavity 11. In the process of actual application, the battery cell 21 will generate gas during operation, and expand mainly in the stacking direction X of the battery cell 21. The gap between the topmost battery cell 21 and the cavity wall of the accommodating cavity 11 can form a reserved expansion space to allow the battery cell 21 to expand, thereby weakening the risk of the battery cell 21 expanding and squeezing the outer box 10, causing the outer box 10 to deform, and the battery 1 has higher working reliability.

[0069] As an example, the number of the glue holes 41 is not limited to one. For example, there may be a plurality of glue holes 41 , and the plurality of glue holes 41 are arranged at intervals along the stacking direction X of the battery cells 21 .

[0070] Please refer again Figure 4 and Figure 5 In some optional embodiments, when the battery cell 21 has a first pole end and a second pole end that are arranged oppositely, at least one of the first fixing sleeve 30 and the second fixing sleeve 40 is provided with at least one of the pole avoidance holes 33, the first avoidance holes 34, the second avoidance holes 35 and the explosion-proof avoidance holes 36 on the end surface away from the battery module 20. When the battery cell 21 has a pole end 22 and a non-pole end 23 that are arranged oppositely, at least one of the pole avoidance holes 33, the first avoidance holes 34, the second avoidance holes 35 and the explosion-proof avoidance holes 36 is provided on the end surface of the first fixing sleeve 30 that is away from the battery module 20.

[0071] The pole avoidance hole 33 is used to avoid the pole 25 of the battery cell 21, the first avoidance hole 34 is used to avoid the temperature measuring component for detecting the temperature of the battery module 20, the second avoidance hole 35 is used to avoid the pressure measuring component for detecting the voltage of the battery module 20, and the explosion-proof avoidance hole 36 is used to avoid the explosion-proof valve 26 of the battery cell 21.

[0072] Among them, an explosion-proof valve 26 is usually provided at one end of the battery cell 21 having the pole 25. Therefore, in order to improve the air avoidance effect, when the battery cell 21 has a first pole end and a second pole end relatively set, the end faces of the first fixing sleeve 30 and the second fixing sleeve 4 away from the battery module 20 should both be provided with pole air avoidance holes 33 and explosion-proof air avoidance holes 36 as much as possible. When the battery cell 21 has a pole end 22 and a non-pole end 23 relatively set, the pole air avoidance holes 33 and explosion-proof air avoidance holes 36 are only provided on the end face of the first fixing sleeve 30 away from the battery module 20.

[0073] The poles 25 of different battery cells 21 at the same end of the battery module 20 may share a pole avoidance hole 33, or the poles 25 of different battery cells 21 at the same end of the battery module 20 may correspond to different pole avoidance holes 33, which is not limited to the specific details here. Similarly, the explosion-proof valves 26 of different battery cells 21 at the same end of the battery module 20 may share a explosion-proof avoidance hole 36, or the explosion-proof valves 26 of different battery cells 21 at the same end of the battery module 20 may correspond to different explosion-proof avoidance holes 36, which is not limited to the specific details here.

[0074] The temperature measuring element and the pressure measuring element are selectively arranged at the first end and the second end of the battery module 20, so the first air avoidance hole 34 and the second air avoidance hole 35 are also selectively arranged on the first fixing sleeve 30 and the second fixing sleeve 40. For example, taking the temperature measuring element and the pressure measuring element being arranged at the first end as an example, the first air avoidance hole 34 and the second air avoidance hole 35 are only opened on the first fixing sleeve 30.

[0075] The design of at least one of the pole air avoidance hole 33, the first air avoidance hole 34, the second air avoidance hole 35 and the explosion-proof air avoidance hole 36 facilitates the installation of the battery module 20 and the first fixing sleeve 30 and the second fixing sleeve 40, and can avoid air for at least one of the pole 25, the temperature measuring component, the pressure measuring component and the explosion-proof valve 26.

[0076] In some optional embodiments, when the battery cell 21 has a first pole end and a second pole end that are relatively arranged, the end surface of the first fixing sleeve 30 away from the battery module 20 and the end surface of the second fixing sleeve 40 away from the battery module 20 are both provided with a first groove 37, a second groove 38 and a pole avoidance hole 33, the first output electrode 27 is located at the first end of the battery module 20 and is aligned with the first groove 37 of the first fixing sleeve 30, and the first output electrode 27 is partially confined in the first groove 37 of the first fixing sleeve 30 and is electrically connected to the positive electrode of the first end, the second output electrode 28 is located at the second end of the battery module 20 and is aligned with the first groove 37 of the second fixing sleeve 40, and the second output electrode 28 is partially confined in the first groove 37 of the second fixing sleeve 40 and is electrically connected to the negative electrode of the second end.

[0077] When the battery cell 21 has a pole end 22 and a non-pole end 23 that are relatively arranged, the end surface of the first fixing sleeve 30 away from the battery module 20 is provided with two first grooves 37, a second groove 38 and a pole avoidance hole 33, the first output electrode 27 and the second output electrode 28 are both located at the first end, the first output electrode 27 is aligned with one of the first grooves 37, and the first output electrode 27 is partially confined in one of the first grooves 37 of the first fixing sleeve 30 and is electrically connected to the positive electrode of the first end, the second output electrode 28 is aligned with the other first groove 37, and the second output electrode 28 is partially confined in the other first groove 37 of the first fixing sleeve 30 and is electrically connected to the negative electrode of the first end.

[0078] The pole avoidance hole 33 is located in a second groove 38 corresponding to the converging component 24 connected to the pole 25 to be avoided. The converging component 24 corresponds to the second groove 38 one by one, and the converging component 24 is confined in the corresponding second groove 38 .

[0079] In this design, the first fixing sleeve 30 and / or the second fixing sleeve 40 can be used to limit and fix the busbar component 24, the first output electrode 27 and the second output electrode 28. Moreover, the space occupied by the busbar component 24, the first output electrode 27 and the second output electrode 28 is reduced, and the space utilization rate of the battery 1 is higher.

[0080] See also Figures 2 to 4 In some optional embodiments, when the battery cell 21 has a first pole end and a second pole end that are oppositely disposed, two first foaming components 50 that are spaced apart are filled between at least one side of the battery cell 21 and the cavity wall of the accommodating cavity 11, and the two first foaming components 50 on each side are located between the first fixing sleeve 30 and the second fixing sleeve 40, and one of the first foaming components 50 abuts against the first fixing sleeve 30, and the other first foaming component 50 abuts against the second fixing sleeve 40. In this embodiment, the colloid is poured between the two first foaming components 50 located on the same side of the battery cell 21.

[0081] The first foaming component 50 may be pearl cotton, sponge or other foaming components.

[0082] The glue is insulating, and the glue should be avoided from contacting the pole 25, the current collecting part 24, the first output electrode 27 and the second output electrode 28 as much as possible. In this embodiment, by setting one of the first foaming parts 50 to abut against the first fixing sleeve 30, and the other first foaming part 50 to abut against the second fixing sleeve 40, when the colloid is poured between the two first foaming parts 50 located on the same side of the battery cell 21, the first fixing sleeve 30 and the second fixing sleeve 40 can prevent the colloid from flowing to the first end and the second end of the battery module 20, thereby reducing the risk of the colloid contacting the pole 25, the current collecting part 24, the first output electrode 27 and the second output electrode 28, and ensuring the reliability of the current input and output of the battery 1. In addition, the first foaming part 50 forms an extrusion between the battery cell 21 and the cavity wall of the accommodating cavity 11, so that the installation of the battery cell 21 is more reliable, and the risk of the battery cell 21 shaking due to the existence of the gap is reduced. Furthermore, it is worth mentioning that the first foam component 50 has a certain elasticity. When the battery cell 21 expands a little along the side, the first foam component 50 can absorb the expanded size to avoid squeezing the cavity wall of the accommodating cavity 11 due to the expansion of the battery cell 21.

[0083] When the battery cell 21 has a pole end 22 and a non-pole end 23 that are arranged opposite to each other, a first foaming component 50 is filled between at least one side of the battery cell 21 and the cavity wall of the accommodating cavity 11, and the first foaming component 50 on each side is located between the first fixing sleeve 30 and the second fixing sleeve 40, and abuts against the first fixing sleeve 30. In this embodiment, glue is poured through the gap between the first foaming component 50 and the second fixing sleeve 40, or through the glue hole 41 on the second fixing sleeve 40.

[0084] The first foaming member 50 in this embodiment can prevent the colloid from flowing to the first end of the battery module 20, and can also reduce the risk of the colloid contacting the pole 25, the current collecting member 24, the first output electrode 27 and the second output electrode 28. In addition, the first foaming member 50 can also absorb the size of the expansion of the battery cell 21, reducing the compression of the outer box 10 by the expansion of the battery cell 21.

[0085] See also Figure 5 In some optional embodiments, the battery 1 further includes a second foaming component 60 filled between each two adjacent battery cells 21. Similarly, the second foaming component 60 can be pearl cotton, sponge or other foaming components.

[0086] The second foaming component 60 is filled between each two adjacent battery cells 21, so that the colloid cannot penetrate between each two adjacent battery cells 21, so as to avoid the colloid solidifying and adhering the adjacent battery cells 21 firmly, and facilitate the subsequent disassembly of the battery cells 21. In addition, the second foaming component 60 has a certain elasticity, and the second foaming component 60 can absorb the expanded size of the battery cell 21, reducing the risk of adjacent battery cells 21 being squeezed and deformed due to expansion, which helps to further improve the reliability of the battery 1.

[0087] See also Figure 4 and Figure 6 In some optional embodiments, the end surface of the first fixing sleeve 30 away from the battery module 20 and the end surface of the second fixing sleeve 40 away from the battery module 20 are both provided with limiting ribs 31 protruding in the direction away from the battery module 20; and / or, the two side surfaces of the first fixing sleeve 30 opposite to and away from the battery module 20 are both provided with limiting ribs 31 protruding in the direction away from the battery module 20; and / or, the two side surfaces of the second fixing sleeve 40 opposite to and away from the battery module 20 are both provided with limiting ribs 31 protruding in the direction away from the battery module 20.

[0088] For example, the end surface of the first fixing sleeve 30 away from the battery module 20 and the end surface of the second fixing sleeve 40 away from the battery module 20 are both provided with limiting ribs 31 protruding in the direction away from the battery module 20; and the two side surfaces of the first fixing sleeve 30 opposite to and away from the battery module 20 are both provided with limiting ribs 31 protruding in the direction away from the battery module 20; and the two side surfaces of the second fixing sleeve 40 opposite to and away from the battery module 20 are both provided with limiting ribs 31 protruding in the direction away from the battery module 20.

[0089] Taking the first fixing sleeve 30 as an example, which is sleeved on the first end formed by the pole ends 22 of all the battery cells 21 and the second fixing sleeve 40 as an example, which is sleeved on the second end formed by the non-pole ends 23 of all the battery cells 21, the end face of the first fixing sleeve 30 away from the battery module 20 is the end face of the first fixing sleeve 30 away from the battery module 20 in the length direction of the battery cell 21, the end face of the second fixing sleeve 40 away from the battery module 20 is the end face of the first fixing sleeve 40 away from the battery module 20 in the length direction of the battery cell 21, the two side faces of the first fixing sleeve 30 opposite and away from the battery module 20 are the two side faces of the first fixing sleeve 30 arranged along the width direction of the battery cell 21, and the two side faces of the second fixing sleeve 40 opposite and away from the battery module 20 are the two side faces of the second fixing sleeve 40 arranged along the width direction of the battery cell 21.

[0090] There can be one or more limiting ribs 31 on the same surface of the first fixing sleeve 30, and there can be one or more limiting ribs 31 on the same surface of the second fixing sleeve 40, and the specific number is not limited. The setting of the limiting ribs 31 is conducive to improving the reliability and stability of the fixing of the battery cell 21.

[0091] See also Figure 3 and Figure 4 In some optional embodiments, the battery 1 further includes a tightening sleeve 70 , which is located between the first fixing sleeve 30 and the second fixing sleeve 40 and is sleeved outside all the battery cells 21 . The tightening sleeve 70 is used to tighten all the battery cells 21 .

[0092] For example, the tightening sleeve 70 is an elastic and insulating elastic sleeve, such as an elastic sleeve. Of course, the tightening sleeve 70 can also be a belt-like structure without elasticity, through which all battery cells 21 are wound and knotted to form a tightening sleeve 70 with a fixed size and capable of tightening all battery cells 21.

[0093] The tightening sleeve 70 can tighten all the battery cells 21 so that all the battery cells 21 form a solid whole. In this way, not only the risk of mutual movement between the battery cells 21 is reduced, but also the compactness of the stacking between the battery cells 21 is improved, so that the gaps between the battery cells 21 are smaller, and the risk of colloid invading between the battery cells 21 and sticking the battery cells 21 together is weakened. After tightening, all the battery cells 21 can be fixed and positioned in the accommodating cavity 11 by using the first fixing sleeve 30 and the second fixing sleeve 40. The setting of the tightening sleeve 70 also facilitates the installation of the first fixing sleeve 30 and the second fixing sleeve 40 to a certain extent.

[0094] In some optional embodiments, the first fixing sleeve 30 and the second fixing sleeve 40 are arranged at an interval, and the gap structure between the first fixing sleeve 30 and the second fixing sleeve 40 forms a space allowing the battery module 20 to expand; in this way, the battery cell 21 can expand in the space, reducing the risk of squeezing the first fixing sleeve 30 and the second fixing sleeve 40 when the battery cell 21 expands, thereby improving the working performance of the battery 1.

[0095] For example, when the first fixing sleeve 30 is sleeved on the first end formed by the pole ends 22 of all battery cells 21, and the second fixing sleeve 40 is sleeved on the second end formed by the non-pole ends 23 of all battery cells 21, the middle part of the battery cell 21 between the pole end 22 and the non-pole end 23 is exposed in the space. The middle part of the battery cell 21 is the part that mainly expands when the battery cell 21 is working. The middle part of the battery cell 21 is exposed in the space formed by the gap structure of the first fixing sleeve 30 and the second fixing sleeve 40, and can expand in the space, reducing the risk of squeezing the first fixing sleeve 30 and the second fixing sleeve 40 when the battery cell 21 expands.

[0096] In some optional embodiments, at least the first fixing sleeve 30 and the second fixing sleeve 40 have corner avoidance holes 32 at their top corners, and the corner avoidance holes 32 are used to avoid the corners of the battery module 20. The corners of the battery module 20 are formed by the corner structures of the battery cells 21.

[0097] For example, only each corner of the top of the first fixing sleeve 30 and the second fixing sleeve 40 is provided with a corner avoidance hole 32 , and the corners of the battery module 20 extend out from the corresponding corner avoidance hole 32 .

[0098] Since the corners of the battery module 20 are relatively sharp, when the corners of the battery module 20 abut against the first fixing sleeve 30 and the second fixing sleeve 40, the pressure at the contact position between the corners of the battery module 20 and the first fixing sleeve 30 and the second fixing sleeve 40 is relatively large, which can easily cause the first fixing sleeve 30 and the second fixing sleeve 40 to deform or crack. In the present application, the provision of the corner avoidance holes 32 reduces the risk of the corners of the battery cells 21 squeezing the tops of the first fixing sleeve 30 and the second fixing sleeve 40, thereby extending the service life of the first fixing sleeve 30 and the second fixing sleeve 40.

[0099] In the above-mentioned battery 1, the first fixing sleeve 30 is sleeved on the outside of the first end of the battery module 20, the second fixing sleeve 40 is sleeved on the outside of the second end of the battery module 20, and the whole formed by the first fixing sleeve 30, the second fixing sleeve 40 and the battery module 20 can be limited in the accommodating cavity 11, so as to achieve the position fixation of the battery module 20. In this way, in the process of glue injection from the gap between the battery module 20 and the cavity wall of the accommodating cavity 11, the possibility of the battery module 20 being affected by the colloid and moving is small, which reduces the risk of position displacement caused by the movement of the battery module 20, makes the glue injection more uniform, and also facilitates the subsequent assembly of other components in the battery 1.

[0100] 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.

[0101] 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: The outer box (10) is provided with a receiving chamber (11); A battery module (20) having a first end and a second end opposite to each other; and A first fixing sleeve (30) and a second fixing sleeve (40), wherein the first fixing sleeve (30) is sleeved outside the first end, and the second fixing sleeve (40) is sleeved outside the second end; The first fixing sleeve (30), the second fixing sleeve (40) and the battery module (20) cooperate with each other and are confined within the accommodating cavity (11).

2. The battery according to claim 1, characterized in that The end surface of the first fixing sleeve (30) away from the battery module (20) and the end surface of the second fixing sleeve (40) away from the battery module (20) are both provided with limiting convex ribs (31) protruding in a direction away from the battery module (20); and / or Both sides of the first fixing sleeve (30) that are opposite to and away from the battery module (20) are provided with limiting convex ribs (31) that protrude in a direction away from the battery module (20); and / or Both side surfaces of the second fixing sleeve (40) that are opposite to and away from the battery module (20) are provided with limiting convex ribs (31) that protrude in a direction away from the battery module (20).

3. The battery according to claim 1, characterized in that The battery module (20) comprises a plurality of stacked battery cells (21); The battery cell (21) has a first pole end and a second pole end that are arranged opposite to each other, the first pole end of all the battery cells (21) is the first end, and the second pole end of all the battery cells (21) is the second end; or The battery cell (21) has a pole end (22) and a non-pole end (23) arranged opposite to each other, the pole end (22) of all the battery cells (21) being the first end, and the non-pole end (23) of all the battery cells (21) being the second end.

4. The battery according to claim 3, characterized in that When the battery cell (21) has a first pole end and a second pole end that are arranged opposite to each other, at least one of the first fixing sleeve (30) and the second fixing sleeve (40) is provided with at least one of a pole avoidance hole (33), a first avoidance hole (34), a second avoidance hole (35) and an explosion-proof avoidance hole (36) on an end surface away from the battery module (20); When the battery cell (21) has a pole end (22) and a non-pole end (23) arranged opposite to each other, the end surface of the first fixing sleeve (30) away from the battery module (20) is provided with at least one of a pole avoidance hole (33), a first avoidance hole (34), a second avoidance hole (35) and an explosion-proof avoidance hole (36); The pole avoidance hole (33) is used to avoid the pole (25) of the battery cell (21); the first avoidance hole (34) is used to avoid a temperature measuring component for detecting the temperature of the battery module (20); the second avoidance hole (35) is used to avoid a pressure measuring component for detecting the voltage of the battery module (20); and the explosion-proof avoidance hole (36) is used to avoid an explosion-proof valve (26) of the battery cell (21).

5. The battery according to claim 3, characterized in that The battery module (20) further comprises a busbar component (24), a first output electrode (27) and a second output electrode (28), wherein the poles (25) of two adjacent battery cells (21) located at the same end of the battery module (20) are electrically connected via the busbar component (24); When the battery cell (21) has a first pole end and a second pole end that are arranged opposite to each other, the end surface of the first fixing sleeve (30) away from the battery module (20) and the end surface of the second fixing sleeve (40) away from the battery module (20) are both provided with a first groove (37), a second groove (38) and a pole avoidance hole (33), the pole avoidance hole (33) being used to avoid the pole (25) of the battery cell (21), and the pole avoidance hole (33) is located on the converging component connected to the pole (25) to be avoided. The first output electrode (27) is partially located in the first groove (37) of the first fixing sleeve (30) and is electrically connected to the positive electrode of the first end; the second output electrode (28) is partially located in the first groove (37) of the second fixing sleeve (40) and is electrically connected to the negative electrode of the second end; the current collecting component (24) corresponds to the second groove (38) one by one, and the current collecting component (24) is limited to the corresponding second groove (38).

6. The battery according to claim 3, characterized in that The battery module (20) further comprises a busbar component (24), a first output electrode (27) and a second output electrode (28), wherein the poles (25) of two adjacent battery cells (21) located at the same end of the battery module (20) are electrically connected via the busbar component (24); When the battery cell (21) has a pole end (22) and a non-pole end (23) arranged opposite to each other, the end surface of the first fixing sleeve (30) away from the battery module (20) is provided with two first grooves (37), a second groove (38) and a pole avoidance hole (33), the pole avoidance hole (33) being used to avoid the pole (25) of the battery cell (21), and the pole avoidance hole (33) is located at the second groove (37) corresponding to the current collecting component (24) connected to the pole (25) to be avoided. 38), the first output electrode (27) is partially located in one of the first grooves (37) of the first fixing sleeve (30) and is electrically connected to the positive electrode of the first end, the second output electrode (28) is partially located in another of the first grooves (37) of the first fixing sleeve (30) and is electrically connected to the negative electrode of the first end, the current collecting component (24) corresponds to the second grooves (38) one by one, and the current collecting component (24) is limited to the corresponding second groove (38).

7. The battery according to claim 3, characterized in that When the battery cell (21) has a first pole end and a second pole end that are arranged opposite to each other, two first foaming components (50) that are arranged at intervals are filled between at least one side of the battery cell (21) and the cavity wall of the accommodating cavity (11), and the two first foaming components (50) on each side are located between the first fixing sleeve (30) and the second fixing sleeve (40), and one of the first foaming components (50) abuts against the first fixing sleeve (30), and the other first foaming component (50) abuts against the second fixing sleeve (40); When the battery cell (21) has a pole end (22) and a non-pole end (23) that are arranged opposite to each other, a first foaming component (50) is filled between at least one side of the battery cell (21) and the cavity wall of the accommodating cavity (11), and the first foaming component (50) on each side is located between the first fixing sleeve (30) and the second fixing sleeve (40), and abuts against the first fixing sleeve (30).

8. The battery according to claim 3, characterized in that The battery further comprises a second foaming component (60) filled between each two adjacent battery cells (21); and / or The battery further comprises a tightening sleeve (70), the tightening sleeve (70) being located between the first fixing sleeve (30) and the second fixing sleeve (40) and being sleeved outside all the battery cells (21), the tightening sleeve (70) being used for tightening all the battery cells (21).

9. The battery according to claim 3, characterized in that At least one of the first fixing sleeve (30) and the second fixing sleeve (40) is provided with a glue hole (41); in the stacking direction (X) of the battery cells (21), the height of the glue hole (41) is lower than the total height of all the stacked battery cells (21).

10. The battery according to any one of claims 1 to 9, characterized in that: The first fixing sleeve (30) and the second fixing sleeve (40) are arranged at an interval, and a gap between the first fixing sleeve (30) and the second fixing sleeve (40) forms a space allowing the battery module (20) to expand; and / or At least the first fixing sleeve (30) and the second fixing sleeve (40) are provided with corner avoidance holes (32) at the corners of the tops, and the corner avoidance holes (32) are used to avoid the corners of the battery module (20).

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