CN220873749U - Battery pack, glue overflow detection tool and electric equipment - Google Patents

Abstract

The application relates to the technical field of batteries, in particular to a battery pack, a glue overflow detection tool and electric equipment. The exhaust structure comprises a first shell, a second shell and a bonding part, wherein the first shell and the second shell are enclosed to form an exhaust channel. The first shell comprises a first connecting part and first side walls arranged at two ends of the first connecting part. The second shell comprises a second connecting part and second side walls arranged at two ends of the second connecting part. A glue injection gap is formed between end faces of the first side wall and the second side wall, which face each other, and at least part of the first side wall and the second side wall is connected with the outer side wall face of the second side wall, and the bonding part is arranged in the glue injection gap. According to the battery pack, the glue overflow detection tool and the electric equipment provided by the application, the flatness of the outer side of the exhaust structure is effectively ensured, and the space utilization rate of the battery is improved.

Description

Battery pack, glue overflow detection tool and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a battery pack, a glue overflow detection tool and electric equipment.

Background

With the development of technology, the energy density of lithium ion batteries is higher and higher, and especially the development of quick charge performance is more and more required for the safety of lithium ion batteries. The explosion-proof valve is used for exhausting high-temperature and high-pressure gas as soon as possible when the lithium ion battery is out of control, so that the influence on other lithium ion batteries is prevented. The exhaust structure is used as a channel for connecting the explosion-proof valve with the outside, and when the battery encounters an extreme condition or accidents, the battery core is out of control, toxic gas is timely discharged. Therefore, the sealability and structural strength of the vent structure determine the safety of the battery pack.

Today's exhaust structure often includes carrier and flue body, and flue body and carrier both bond through the mode of injecting glue. However, the current carrier usually supports the flue body from the inner side of the flue body, so that the opening of the glue injection gap between the flue body and the carrier faces the outer side of the exhaust structure, and once glue injection overflows during the assembly of the exhaust structure, the space outside the exhaust structure is very easy to occupy, on one hand, the space outside the exhaust structure is occupied after the overflowed glue injection is solidified, so that other structures in the battery are difficult to be attached to the outer wall of the exhaust structure, and the space utilization rate of the battery is affected; the other party affects the cleanliness and aesthetics of the exhaust structure.

Disclosure of utility model

The application aims to provide a battery pack, a glue overflow detection tool and electric equipment, so that the problem that a current bearing piece in the prior art usually supports a flue body from the inner side of the flue body to a certain extent, so that an opening of a glue injection gap between the flue body and the bearing piece faces the outer side of an exhaust structure; the other party affects the technical problem of the neatness and the aesthetic property of the exhaust structure.

According to a first aspect of the present application there is provided a battery pack comprising a battery cell and a vent structure capable of communicating with the battery cell;

The battery cell is provided with an explosion-proof valve;

The exhaust structure comprises a first shell, a second shell and a bonding part, wherein the first shell and the second shell are buckled to form an exhaust channel in a surrounding mode, one of the first shell and the second shell is provided with an air inlet, and the explosion-proof valve corresponds to the air inlet in position, so that when the explosion-proof valve breaks, gas generated in the battery monomer enters the exhaust channel through the air inlet;

The first shell comprises a first connecting part and first side walls arranged at two ends of the first connecting part in a first direction;

The second shell comprises a second connecting part and second side walls arranged at two ends of the second connecting part in the first direction;

An injection gap is formed between end surfaces of the first side wall and the second side wall, which face each other, and at least part of a first one of the first side wall and the second side wall is connected with an outer side wall surface of a second one of the first side wall and the second side wall, and the bonding part is arranged in the injection gap to connect the first shell and the second shell.

Preferably, the ratio of the filling volume of the bonding part to the volume of the glue injection gap is 80% -120%.

Preferably, the ratio of the filling volume of the bonding part to the volume of the glue injection gap is 90% -110%.

Preferably, the first housing further includes a blocking protrusion, the blocking protrusion is fixed on a side of the first connection portion facing the second housing, and the blocking protrusion is disposed corresponding to the first sidewall;

The adhesive blocking protrusions are arranged at intervals along the first direction with the first side walls, and at least part of the adhesive blocking protrusions are arranged opposite to the corresponding inner side wall surfaces of the second side walls.

Preferably, the side surface of the glue blocking protrusion facing away from the first side wall is aligned with the inner side wall of the second side wall, so that the glue injection gap is divided into a first portion and a second portion in the first direction, the first portion is located between the first connecting portion and the second side wall, the second portion is located between the glue blocking protrusion and the second side wall, and the gap size of the second portion is smaller than that of the first portion.

Preferably, the first connecting part is provided with an air inlet, the air inlet is communicated with the exhaust channel, and the pressure release valve of the battery unit is in butt joint with the air inlet;

The distance between the two glue blocking protrusions, which are respectively arranged corresponding to the two first side walls, in the first direction is greater than the length of the opening of the air inlet in the first direction.

Preferably, the second housing further includes an abutment edge portion, and an end of the second sidewall opposite to the first connection portion abuts against the abutment edge portion.

Preferably, the abutting edge is arranged on the second side wall, or

The abutting edge part is arranged on the second connecting part.

According to a second aspect of the present application, there is provided a glue overflow detection tool for detecting the above-mentioned battery pack;

The glue overflow detection tool comprises an extending part and a limiting plate part, wherein the extending part is fixedly arranged on the limiting plate part, the shape of the cross section of the extending part is matched with the shape of the air inlet, and the thickness of the extending part is larger than that of the first connecting part;

When the first shell is connected with the second shell through the bonding part, whether the bonding part overflows and is excessive is judged through whether the extending part can be inserted into the exhaust channel through the air inlet.

According to a third aspect of the present application, there is provided an electric device, including the battery pack according to any one of the above-mentioned aspects, so that the battery pack has all the beneficial technical effects, and will not be described herein.

Compared with the prior art, the application has the beneficial effects that:

According to the battery pack provided by the application, the first side wall and the second side wall are connected with the outer side wall surface of the second side wall, so that the opening of the glue injection gap formed between the end surface of the second side wall and the first side wall can only face the inside of the exhaust structure, and the situation that the bonding part overflows from the glue injection gap is effectively avoided, and the overflowed bonding part is exposed to the outer side of the exhaust structure. The flatness of the outer side of the exhaust structure is effectively guaranteed, and the space utilization rate of the battery is improved.

In order to make the above objects, features and advantages of the present application more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present application, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic diagram of an exhaust structure according to an embodiment of the present application;

FIG. 2 is a schematic diagram of an explosion structure of an exhaust structure according to an embodiment of the present application;

FIG. 3 is a schematic view of an exhaust structure according to an embodiment of the present application;

FIG. 4 is a schematic view of another explosion structure of the exhaust structure according to the embodiment of the present application;

Fig. 5 is another schematic structural diagram of an exhaust structure according to an embodiment of the present application.

Reference numerals:

100-a first housing; 110-a first connection; 120-a first sidewall; 130-blocking the glue bulge; 200-a second housing; 210-a second connection; 220-a second sidewall; 230-abutment edge; 300-exhaust passage; 400-glue injection gap; 410-a first part; 420-a second part; 500-air inlet; 600-glue overflow detection tool; 610—an extension; 620-a limiting plate portion; 700-bond.

F1-a first direction; f2-a second direction; f3-third direction.

Detailed Description

The following description of the embodiments of the present application will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the application are shown.

The components of the embodiments of the present application generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the application, as presented in the figures, is not intended to limit the scope of the application, as claimed, but is merely representative of selected embodiments of the application.

All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the description of the present application, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

The following describes a battery pack, a glue overflow detection tool and electric equipment according to some embodiments of the present application with reference to fig. 1 to 4.

Referring to fig. 1 to 3, an embodiment of a first aspect of the present application provides a battery pack including a battery cell and a vent structure capable of communicating with the battery cell. The exhaust structure includes a first housing 100, a second housing 200, and a bonding portion 700, where the first housing 100 and the second housing 200 are fastened together to enclose and form an exhaust channel 300. The first housing 100 includes a first connection portion 110 and first sidewalls 120 provided at both ends of the first connection portion 110 in a first direction F1. The second case 200 includes a second connection part 210 and second sidewalls 220 disposed at both ends of the second connection part 210 in the first direction F1. When the first and second cases 100 and 200 are in a state of being fastened to each other, a glue injection gap 400 is formed between end surfaces of the first and second sidewalls 120 and 220 facing each other, and at least a portion of a first one of the first and second sidewalls 120 and 220 is connected with an outer sidewall surface of a second one of the first and second sidewalls 120 and 220, and a bonding portion 700 is disposed in the glue injection gap 400 to connect the first and second cases 100 and 200.

According to the battery pack provided by the technical features, the first side wall 120 and the second side wall 220 are connected with the outer side wall surface of the second side wall, so that the opening of the glue injection gap 400 formed between the end surface of the second side wall and the first side wall can only face the inside of the air exhaust channel 300, and the situation that the bonding part 700 overflows when the bonding part 700 overflows from the glue injection gap 400 is effectively avoided, and the bonding part 700 overflows is exposed to the outer side of the air exhaust structure. The flatness of the outer side of the exhaust structure is effectively guaranteed, and the space utilization rate of the battery is improved.

Referring to fig. 1 to 5, F1 in the drawings shows an example of a first direction, F2 in the drawings is defined as a second direction, and F3 is defined as a third direction for convenience of description, wherein any two of the first direction F1, the second direction F2, and the third direction F3 are perpendicular to each other.

Alternatively, the second direction F2 may be parallel to the direction of gravity when the battery pack is in use.

Alternatively, the second direction F2 may be perpendicular to the gravity direction when the battery pack is in use.

Preferably, the ratio of the filling volume of the bonding portion 700 to the volume of the glue injection gap 400 may be 80% -120%, so that the bonding stability of both the first housing 100 and the second housing 200 is ensured, and the connectivity of the single battery is prevented from being influenced by excessive glue overflow.

Further, the ratio of the filling volume of the bonding portion 700 to the volume of the glue injection gap 400 is 90% -110%, so as to further ensure the bonding stability of the first housing 100 and the second housing 200, and avoid the excessive glue overflow from affecting the connectivity of the single battery.

Alternatively, the bonding portion 700 may be glue, heat conductive structural glue, or the like.

Preferably, as shown in fig. 1 to 5, the first one is the first sidewall 120, and the second one is the second sidewall 220, but not limited thereto, and not shown, the first one may be the second sidewall 220, and the second one may be the first sidewall 120.

The structure of the battery pack will be described in detail below with the first one shown in fig. 1 to 5 being the first side wall 120 and the second one being an example of the second side wall 220.

Preferably, as shown in fig. 1 to 5, the first housing 100 may further include a blocking protrusion 130, the blocking protrusion 130 is fixed to a side of the first connection part 110 facing the second housing 200, the blocking protrusion 130 is disposed corresponding to the first sidewall 120, the blocking protrusion 130 is spaced apart from the first sidewall 120 along the first direction F1, and at least part of the blocking protrusion 130 is disposed opposite to an inner sidewall surface of the corresponding second sidewall 220, such that the injection gap 400 is divided into a first portion 410 and a second portion 420 in the first direction F1. The first portion 410 is located between the first connecting portion 110 and the second side wall 220, the second portion 420 is located between the glue blocking protrusion 130 and the second side wall 220, and the gap size of the second portion 420 is smaller than that of the first portion 410, so that the probability of overflowing of the bonding portion 700 is effectively reduced.

It should be noted that the size of the gap of the first portion 410 may be understood as the size of the first portion 410 in the second direction. Similarly, the gap size of the second portion 420 may be understood as the size of the second portion 420 in the second direction.

Preferably, as shown in fig. 1 to 5, the side of the glue blocking protrusion 130 facing away from the first sidewall 120 is aligned with the inner sidewall of the second sidewall 220, so that the space occupied by the glue blocking protrusion 130 is effectively saved.

In an embodiment, as shown in fig. 2 to 5, the first connection portion 110 may be provided with an air inlet 500, the air inlet 500 is in communication with the air outlet 300, and a pressure release valve (e.g. an explosion-proof valve) of the battery unit may be in butt joint with the air inlet 500 to realize communication between the battery unit and the air outlet 300, so as to realize that the pressure release gas rushing out of the battery unit enters the air outlet 300 through the pressure release valve and the air inlet 500, so as to improve the safety of the battery pack.

Preferably, as shown in fig. 2 to 5, the distance between the two glue blocking protrusions 130 respectively corresponding to the two first sidewalls 120 in the first direction F1 is greater than the opening length of the air inlet 500 in the first direction F1, so as to effectively avoid the glue overflow of the bonding portion 700 from blocking the air inlet 500.

Preferably, as shown in fig. 2, the air inlet 500 may be a waist-shaped hole, but is not limited thereto, and the shape of the air inlet may be other shapes, such as a square hole, a round hole, or other shape holes, as long as it can be adapted to the shape of the pressure release valve.

It should be noted that, as shown in fig. 4, the exhaust passage 300 may extend along the third direction F3, that is, the first housing 100 and the second housing 200 may each extend along the third direction F3. The battery pack may include a plurality of the above-described battery cells stacked in the third direction F3. Correspondingly, the first connection part 110 may be provided with a plurality of air inlets 500, and the plurality of air inlets 500 may be disposed at intervals along the third direction F3 such that each battery cell can be disposed corresponding to the corresponding air inlet 500.

It should be noted that, the air inlet 500 is not limited to be disposed in the first connection portion 110, and the air inlet 500 may be disposed in the second connection portion 210 as long as it can be abutted against the corresponding battery cell, and the configuration and the manner of disposition are similar to those of the air inlet 500 disposed in the first connection portion 110, and will not be repeated.

Preferably, as shown in fig. 1 to 5, the second housing 200 may further include an abutting edge 230, and an end of the second sidewall 220 opposite to the first connecting portion 110 abuts against the abutting edge 230, so as to limit both the first housing 100 and the second housing 200 in the second direction F2, and further avoid the adhesive portion 700 from overflowing from the outer side of the air exhaust channel 300 before being solidified.

Preferably, as shown in fig. 1 to 4, the abutting edge 230 may be disposed on the second sidewall 220 to reduce the thickness of the sidewall of the exhaust passage 300, thereby improving the space utilization of the battery pack.

Optionally, as shown in fig. 5, the abutment edge 230 may also be disposed on the second connection portion 210, in other words, a portion of the second connection portion 210 extending to the outside of the exhaust channel 300 with respect to the second sidewall 220 forms the abutment edge 230, so that stability and firmness of the exhaust structure are effectively improved, and safety of the exhaust structure is ensured.

According to a second aspect of the present application, a glue overflow detection tool is provided for detecting the battery pack. As shown in fig. 3 and 4, the battery pack may further include a glue overflow detecting tool 600 for detecting whether the glue overflow of the bonding portion 700 is qualified, so as to further ensure the smoothness of the air inlet 500 and improve the safety of the battery pack.

Specifically, as shown in fig. 4, the glue overflow detecting tool 600 includes an extending portion 610 and a limiting plate portion 620, the extending portion 610 is fixedly disposed on the limiting plate portion 620, the cross section of the extending portion 610 is adapted to the shape of the air inlet 500, and the thickness of the extending portion 610 is greater than the thickness of the first connecting portion 110. When the first housing 100 is connected with the second housing 200 via the bonding portion 700, it is determined whether the bonding portion 700 overflows by whether the protruding portion 610 can be inserted into the exhaust passage 300 via the air inlet 500. If the glue overflows excessively, the extending portion 610 is blocked by the glue overflowed from the bonding portion 700, so that the extending portion 610 cannot extend into the air inlet 500 along the second direction F2, and at this time, the glue overflows can be processed by a machining method to ensure the smoothness of the air inlet 500 and the safety of the battery pack.

According to a third aspect of the present application, there is provided an electric device, including the battery pack according to any one of the above-mentioned aspects, so that the battery pack has all the beneficial technical effects, and will not be described herein.

Alternatively, the electric device may be an automobile, an airplane, a ship, an unmanned aerial vehicle, an electric bicycle, an electric motorcycle, or the like, but is not limited thereto, and the electric device may be other electric devices as long as the battery pack is included.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the application.

Claims (10)

1. A battery pack comprising a battery cell and a vent structure capable of communicating with the battery cell;

The battery cell is provided with an explosion-proof valve;

The exhaust structure comprises a first shell (100), a second shell (200) and a bonding part (700), wherein the first shell (100) is buckled with the second shell (200) to form an exhaust channel (300) in a surrounding mode, one of the first shell (100) and the second shell (200) is provided with an air inlet (500), and the explosion-proof valve corresponds to the air inlet (500) in position, so that when the explosion-proof valve breaks, gas generated in the battery cell enters the exhaust channel (300) through the air inlet (500);

The first housing (100) includes a first connection portion (110) and first side walls (120) provided at both ends of the first connection portion (110) in a first direction (F1);

The second housing (200) includes a second connection portion (210) and second side walls (220) provided at both ends of the second connection portion (210) in the first direction (F1);

An injection gap (400) is formed between end surfaces of the first side wall (120) and the second side wall (220) facing each other, and at least part of one of the first side wall (120) and the second side wall (220) is connected with an outer side wall surface of the other, and the bonding part (700) is arranged in the injection gap (400) so as to connect the first shell (100) and the second shell (200).

2. The battery pack according to claim 1, wherein a ratio of a filling volume of the bonding portion (700) to a volume of the glue-injection gap (400) is 80% to 120%.

3. The battery pack according to claim 1, wherein a ratio of a filling volume of the bonding portion (700) to a volume of the glue injection gap (400) is 90% to 110%.

4. The battery pack according to claim 1, wherein the first case (100) further includes a blocking protrusion (130), the blocking protrusion (130) being fixed to a side of the first connection portion (110) facing the second case (200), the blocking protrusion (130) being disposed in correspondence with the first side wall (120);

The glue blocking protrusions (130) and the first side walls (120) are arranged at intervals along the first direction (F1), at least part of the glue blocking protrusions (130) are arranged opposite to the corresponding inner side wall surfaces of the second side walls (220), so that the glue injection gap (400) is divided into a first portion (410) and a second portion (420) in the first direction (F1), the first portion (410) is located between the first connecting portion (110) and the second side walls (220), the second portion (420) is located between the glue blocking protrusions (130) and the second side walls (220), and the gap size of the second portion (420) is smaller than that of the first portion (410).

5. The battery pack of claim 4, wherein the battery pack comprises a plurality of battery cells,

The side surface of the adhesive blocking protrusion (130) facing away from the first side wall (120) is aligned with the inner side wall of the second side wall (220).

6. The battery pack of claim 4, wherein the battery pack comprises a plurality of battery cells,

The first connecting part (110) is provided with an air inlet (500), the air inlet (500) is communicated with the exhaust channel (300), and the pressure release valve of the battery unit is in butt joint with the air inlet (500);

The distance between the two glue blocking protrusions (130) which are respectively arranged corresponding to the two first side walls (120) in the first direction (F1) is larger than the opening length of the air inlet (500) in the first direction (F1).

7. The battery pack according to claim 1, wherein the second housing (200) further includes an abutment edge portion (230), and an end of the second side wall (220) facing away from the first connection portion (110) abuts the abutment edge portion (230).

8. The battery pack of claim 7, wherein the battery pack comprises a plurality of battery cells,

The abutting edge part (230) is arranged on the second side wall (220), or

The abutting edge portion (230) is provided to the second connecting portion (210).

9. A glue overflow detection tool, which is used for detecting the battery pack according to claim 6;

The glue overflow detection tool (600) comprises an extending part (610) and a limiting plate part (620), wherein the extending part (610) is fixedly arranged on the limiting plate part (620), the shape of the cross section of the extending part (610) is matched with the shape of the air inlet (500), and the thickness of the extending part (610) is larger than that of the first connecting part (110);

When the first housing (100) is connected with the second housing (200) via the bonding portion (700), it is determined whether the bonding portion (700) overflows by whether the protruding portion (610) can be inserted into the exhaust passage (300) via the air inlet (500).

10. A powered device comprising a battery pack as claimed in any one of claims 1 to 8.