CN214227080U - Glue injection structure of battery pack and battery pack - Google Patents
Glue injection structure of battery pack and battery pack Download PDFInfo
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- CN214227080U CN214227080U CN202023306330.3U CN202023306330U CN214227080U CN 214227080 U CN214227080 U CN 214227080U CN 202023306330 U CN202023306330 U CN 202023306330U CN 214227080 U CN214227080 U CN 214227080U
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- glue injection
- battery pack
- battery
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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Abstract
The utility model belongs to the technical field of battery packs, in particular to a glue injection structure of a battery pack and the battery pack, wherein the battery pack comprises a battery core bracket; the battery cell support is provided with an accommodating cavity for installing a battery cell; the injection structure comprises an injection hole and an exhaust hole which are communicated with the containing cavity; the glue injection hole is communicated with the accommodating cavity through the top of the battery cell support, and the exhaust hole is formed in the highest position of the accommodating cavity. By adopting the technical scheme, the glue can be directly injected into the accommodating cavity through the glue injection hole, the glue flows in a flow channel formed by the gaps among the cylindrical electric cores under the action of pressure, and the glue fills the gaps among the electric cores from bottom to top; after the colloid fills the clearance between the electric core completely, the colloid can spill over from the exhaust hole, adopts the mode of top injecting glue, makes things convenient for the rubber tube to connect and inserts the convenience, improves work efficiency. The design of exhaust hole can avoid the inside production bubble of colloid and guarantee that the colloid fills the clearance between the electric core completely.
Description
Technical Field
The utility model relates to a battery package technical field, concretely relates to injecting glue structure and battery package of battery package.
Background
The colloid is poured into the existing battery pack, and the colloid fills gaps between the battery cores, so that the battery pack can play roles in insulation, moisture prevention, vibration reduction, explosion prevention and the like. However, the existing glue injection structure only comprises glue injection holes, in the glue injection process, gas in the battery pack cannot be completely removed, bubbles exist after the glue is solidified, in addition, the glue cannot be ensured to completely fill gaps among the battery cores in the prior art, and the glue injection effect is poor.
Therefore, it is urgently needed to develop a glue injection structure of a battery pack to ensure the glue injection effect.
Disclosure of Invention
To the problem, the utility model provides a injecting glue structure of battery package, the colloid solidifies the back bubble-free production, and can guarantee that the colloid fills the clearance between the electric core completely.
The scheme of the utility model is as follows:
the glue injection structure of the battery pack comprises a battery core bracket; the battery cell support is provided with an accommodating cavity for installing a battery cell;
the glue injection structure comprises a glue injection hole and an exhaust hole which are communicated with the accommodating cavity; the colloid is followed the top of electricity core support is through the injecting glue hole is pressed in hold the chamber, the exhaust hole is seted up hold the highest position in chamber.
Preferably, the exhaust hole is formed in the top of the battery cell support or the highest position of the side wall of the battery cell support.
Preferably, the battery pack further comprises a bus assembly arranged at the top of the battery cell support; the glue injection hole penetrates through the confluence assembly and the top of the battery cell support.
Preferably, the bus assembly comprises an upper bus bar, an insulating layer and a lower bus bar which are arranged in sequence from top to bottom; the glue injection hole comprises a first through hole formed in the upper layer busbar, a second through hole formed in the insulating layer, a third through hole formed in the lower layer busbar and a fourth through hole formed in the top of the battery cell support.
Preferably, the aperture of the second through hole is smaller than the aperture of the first through hole and/or the third through hole.
Preferably, the aperture of the second through hole is the same as that of the third through hole and is smaller than that of the first through hole.
Preferably, the battery cell support is formed by buckling an upper support and a lower support; the upper bracket comprises a base plate and a side wall arranged on the base plate in a surrounding manner; the fourth through hole is formed in the base plate of the upper support, and the exhaust hole is formed in the side wall of the upper support.
Preferably, the substrate of the upper bracket is provided with positioning grooves distributed in a honeycomb shape; the glue injection holes are located between the three adjacent positioning grooves.
Preferably, a clamping hole matched with the battery cell is formed in the substrate of the upper support; and an assembly gap is reserved between the clamping hole and the battery core.
Preferably, the glue injection hole is correspondingly formed in the middle of the battery module.
A battery pack comprises the glue injection structure of the battery pack.
By adopting the technical scheme of the utility model, the colloid can be directly injected into the accommodating cavity through the colloid injection hole, and flows in the flow channel formed by the gap between the cylindrical electric cores under the action of pressure, and the colloid fills the gap between the electric cores from bottom to top; after the colloid fills the clearance between the electric core completely, the colloid can spill over from the exhaust hole, adopts the mode of top injecting glue, makes things convenient for the rubber tube to connect and inserts the convenience, improves work efficiency. The design of exhaust hole can avoid the inside production bubble of colloid, and guarantees that the colloid fills the clearance between the electric core completely.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of the upper bracket;
FIG. 3 is a schematic structural view of the back side of the upper bracket;
FIG. 4 is a schematic structural view of the lower bracket;
FIG. 5 is a schematic view of a bus bar;
FIG. 6 is a schematic view of a partial cross-section of the glue injection hole;
FIG. 7 is a partial sectional view of another embodiment of a hole for injecting glue
In the figure, a bus assembly 1, an upper bus bar 11, an insulating layer 12, a lower bus bar 13, an upper bracket 2, a substrate 21, a clamping hole 211, a positioning groove 212, a side wall 22, an exhaust hole 221, a lower bracket 3, a positioning hole 31, a partition plate 32, a glue injection hole 4, a first through hole 41, a second through hole 42, a third through hole 43, a fourth through hole 44 and a water cooling plate 5.
Detailed Description
The following is further detailed by the specific embodiments:
as shown in fig. 1, the present embodiment discloses a battery pack, which includes a battery module, a cell bracket for fixing the battery module, and a bus bar assembly 1 installed on the cell bracket and a water cooling plate 5 below the battery module.
In this embodiment, the battery module includes a plurality of rows of cylindrical battery cells, and the two adjacent rows of cylindrical battery cells are distributed in a staggered manner, it can be understood that, in the existing battery pack, the cylindrical battery cells mainly have two distribution forms, one of which is that the centers of the cylindrical battery cells are on the same straight line along the transverse direction and the longitudinal direction; the other form is that the centers of two adjacent rows of cylindrical battery cells are staggered, the center of one row of cylindrical battery cells is arranged between the other row of battery cells, and the battery cells are distributed in a honeycomb shape. The staggered distribution in this embodiment is the case where the cells are distributed in a honeycomb shape.
As shown in fig. 2 to 4, in this embodiment, the battery cell support is formed by fastening an upper support 2 and a lower support 3. The upper bracket 2 and the lower bracket 3 are buckled to form a containing cavity for installing the battery core. The upper bracket 2 comprises a base plate 21 and a side wall 22 arranged on the base plate 21 in a surrounding manner; the lower bracket 3 is in a frame shape matched with the side wall 22. The base plate 21 of the upper bracket 2 is protruded inwards to form positioning grooves 212 distributed in a honeycomb shape, and the lower bracket 3 comprises positioning holes 31 matched with the positioning grooves 212. In the present embodiment, the water-cooling plate 5 covers the bottom of the lower frame 3, and the water-cooling plate 5 has a cooling fluid therein to cool the battery module.
In this embodiment, upper bracket 2 and lower carriage 3 are all injection moulding alone, and upper bracket 2 and lower carriage 3 pass through ultrasonic bonding, make whole electric core support form integral type structure. During the electric core support can be worn to adorn from locating hole 31 on lower carriage 3 to the cylinder electric core, simple to operate, the location is accurate.
For convenient installation, the bus bar assembly 1 in the embodiment is installed on the substrate 21 of the upper bracket 2, and the bus bar assembly 1 comprises an upper bus bar 11, an insulating layer 12 and a lower bus bar 13 which are arranged in sequence from top to bottom; the upper layer busbar 11 and the lower layer busbar 13 are respectively connected with the positive electrode and the negative electrode of the battery cell. The insulating layer 12 serves to insulate the upper bus bar 11 and the lower bus bar 13.
In this embodiment, still seted up injecting glue hole 4 on the battery package, injecting glue hole 4 runs through the base plate 21 of the subassembly 1 that converges and upper bracket 2 to with hold the chamber intercommunication. Can directly pour into the colloid into toward holding the chamber through annotating gluey hole 4, the colloid flows in the runner that the clearance between the cylinder electricity core formed under the pressure effect, with the clearance packing between the electricity core to wrap up electric core, make every electric core independently inside a space. The colloid is preferably heat-insulating and fireproof pouring sealant, so that the thermal runaway phenomenon of the battery cell is prevented from diffusing, and the whole combustion and even explosion of the battery pack are prevented. The design of top injecting glue is adopted, so that the rubber tube can be conveniently inserted and connected, and the working efficiency is improved.
In the glue injection process, air in the accommodating cavity cannot be discharged, and the glue injection effect can be influenced. Therefore, in order to exhaust the air in the accommodating cavity, the exhaust hole 221 is further opened at the highest position of the side wall 22 of the upper bracket 2, and the exhaust hole 221 in this embodiment is opened at the position of the side wall 22 close to the base plate 21.
The design of exhaust hole 221 can make the battery module exhaust effect better at the injecting glue in-process. In actual operation, because the colloid fills the clearance between the electric core from bottom to top, after the colloid fills the clearance between the electric core completely, the colloid can spill over from exhaust hole 221, when the colloid spills over exhaust hole 221, can stop the injecting glue, guarantees that the colloid fills the clearance between the electric core completely.
In some embodiments, the vent holes 221 are optionally opened on the top of the cell holder, so that the vent holes 221 are formed on the base plate 21 of the upper holder 2, and when the colloid overflows from the vent holes 221 on the base plate 21, the colloid can be ensured to completely fill the gaps between the cells.
As shown in fig. 5 and fig. 6, in the present embodiment, the first portion of the glue injection hole 4 is a first through hole 41 opened on the upper layer bus bar 11; the second part of the glue injection hole 4 is a second through hole 42 formed in the insulating layer 12; the third part of the glue injection hole 4 is a third through hole 43 formed in the lower bus bar 13, and the fourth part of the glue injection hole 4 is a fourth through hole 44 formed in the substrate of the upper bracket 2. The first through hole 41, the second through hole 42, the third through hole 43, and the fourth through hole 44 are all coaxial.
In the prior art, the aperture sizes of the whole first through hole 41 to the whole fourth through hole 44 are the same, the creepage distance between the upper layer bus bar 11 and the lower layer bus bar 13 is the height distance of the side wall of the second through hole 42, the creepage distance is short, and the insulation effect is poor. In the present embodiment, the diameter of the second through hole 42 in the insulating layer 12 is smaller than that of the first through hole 41 and/or the third through hole 43, the insulating layer 12 forms a stepped hole in cooperation with the first through hole 41 and/or the third through hole 43, and the portion of the stepped surface formed by the insulating layer 12 can increase the creepage distance between the upper bus bar 11 and the lower bus bar 13.
In the present embodiment, the aperture of the second through hole 42 is the same as that of the third through hole 43 and is smaller than that of the first through hole 41. The insulating layer 12 covers a portion of the first through hole 41 below the upper bus bar 11, and completely exposes the third through hole 43 on the lower bus bar 13. The creepage distance between the upper layer bus bar 11 and the lower layer bus bar 13 is the height distance d1 of the side wall of the second through hole 42 plus the distance d2 from the side wall of the second through hole 42 to the side wall of the first through hole 41. The upper opening of the glue injection hole 4 in the embodiment is large, which is beneficial to the inflow of glue.
In some embodiments, the aperture of the first through hole 41 is larger than that of the third through hole 43, the aperture of the second through hole 42 is smaller than that of the first through hole 41 but larger than that of the third through hole 43, and the creepage distance between the upper layer busbar 11 and the lower layer busbar 13 is the height distance d1 of the sidewall of the second through hole 42 plus the distance d2 from the sidewall of the second through hole 42 to the sidewall of the first through hole 41.
In some embodiments, the first through hole 41 has the same diameter as the second through hole 42 and is smaller than the third through hole 43. The insulating layer 12 completely exposes the first through hole 41 on the upper layer bus bar 11 and covers a portion of the third through hole 43 above the lower layer bus bar 13. Because the structure that the glue injection hole 4 is small at the top and big at the bottom is not convenient for injecting glue, the practical production process is not optimized.
As shown in fig. 7, in some embodiments, the first through hole 41 of the upper bus bar 11 has the same aperture as the third through hole 43 of the lower bus bar 13, and the second through hole 42 of the insulating layer 12 has a smaller aperture than the first through hole 41 and the second through hole 42. The insulating layer 12 in this embodiment covers part of the first through hole 41 and the third through hole 43, and the creepage distance between the upper layer bus bar 11 and the lower layer bus bar 13 is the height distance d1 of the side wall of the second through hole 42 plus twice the distance d2 from the side wall of the second through hole 42 to the side wall of the first through hole 41.
In this embodiment, one cell holder fixes two battery modules, and the upper holder 2 and the lower holder 3 have the partition plates 32 thereon to separate the two battery modules. Because cylinder electricity core is honeycomb-shaped distribution, the clearance that is located between three adjacent cylinder electricity core is the biggest, and injecting glue hole 4 in this embodiment is located between adjacent three constant head tank 212, and corresponds the middle part setting of every battery module. The glue injection holes 4 are formed in the middle of each battery module, so that the glue can be guaranteed to uniformly flow to the periphery of each battery module; since the gap between three adjacent cells is the largest, the portion of the base plate 21 between the three positioning grooves 212 has a sufficient area to satisfy the size of the glue injection hole 4. The exhaust hole in this embodiment is correspondingly seted up on four corners of every battery module, and the exhaust hole is located the position of the longest route that the colloid flows, guarantees that the colloid can fill the gap between the electric core completely.
In this embodiment, the card hole 211 has been seted up to the tip that corresponds cylindrical battery cell on the base plate 21 of upper bracket 2, has an assembly gap between the tip of cylindrical battery cell and the card hole 211, and this assembly gap can cooperate exhaust hole 221 to exhaust jointly and overflow and glue, avoids because of the flow resistance of exhaust hole 221 department is great, leads to the colloid directly to spill over from injecting glue hole 4.
In the present embodiment, the fourth through hole 44 is an inscribed circle formed between the three positioning grooves 212. In an actual production process, the size of the fourth through hole 44 on the substrate of the upper bracket 2 is the same as the size of the through hole with the smallest diameter among the first through hole 41, the second through hole 42, and the third through hole 43, and can also be designed as required.
The invention is not limited solely to that described in the specification and the embodiments, and additional advantages and modifications will readily occur to those skilled in the art, and it is not intended to be limited to the specific details, representative apparatus, and illustrative examples shown and described herein, without departing from the spirit and scope of the general concept as defined by the appended claims and their equivalents.
Claims (10)
1. A glue injection structure of a battery pack comprises a battery core bracket; the battery cell support is provided with an accommodating cavity for installing a battery cell;
the method is characterized in that:
the glue injection structure comprises a glue injection hole and an exhaust hole which are communicated with the accommodating cavity; the colloid is followed the top of electricity core support is through the injecting glue hole is pressed in hold the chamber, the exhaust hole is seted up hold the highest position in chamber.
2. The glue injection structure of the battery pack according to claim 1, wherein: the exhaust hole is formed in the top of the battery cell support or the highest position of the side wall of the battery cell support.
3. The glue injection structure of the battery pack according to claim 2, wherein: the battery pack also comprises a confluence assembly arranged at the top of the battery cell support; the glue injection hole penetrates through the confluence assembly and the top of the battery cell support.
4. The glue injection structure of the battery pack according to claim 3, wherein: the bus assembly comprises an upper bus bar, an insulating layer and a lower bus bar which are sequentially arranged from top to bottom;
the glue injection hole comprises a first through hole formed in the upper layer busbar, a second through hole formed in the insulating layer, a third through hole formed in the lower layer busbar and a fourth through hole formed in the top of the battery cell support.
5. The glue injection structure of the battery pack according to claim 4, wherein: the aperture of the second through hole is smaller than the aperture of the first through hole and/or the third through hole.
6. The glue injection structure of the battery pack according to claim 5, wherein: the battery cell support is formed by buckling an upper support and a lower support; the upper bracket comprises a base plate and a side wall arranged on the base plate in a surrounding manner; the fourth through hole is formed in the base plate of the upper support, and the exhaust hole is formed in the side wall of the upper support.
7. The glue injection structure of the battery pack according to claim 6, wherein: the substrate of the upper bracket is provided with positioning grooves distributed in a honeycomb shape; the glue injection holes are located between the three adjacent positioning grooves.
8. The glue injection structure of the battery pack according to claim 7, wherein: a clamping hole matched with the battery cell is formed in the substrate of the upper support; and an assembly gap is reserved between the clamping hole and the battery core.
9. The glue injection structure of the battery pack according to any one of claims 1 to 8, wherein: the glue injection hole is correspondingly formed in the middle of the battery module.
10. A battery pack, comprising: a glue injection structure comprising the battery pack according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023306330.3U CN214227080U (en) | 2020-12-31 | 2020-12-31 | Glue injection structure of battery pack and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023306330.3U CN214227080U (en) | 2020-12-31 | 2020-12-31 | Glue injection structure of battery pack and battery pack |
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| CN214227080U true CN214227080U (en) | 2021-09-17 |
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| CN202023306330.3U Active CN214227080U (en) | 2020-12-31 | 2020-12-31 | Glue injection structure of battery pack and battery pack |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114122625A (en) * | 2021-11-29 | 2022-03-01 | 蜂巢能源科技有限公司 | Connecting device of battery module and battery module |
| CN114497679A (en) * | 2022-01-28 | 2022-05-13 | 欣旺达电动汽车电池有限公司 | Battery pack assembling process and battery pack |
-
2020
- 2020-12-31 CN CN202023306330.3U patent/CN214227080U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114122625A (en) * | 2021-11-29 | 2022-03-01 | 蜂巢能源科技有限公司 | Connecting device of battery module and battery module |
| CN114497679A (en) * | 2022-01-28 | 2022-05-13 | 欣旺达电动汽车电池有限公司 | Battery pack assembling process and battery pack |
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