CN218334040U - Battery box and battery device - Google Patents

Abstract

The utility model discloses a battery box and battery device, boundary beam surface are provided with the recess, have the sealing strip in the recess, the sealing strip respectively with tank bottom and layer board contact, can realize that the first way of boundary beam and layer board junction is sealed through the sealing strip, the second way that rethread sealing glue realized boundary beam and layer board junction is sealed, through the sealed effect that improves battery box of twice. And, through the width to the sealing strip, the first distance between the axis of recess and fastener, and the setting of the product of the width of sealing strip and first distance, can improve the roughness of sealing strip and tank bottom contact, avoid the easy inefficacy that causes when the sealing strip width is too little, can also improve the compaction effect to the sealing strip simultaneously, cause harmful effects to the recess when avoiding the fastener assembly, can also avoid in addition because of the too wide space waste that causes with the first distance of sealing strip, thereby when improving the sealed effect of battery box, improve space utilization.

Description

Battery box and battery device

Technical Field

The utility model relates to a battery technology field indicates a battery box and battery device especially.

Background

The battery pack generally includes: the box and be located the battery in the box, the box generally includes: boundary beam and the liquid cooling board that is located the bottom, when liquid cooling board passes through the fastener with the boundary beam and is connected, how to guarantee the leakproofness of liquid cooling board and boundary beam junction, can also improve space utilization simultaneously, the technical problem that the skilled person needs a lot of solution.

SUMMERY OF THE UTILITY MODEL

The embodiment of the utility model provides a battery box and battery device for guarantee the leakproofness of liquid cooling board and boundary beam junction, can also improve space utilization simultaneously.

In a first aspect, an embodiment of the present invention provides a battery box, including: the supporting plate is connected with the edge beam through a fastener;

a groove is formed in the surface, facing the supporting plate, of one side of the edge beam, a sealing strip is accommodated in the groove, and the sealing strip is in contact with the groove bottom of the groove and the supporting plate respectively; the sealing strip seals the joint between the supporting plate and the edge beam to form a first sealing layer;

sealant is arranged between the fastening piece and the groove to form a second sealing layer;

wherein, the recess with the shortest distance between the axis of fastener is first distance, first distance is 3mm to 20mm, the width of sealing strip with the product of first distance is 15mm ² To 260mm ² 。

So, the boundary beam is provided with the recess towards a side surface of layer board, has the sealing strip in the recess, the sealing strip respectively with tank bottom and layer board contact, can realize through the sealing strip that the first of boundary beam and layer board junction is sealed, the rethread sealing glue realizes that the second of boundary beam and layer board junction is sealed, through the sealed effect that improves battery box of twice. And, through the width to the sealing strip, the first distance between the axis of recess and fastener, and the setting of the product of the width of sealing strip and first distance, can improve the roughness of sealing strip and tank bottom contact, avoid the easy inefficacy that causes when the sealing strip width is too little, can also improve the compaction effect to the sealing strip simultaneously, cause harmful effects to the recess when avoiding the fastener assembly, can also avoid in addition because of the too wide space waste that causes with the first distance of sealing strip, thereby when improving the sealed effect of battery box, improve space utilization.

In a second aspect, an embodiment of the present invention provides a battery device, including: if the embodiment of the utility model provides an above-mentioned battery box and be located battery in the battery box.

So, the boundary beam is provided with the recess towards a side surface of layer board, has the sealing strip in the recess, the sealing strip respectively with tank bottom and layer board contact, can realize through the sealing strip that the first of boundary beam and layer board junction is sealed, the rethread sealing glue realizes that the second of boundary beam and layer board junction is sealed, through the sealed effect that improves battery box of twice. And, through the width to the sealing strip, the first distance between the axis of recess and fastener, and the setting of the product of the width of sealing strip and first distance, can improve the roughness of sealing strip and tank bottom contact, avoid the easy inefficacy that causes when sealing strip width is too little, can also improve the compaction effect to the sealing strip simultaneously, cause harmful effects to the recess when avoiding the fastener assembly, in addition can also avoid because of the too wide space waste that causes with the first distance of sealing strip is too big, thereby when improving the sealed effect of battery box, improve space utilization.

Drawings

Fig. 1 is a schematic view of a partial structure of a battery box provided in an embodiment of the present invention;

FIG. 2 is a cross-sectional view taken along the line X1-X2 in FIG. 1;

fig. 3 is a top view of an end cap surface provided in an embodiment of the present invention;

fig. 4 is a schematic structural diagram of another battery box provided in an embodiment of the present invention;

FIG. 5 is an enlarged partial view of FIG. 4 within solid line box 1;

fig. 6 is a schematic structural diagram of a battery device according to an embodiment of the present invention.

10-supporting plate, 20-edge beam, 21-groove, 30-sealing strip, 40-fastener, 41-end cap, 42-fastening column, 43-glue overflow groove, 50-sealing glue, 101-battery box body, 102-battery, b 1-groove bottom and m-frame.

Detailed Description

The following describes in detail a specific embodiment of a battery box and a battery device according to an embodiment of the present invention with reference to the drawings. It should be noted that the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

An embodiment of the utility model provides a battery box, as shown in fig. 1 and fig. 2, can include: the supporting plate 10 is connected with the edge beam 20 through a fastener 40; wherein, the supporting plate 10 can be but not limited to a heat exchange plate located at the bottom of the battery box body;

a side surface of the side sill 20 facing the pallet 10 (such as the lower surface of the side sill 20 shown in fig. 2) is provided with a groove 21, the groove 21 may be arranged along the extending direction (i.e., the F2 direction) of the side sill 20, a sealing strip 30 arranged along the extending direction (i.e., the F2 direction) of the groove 21 is arranged in the groove 21, and the sealing strip 30 is respectively in contact with the groove bottom b1 of the groove 21 and the pallet 10; the sealing strip 30 seals the joint between the supporting plate 10 and the edge beam 20 to form a first sealing layer;

a sealant 50 is arranged between the fastener 40 and the groove 21 to form a second sealing layer;

wherein, the width h0 of the sealing strip 30 is 3mm to 15mm, the shortest distance between the groove 21 and the central axis of the fastener 40 is a first distance h1, the first distance h1 is 3mm to 20mm, and the product of the width h0 of the sealing strip 30 and the first distance h1 is 15mm ² To 260mm ² 。

As shown in fig. 1 and 2, when the groove 21 extends in the F2 direction, the sealing tape 30 provided therein also extends in the F2 direction, so that the width of the sealing tape 30 can be understood as the length of the sealing tape 30 in the F1 direction.

So, the boundary beam is provided with the recess towards a side surface of layer board, has the sealing strip in the recess, the sealing strip respectively with tank bottom and layer board contact, can realize through the sealing strip that the first of boundary beam and layer board junction is sealed, the rethread sealing glue realizes that the second of boundary beam and layer board junction is sealed, through the sealed effect that improves battery box of twice.

And, through the width to the sealing strip, the first distance between the axis of recess and fastener, and the setting of the product of the width of sealing strip and first distance, can improve the roughness of sealing strip and tank bottom contact, avoid the easy inefficacy that causes when the sealing strip width is too little, can also improve the compaction effect to the sealing strip simultaneously, cause harmful effects to the recess when avoiding the fastener assembly, can also avoid in addition because of the too wide space waste that causes with the first distance of sealing strip, thereby when improving the sealed effect of battery box, improve space utilization.

That is, if the value of h0 is too large, that is, the width of the sealing strip is too large, the contact flatness between the sealing strip and the groove bottom will be deteriorated, which will further cause deterioration of sealing performance, and meanwhile, the assembly is not easy; moreover, the excessive width of the sealing strip can cause the waste of the sealing strip and increase the weight of the battery box body; if the value of h0 is too small, namely the width of the sealing strip is too small, although the contact flatness of the sealing strip and the groove bottom is good, the width of the sealing strip is small, the sealing effect is possibly poor, and the sealing strip is easy to lose efficacy;

if the sealing strip is arranged in the groove firstly during assembly, and then the supporting plate and the edge beam are connected and fixed by the fastening piece, the supporting plate and the edge beam can be extruded by the fastening piece, so that the sealing strip can be extruded, and the effect of sealing the joint is achieved;

if the value of h1 is too large, the distance between the groove and the fastener is relatively long, and the extrusion force on the sealing strip is reduced along with the increase of h1, so that the sealing strip is not compressed sufficiently due to insufficient extrusion, and sealing failure is easy to occur; in addition, the overlarge value of h1 also can cause the overlarge size of the boundary beam in the F1 direction, so that the overlarge size of the battery box body is caused, and the space waste is caused;

if the value of h1 is too small, the distance between the groove and the fastener is small, the groove and even the sealing strip can be adversely affected due to assembly tolerance when the fastener is assembled, and meanwhile, heat generated during assembly can be transferred into the groove, so that the sealing strip in the groove is deformed under the influence of the heat, and finally the sealing effect is poor;

therefore, through setting h0 and h1, the defect caused by too large or too small h0 and h1 can be avoided, namely, h0 and h1 are set to be proper sizes, so that the sealing effect can be improved, the space utilization rate can be improved, and the space waste is avoided.

In some embodiments, the first distance h1 is 8mm to 14mm.

So, can further avoid not enough to the compression of sealing strip, can also avoid causing the damage to recess and even sealing strip because of assembly tolerance when the assembly fastener, and then avoid causing destruction to sealed effect to improve sealed effect.

In some embodiments, the width h0 of the sealing strip is 5mm to 9mm.

Therefore, the contact flatness of the sealing strip and the groove bottom can be improved, the sealing effect can be improved, raw materials can be saved, and the reduction of the weight and the manufacturing cost of the battery box body is facilitated.

In some embodiments, the product of the width h0 of the sealing strip and the first distance h1 is 40mm ² To 126mm ² 。

In this way, the influence of the width of the weather strip and the first distance can be taken into consideration, so that the reliability of the battery case as a whole can be improved.

In some embodiments, as shown in fig. 2, the fastener 40 has a fastening post 42, and the shortest distance h2 between the groove 21 and the fastening post 42 is 5mm to 10mm.

Wherein the fastener may be, but is not limited to: studs, screws or bolts, etc.; when the fastener is a screw or a bolt, the end cap can be a screw cap, the fastening column can be a stud, and the screw cap and the stud can be designed to be integrally formed; when the fastener is a stud, the fastening column is the stud, and the end cap can be a nut which is not integrally formed with the stud.

Also, the fastener 40 may be located on a side of the recess 21 away from the interior of the battery case; with reference to fig. 2, the inside of the battery box body may be the left side of the boundary beam 20, so the fastening member 40 is disposed on the right side of the groove 21, the boundary beam 20 and the supporting plate 10 may be fixedly connected by the fastening member 40 on the outer side, the outer sealing of the joint may be realized by the second sealing layer, and the outer sealing of the joint may be realized by the first sealing layer, so that the connection is realized while the double sealing is realized, and the sealing effect of the joint is ensured.

So, through the setting to h2, can further consider the influence of the heat that produces when the assembly fastener to the sealing strip, cause the damage and sealed inefficacy to the sealing strip when avoiding the assembly to when guaranteeing normal assembly, improve sealed effect.

In some embodiments, as shown in fig. 2, the shortest distance h2 between the groove 21 and the fastening post 42 is 7mm to 8mm.

So, the heat that produces when can avoiding the assembly causes the damage and sealed inefficacy to the sealing strip more effectively to when further guaranteeing normal assembly, improve sealed effect.

In some embodiments, as shown in fig. 2, fastener 40 has an end cap 41, and the shortest distance h3 between groove 21 and end cap 41 is 3mm to 8mm.

So, through the setting to h3, can further consider the influence that assembly tolerance produced to structural strength, cause the stability of junction to reduce when avoiding the assembly to when guaranteeing normal assembly, improve the stability of connecting.

In some embodiments, as shown in FIG. 2, the shortest distance between the groove 21 and the end cap 41 is 5mm to 6.5mm.

So, can avoid assembly tolerance to cause the stability of junction to reduce more effectively to only in order to guarantee normal assembly, improve the stability of connecting.

In some embodiments, a gap exists between the sealant and the groove.

And when the supporting plate and the boundary beam are connected through the fastener, the sealant can be positioned on the periphery of the fastener.

So, can adopt sealed glue to seal fastener department at the fastener annex, realize the outside sealed, also realize the sealed of fastener position department to sealing strip through in the recess can realize inboard sealed, thereby can realize double seal, effectively improve the sealed effect of junction.

And, because of sealed glue generally has mobility, so when connecting because the extrusion of layer board and boundary beam can make sealed glue to stretch all around, because there is the clearance between sealed glue and the recess, so for sealed glue stretch provide the space, and then can avoid sealed glue and sealing strip to take place the contact, further avoid leading to the sealing strip inefficacy because of sealed glue takes place the contact with the sealing strip to can further improve the sealed effect of junction.

In some embodiments, if h4 is used to represent the distance between the sealant and the groove, the value of h4 may be set according to the fluidity of the sealant, the usage amount of the sealant, and other factors; for example, if the fluidity of the sealant is high and the usage amount is large, the value of h4 can be set to be larger so as to prevent the sealant from spreading into the groove and contacting with the sealing strip; if the mobility of sealed glue is lower, and the use amount is less, can be less with the value setting of h4 to avoid the waste in space, be favorable to saving space, and then reduce the size of battery box.

In some embodiments, as shown in FIG. 2, a sealant 50 is present between the side wall of the recess 21 facing the fastener 40 (the right side wall as viewed in the figures) and the sealing strip 30.

As shown in fig. 2, if a large amount of sealant 50 is applied between the edge beam 20 and the supporting plate 10 and the extrusion force to the sealant 50 is large, the sealant 50 may spread around and may spread into the groove 21, so that the sealant 50 is present in the groove 21, that is, the sealant 50 is present between the side wall of the groove 21 facing the fastening member 40 and the sealing strip 30.

So, the recess not only can be used for setting up the sealing strip, can also regard as the groove of overflowing glue to use, avoids sealed glue to spill over to other positions and cause harmful effects to other structures, and avoids causing the interference to the installation of other structures to improve the assembly ease of battery box.

Further, in some embodiments, as shown in FIG. 2, there is a gap between the sealant 50 and the weatherstrip 30.

Wherein, in fig. 2, the distance between the sealant 50 and the sealing tape 30 can be represented by h 5.

So, can avoid sealed glue and take place the contact with the sealing strip, further avoid leading to the sealing strip inefficacy because of sealed glue takes place the contact with the sealing strip to can further improve the sealed effect of junction.

In some embodiments, as shown in FIG. 2, the fastener 40 has an end cap 41, and the side of the end cap 41 facing the pallet 10 (i.e., the upper surface of the end cap 41) is provided with an overflow groove 43.

During the assembly process of the battery box body, firstly, the surface of the supporting plate and/or the boundary beam is coated with the sealant, then the sealing strip is arranged in the groove, the supporting plate and the boundary beam are spliced and fixed by the fastener, the sealant and the sealing strip are extruded during the installation process of the fastener, and the sealant can spread all around due to the flowability of the sealant;

when having the through-hole that is used for installing the fastener in the layer board, sealed glue can stretch to between through-hole and the fastener, then enters into the gluey groove of overflowing in the end cap to sealed glue overflows to other positions and causes harmful effects to other structures, and, also can seal the mounted position of fastener, can also be favorable to the fixing of fastener, thereby improve battery box's stability and reliability.

In some embodiments, as shown in fig. 2, when the fastener also has a fastening post 42, the fastening post 42 is connected with the end cap 41; moreover, as shown in fig. 3, the orthographic projection of the fastening post on the end cap 41 is shown as the solid coil 1, and the glue overflow groove 43 on the surface of the end cap 41 overlaps the solid coil 1, precisely, the glue overflow groove 43 is in the same boundary with the solid coil 1; therefore, the fastening column 42 and the glue overflow groove 43 are arranged next to each other, and the distance between the fastening column and the glue overflow groove is 0, so that when glue overflow occurs, the overflowed sealant can quickly flow into the glue overflow groove 43 to avoid overflowing to other positions; moreover, when the sealant 50 exists in the sealant overflowing groove 43, the fixation of the sealant 50 to the fastening piece and the effective sealing of the gap between the fastening column and the through hole in the supporting plate can be effectively improved.

In some embodiments, as shown in fig. 4 and 5, the battery box may include a frame m (only a part of the frame m is shown in the figures in order to see the sealing strip 30), and the frame m and the supporting plate 10 may form an accommodating space for disposing a battery (not shown in the figures) therein;

the frame m may be a hexagon (certainly, the frame is not limited to a hexagon, and the structure shown in fig. 4 is merely used as an example here), and the edge beam 20 may be any edge of the frame m;

moreover, each bottom surface of the frame m is connected with the supporting plate 10, and each side of the frame m is provided with a groove 21 on the side facing the supporting plate 10, so that the grooves 21 can be arranged around along the frame m, and the sealing strips 30 can also be arranged around (since the sealing strips are positioned in the grooves on the bottom surface of the frame m, only part of the sealing strips 30 can be seen in the figure, but this does not mean that the sealing strips 30 are only arranged at the positions which can be seen in the figure), thereby realizing effective sealing of the connection;

meanwhile, the fastening members 40 may be provided in plurality, and may also be distributed around the frame to achieve effective connection of the frame m and the pallet 10.

To clearly show the weather strip 30 and the groove 21, the structure inside the solid line frame 1 in fig. 4 is enlarged, and the enlarged structure is shown in fig. 5.

Combine specific embodiment below, it is right the embodiment of the utility model provides an above-mentioned battery box's sealed effect carries out the gas tightness test.

Before testing, the battery box is applied to a battery pack, and then the battery pack is tested.

1. The test mode is as follows:

and (3) inflating the battery pack, wherein the inflation pressure is 4.5KPa, the holding pressure time is 60s, the timing is started when the holding pressure is finished, and the pressure in the battery pack is tested when the timing reaches 60 s.

2. And (3) testing conditions:

the test temperature was 25 ℃ and the humidity was maintained at 20%; the battery pack needs to be kept still for not less than 2 hours in a test environment before testing; if the test is required to be repeated, the test time interval is not less than 50min; at the time of testing, there was no appreciable air flow around the battery pack.

3. And (3) testing results:

the test results are shown in table 1, where h0 represents the width of the seal, h1 represents the first distance between the groove and the central axis of the fastener, and P represents the amount of leakage.

TABLE 1

Serial number	h0(mm)	h1(mm)	h0×h1(mm 2 )	P/KPa
					Example 1	3	5	15	29
Example 2	9	5	45	18.7
					Example 3	15	5	75	14.9
Example 4	9	12	108	9.3
					Example 5	9	20	180	7.1
Example 6	15	10	150	7.0
					Example 7	15	16	240	6.2
Example 8	15	3	45	19.0
					Example 9	9	3	27	23
Example 10	13	20	260	5.1
					Example 11	6	10	60	19.1
Example 12	8	8	64	19.1
					Comparative example 1	3	3	9	42.3
Comparative example 2	14	20	280	34.6
					Comparative example 3	2	2	4	46.5

From the above table 1, the following conclusions can be drawn:

1. in examples 1 to 12, h0 was 3mm to 15mm, h1 was 3mm to 20mm, and h0. Times.h 1 was 15mm ² To 260mm ² The corresponding leakage amount is 5.1KPa to 29KPa; further, the smaller the value of h0 × h1, the larger the leakage amount, and the larger the value of h0 × h1, the smaller the leakage amount, so that the value of h0 × h1 is inversely correlated with the leakage amount.

The leakage amounts in examples 1 to 12 were small, and it was demonstrated that h0 was 3mm to 15mm, h1 was 3mm to 20mm, and h0 × h1 was 15mm ² To 260mm ² And meanwhile, the battery box body has better sealing performance and better sealing effect.

2. In comparative examples 1 to 3, the value of h0 Xh 1 was less than 15mm ² Or greater than 260mm ² The corresponding leakage amount is as high as 40KPa, so that the leakage amount is larger, the sealing effect of the battery box body is poor, and the sealing performance is poor; this can also be explained indirectly, and by setting the width of the seal strip and the first distance, the sealing effect of the battery case can be improved.

3. The value of h0 × h1 in comparative example 2 is large because both h0 and h1 are large, which results in a large size of the battery case without taking advantage of the improvement in space utilization.

And, at h0, 5mm to 9mm, h1 at 8mm to 14mm, h0 × h1 at 40mm ² To 126mm ² Again, the test was performed and the test results are shown in table 2, where h0 represents the width of the seal, h1 represents the first distance between the groove and the central axis of the fastener, and P represents the amount of leakage.

TABLE 2

From the above table 2, it can be found that:

5mm to 9mm at h0, 8mm to 14mm at h1, and 40mm at h0 × h1 ² To 126mm ² During the time, let out leakage quantity and can reduce to 5.0KPa to 13.5KPa, let out leakage quantity and can obtain further reducing, explain through further setting up h0 and h1, can effectively reduce let out leakage quantity, increase the leakproofness of battery box, improve sealed effect.

In some embodiments, the battery box may include, in addition to the above structure, other structures for implementing functions of the battery box, and may be specifically configured according to actual needs, which is not limited herein.

Based on same utility model design, the embodiment of the utility model provides a battery device, as shown in fig. 6, can include: the battery box 101 and the battery 102 located in the battery box 101 provided by the embodiment of the present invention.

In some embodiments, the number of the batteries 102 in the battery box 101 is not limited to that shown in fig. 6, and may be set to other numbers according to actual needs, and is not limited herein.

In some embodiments, the electrical connection mode of each battery may be: the series connection, the parallel connection or the combination of the series connection and the parallel connection can be specifically set according to actual needs, and is not limited herein.

In some embodiments, the battery device may be, but is not limited to being, a battery pack.

In some embodiments, the battery device may include, in addition to the battery box and the battery, other structures that may be used to implement the functions of the battery device, and is not limited herein.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (11)

1. A battery box, characterized in that includes: the supporting plate is connected with the edge beam through a fastener;

a groove is formed in the surface of one side, facing the supporting plate, of the edge beam, a sealing strip is accommodated in the groove, and the sealing strip is respectively contacted with the groove bottom of the groove and the supporting plate; the sealing strip seals the joint between the supporting plate and the edge beam to form a first sealing layer;

sealant is arranged between the fastening piece and the groove to form a second sealing layer;

wherein, the recess with the shortest distance between the axis of fastener is first distance, first distance is 3mm to 20mm, the width of sealing strip with the product of first distance is 15mm ² To 260mm ² 。

2. The battery case of claim 1, wherein the first distance is 8mm to 14mm.

3. The battery case of claim 1, wherein the product of the width of the seal strip and the first distance is 40mm ² To 126mm ² 。

4. The battery box of claim 1, wherein the fastener has a fastening post, and a shortest distance between the groove and the fastening post is 5mm to 10mm.

5. The battery case of claim 1 wherein the fastener has an end cap and the shortest distance between the groove and the end cap is 3mm to 8mm.

6. The battery case of claim 1, wherein a gap exists between the sealant and the groove.

7. The battery box of claim 1, wherein the sealant is present between the side wall of the groove facing the fastener and the sealing strip.

8. The battery case of claim 7 wherein a gap exists between the sealant and the seal strip.

9. The battery case of any one of claims 1 to 8, wherein the fastener has an end cap, and a glue overflow groove is formed on a side of the end cap facing the support plate.

10. The battery box of claim 9, wherein the fastener further has a fastening post connected to the end cap, an orthographic projection of the fastening post on the end cap overlaps the flash groove;

the sealant is arranged in the sealant overflow groove.

11. A battery device, comprising: the battery case of any one of claims 1-10, and a battery located within the battery case.

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