CN220491952U - Battery and battery head shell structure thereof - Google Patents

Abstract

The utility model discloses a battery and a head shell structure thereof, wherein the head shell structure is used for being installed at the head of a battery core module, the head shell structure mainly comprises a heat dissipation shell, the inner side of the heat dissipation shell can be connected with the battery core module, and a groove type water cooling area is arranged on the outer side of the heat dissipation shell, so that the heat dissipation shell can be rapidly cooled in a water cooling mode, and then the battery core tab and a main board can be rapidly cooled through the heat dissipation shell, and finally the purpose of cooling and radiating the battery head is achieved.

Description

Battery and battery head shell structure thereof

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery head shell structure and a battery with the same.

Background

The current power battery cells in the market release a large amount of heat under the condition of high-rate discharge or charge. If this heat is not removed in time, the durability of the battery is reduced, the service life of the battery is reduced, and even extreme cases such as fire explosion may occur. Therefore, the battery cell generally adopts an air cooling or water cooling mode to dissipate heat, wherein the water cooling heat dissipation efficiency is higher, and the battery cell is more suitable for application scenes of high-power quick charge and quick discharge.

Because the battery core cannot be charged under the high temperature condition, the battery core is required to be allowed to be charged after the temperature of the battery core is reduced to a certain condition, otherwise, the service life of the battery is seriously influenced. Therefore, under the condition of frequent high-rate charge and discharge, the discharged battery cell is quickly restored to the temperature range allowed by charge, the operation efficiency can be remarkably improved, the battery cell can be protected from high temperature, the battery cell is ensured to be in the normal working range, and the service life of the battery cell is prolonged. A common battery water cooling scheme is to soak the battery cells in water or to arrange liquid lines around the battery cells.

Because unmanned aerial vehicle power battery needs to consider the lightweight design, so often adopt the mode of soaking to dispel the heat to the electric core. However, since the plug, the main board, and the like of the battery cell cannot contact water, the water level of the soaked battery cell is usually lower than the positions of the plug and the main board, for example, two thirds of the height of the battery cell cannot be exceeded, which results in that heat of the tab and the main board and the vicinity thereof cannot be dissipated by a method of soaking the battery cell. And the high temperature of the tab and the main board position can influence the charge and discharge performance and the charge efficiency of the battery.

Therefore, how to solve the high temperature problem of the battery cell tab and the motherboard is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

In view of the above, the present utility model is directed to a battery and a head case structure thereof, which can solve the high temperature problem of the battery cell tab and the motherboard.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

a battery head shell structure for being mounted on the head of a battery cell module, the battery head shell structure comprising a heat dissipation shell;

the inner side of the heat dissipation shell is connected with the battery cell module;

the outside of the heat dissipation shell is provided with a groove type water cooling area.

Optionally, in the above battery head case structure, the groove-type water cooling area is provided with a water drain.

Optionally, in the above battery head case structure, a heat dissipation fin is disposed in the groove-type water cooling area.

Optionally, in the above battery head case structure, a plurality of the heat dissipation fins are arranged in the groove-type water cooling area side by side;

the bottom surfaces of the gaps between the adjacent radiating fins protrude upwards relative to the side edges of the bottom of the water outlet.

Optionally, in the above battery head case structure, the battery head case further includes an electrical connection terminal, and the electrical connection terminal and the drain opening are respectively disposed at two sides of the heat dissipation case.

Optionally, in the above battery head case structure, the heat dissipation case includes an outer case and an inner cover;

a heat dissipation area is arranged on the outer side of the inner cover, and the inner side of the inner cover is matched with a main board of the battery cell module;

the shell is positioned at the outer side of the inner cover and is provided with a through groove for exposing the heat dissipation area, and the through groove and the heat dissipation area form the groove type water cooling area;

and a first sealing structure is arranged around the groove-type water cooling area between the outer shell and the inner cover.

Optionally, in the above battery head casing structure, the first sealing structure includes a sealant or a first sealing ring.

Optionally, in the above battery head case structure, a separator is disposed at a top of the battery cell module, wherein:

the partition board is made of heat-conducting materials;

and/or the top surface of the partition plate is provided with an annular convex rib, and the inner side of the heat dissipation shell is provided with a limiting groove matched with the annular convex rib in a buckling mode.

Optionally, in the above battery head case structure, a second sealing structure is provided between the inner side of the heat dissipation case and the separator, wherein:

the second sealing structure is positioned on the radial outer side of the annular rib;

and/or the second sealing structure comprises a sealant or a second sealing ring.

A battery comprising a cell module, the head of which is provided with a battery head casing structure as described hereinabove.

Optionally, in the above battery, the heat dissipation case in the battery head case structure is connected with the battery cell module through a fastener.

According to the technical scheme, in the battery and the head shell structure thereof, as the battery cell tab and the main board (namely the PCBA) are both positioned near the head of the battery cell module and are closer to the heat dissipation shell, heat can be conducted to the heat dissipation shell when the temperature of the battery cell tab and the main board is higher (for example, when the battery cell is charged and discharged frequently at a large rate), and heat dissipation is realized through the heat dissipation shell. Moreover, when carrying cooling water to the recess type water-cooling district of heat dissipation casing, can realize the rapid cooling to heat dissipation casing through the water-cooling mode, then realize the rapid cooling to electric core tab and mainboard through heat dissipation casing, finally reach the purpose of cooling and radiating to the battery head.

Therefore, the battery and the head shell structure thereof can solve the problem of high-temperature heat dissipation of the battery core tab and the main board by directly carrying out water cooling on the head of the battery, can greatly improve the heat dissipation efficiency, and can carry out more frequent high-rate discharge and charge in a short time. And the battery core soaking water cooling method and the head shell water cooling heat dissipation method can be combined, so that the whole heat of the battery can be rapidly dissipated, the whole temperature is reduced, the battery can reach the charging condition more rapidly, and the frequency and the efficiency of cyclic charging and discharging are improved.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic exploded view of a battery according to a first embodiment of the present utility model.

Fig. 2 is a partial cross-sectional view of section A-A of fig. 1.

Fig. 3 is an isometric view of a battery according to a first embodiment of the utility model.

Fig. 4 is a top view of a battery according to a first embodiment of the present utility model.

Fig. 5 is a front view of a battery according to a first embodiment of the present utility model.

Fig. 6 is a right side view of a battery according to a first embodiment of the present utility model.

Wherein:

1-a heat dissipation shell, 100-a groove type water cooling area,

101-an outer shell, 102-a first sealing ring, 103-an inner cover,

111-through grooves, 112-water outlet,

131-heat dissipation fins, 132-gap bottom surface,

1121-a side edge of the bottom,

2-a second sealing ring, 3-an electric core module,

301-separator plates, 302-tabs,

4-electrical connection terminals.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

First embodiment

In a first embodiment of the utility model, a battery and a head case structure thereof are provided. The battery comprises a battery cell module and a head shell structure, wherein the battery head shell structure is arranged at the head part of the battery cell module.

Referring to fig. 1 to 6, the battery head casing structure includes a heat dissipation casing 1, wherein an inner side of the heat dissipation casing 1 can be in sealing connection with a battery cell module 3, and a groove type water cooling area 100 is arranged on an outer side of the heat dissipation casing 1.

It should be noted that, the groove-type water cooling area 100 herein refers to a concave structure disposed at the top of the heat dissipation housing 1, and the concave structure has at least a groove sidewall, so that cooling water can be limited in the water cooling area, and water flow scattering is avoided, and electrical interfaces of each position of the battery core are not affected when the battery head is cooled by water cooling.

In the battery and the head shell structure thereof provided by the utility model, because the battery cell tab 302 and the main board (namely PCBA) are both positioned near the head of the battery cell module 3 and are nearer to the heat dissipation shell 1, when the temperature of the battery cell tab 302 and the main board is higher (for example, when the battery cell is frequently charged and discharged in a large multiplying power), heat can be conducted to the heat dissipation shell 1, and heat dissipation is realized through the heat dissipation shell 1. Moreover, when the cooling water is conveyed to the groove-type water cooling area 100 of the heat dissipation shell 1, the heat dissipation shell 1 can be rapidly cooled in a water cooling mode, and then the battery cell tab 302 and the main board are rapidly cooled through the heat dissipation shell 1, so that the purpose of cooling and radiating the battery head is finally achieved.

Therefore, the battery head shell structure provided by the utility model can solve the problem of high-temperature heat dissipation of the battery core tab and the main board by directly carrying out water cooling on the battery head, can greatly improve the heat dissipation efficiency, and enables the battery to be discharged and charged with high multiplying power more frequently in a short time.

In the specific implementation, the battery core soaking water cooling method and the head shell water cooling heat dissipation method can be combined, so that the whole heat of the battery can be rapidly dissipated, the whole temperature is reduced, the battery can reach the charging condition more rapidly, and the frequency and the efficiency of cyclic charging and discharging are improved.

In a preferred embodiment, referring to fig. 1 and 4, the groove-type water cooling zone 100 is provided with a drain 112, and the cooling water in the groove-type water cooling zone 100 can be automatically drained after absorbing heat through the drain 112. Therefore, cooling water can be continuously conveyed to the groove-type water cooling area 100 in the water cooling process, automatic circulation of the cooling water is realized, and high heat dissipation efficiency is ensured. In practice, it should be noted that the drain 112 is located away from the electrical interface such as the plug to protect it from the splash water.

Further, heat sink fins 131 are disposed in the recessed water cooling area 100. For increasing the heat conduction area of the heat dissipation case 1 and improving the heat dissipation efficiency. For example, referring to fig. 3 and 4, a plurality of heat dissipation fins 131 are disposed in the groove-type water cooling area 100, and the plurality of heat dissipation fins 131 are arranged side by side. Preferably, the side openings of the gaps formed between the adjacent heat dissipation fins 131 are parallel to the water draining direction of the water draining port 112, so that the cooling water is conveniently guided to the position of the water draining port 112 and is smoothly drained.

Referring to fig. 5, in the embodiment, the bottom surfaces 132 of the gaps between the adjacent heat dissipation fins 131 protrude upward relative to the bottom side 1121 of the drain port 112, so as to ensure that the cooling water in the groove-type water cooling area 100 is discharged cleanly without water storage.

In specific implementation, the battery head shell structure provided by the embodiment of the utility model further comprises an electric connection terminal 4. Preferably, the electrical connection terminals 4 and the drain port 112 are disposed on both sides of the heat dissipation case 1, respectively, so that the electrical connection terminals 4 are located as far away from the drain port 112 as possible, thereby avoiding the influence of the drain water.

Referring to fig. 1 and 3, in a preferred embodiment, the heat dissipation case 1 includes an outer case 101 and an inner cover 103. Wherein:

the heat dissipation areas (namely the areas where the plurality of heat dissipation fins 131 are positioned) are arranged on the outer side of the inner cover 103, the inner side of the inner cover 103 is matched with the main board of the cell module 3, and is in sealing connection with the cell module 3, so that the heat conduction and waterproof effects on the main board can be achieved; ( It should be noted that "fitting" as used herein refers to a certain fit relationship between different components/devices, for example, a size fit, a structural fit, and a desired fit effect. In this context, it is specifically meant that the inner side of the inner cover 103 can completely cover the motherboard and does not interfere with the motherboard after the inner cover 103 and the cell module 3 are connected. )

The outer shell 101 is buckled on the outer side of the inner cover 103, and is provided with a through groove 111 for exposing the heat dissipation area, and the through groove 111 and the heat dissipation area form a groove type water cooling area 100;

a first sealing structure is arranged around the groove-type water cooling area 100 between the outer shell 101 and the inner cover 103 to realize the sealing waterproof function, namely, the sealing waterproof function is used for limiting cooling water in the groove-type water cooling area 100, so that water inflow in the battery is avoided.

In a specific implementation, the first sealing structure may be a sealant. Alternatively, as shown in fig. 1 and 6, the sealing between the outer case 101 and the inner cover 103 may be achieved by the first seal ring 102, and the fixed connection between the outer case 101 and the inner cover 103 may be achieved by a fastener such as a screw or a bolt.

In practice, referring to fig. 1 and 2, the top of the cell module 3 is provided with a spacer 301. The top surface of the partition 301 is provided with an annular convex rib 311, and the inner side surface of the heat dissipation shell 1 (i.e. the inner side surface of the inner cover 113) is provided with a limit groove buckled and matched with the annular convex rib 311, so that the positioning, connection and water resistance between the cell module 3 and the inner cover 103 are conveniently realized.

Specifically, the partition 301 is made of a heat conductive material, and may be metal or nonmetal. The cell tab 302 and the separator 301 are fixed by filling heat dissipation glue. The heat dissipation glue can fill gaps, improve waterproof capability, and simultaneously can uniformly conduct heat of the battery cell tab 302 to the partition 301, and then to the heat dissipation shell 1.

Specifically, the heat dissipation case 1 is combined with the partition plate by means of a fastener or a heat dissipation glue, heat is conducted from the partition plate 301 to the heat dissipation case 1 through the contact surface, and finally the heat is discharged to the outside through the heat dissipation fins 131 and the cooling water.

In particular, a second sealing structure is provided between the inner surface of the heat dissipation case 1 (i.e., the inner surface of the inner lid 113) and the partition 301. The second sealing structure is located radially outside the annular rib 311 and has the function of sealing and waterproofing.

In particular, the second sealing structure may be a sealant. Alternatively, as shown in fig. 1 and 6, the sealing between the inner cover 103 and the cell module 3 may be achieved by the second seal ring 2, and the fixed connection between the outer case 101 and the inner cover 103 may be achieved by a fastener such as a screw or a bolt. For example, referring to fig. 1, the outer case 101, the inner cover 103, and the partition 301 are provided with mounting holes for fixed connection by fasteners such as screws or bolts.

In specific implementation, after the battery is charged and discharged frequently at a high rate, both the battery cell module 3 (including the tab 302) and the main board are in a high-temperature state, and rapid cooling is required. At this time, the battery can be placed in cooling water, and the bottom and two thirds of the battery cells are soaked in the water for cooling; meanwhile, the battery head (including the battery core head and the heat dissipation shell 1) is located outside the water surface, and cooling water is conveyed to the groove type water cooling area 100, for example, water is sprayed to the groove type water cooling area 100 in a spraying mode, so that the battery head is cooled rapidly. However, the present utility model is not limited thereto, and in other embodiments, the cooling water may be supplied to the groove-type water cooling zone 100 through a water pipe, or the cooling water may be supplied to the groove-type water cooling zone 100 through any other means. The present utility model is not particularly limited in the manner of cooling water transportation.

In summary, the battery and the head shell structure thereof provided by the utility model are based on the fact that the battery plug is not waterproof, and electric wires led out by the battery plug, copper plates and other conductive objects can not directly contact water, so that a groove-type water cooling area 100 is divided at the top of the head shell structure (namely the top of the heat dissipation shell 1) for water cooling and heat dissipation. Meanwhile, the water cooling area 100 is of a groove type structure, and the inner side of the heat dissipation shell 1 is in sealing connection with the battery cell module 3, so that cooling water cannot leak to other places outside the area where the water cooling area 100 is located, and risks of short circuit, corrosion and the like of an electrical interface (such as a plug and a copper bar) outside the battery due to contact with water are avoided.

Second embodiment

A second embodiment of the present utility model provides a battery and a head case structure thereof, which differ from the first embodiment only in that:

the heat dissipation shell 1 is of an integral heat conduction structure, can be hollow or solid, and is hermetically connected with the battery cell module 3 at the bottom surface (i.e. the inner side surface) and provided with a groove-type water cooling area 100 at the top surface (i.e. the outer side surface). The main board is positioned between the battery cell module 3 and the heat dissipation shell 1, and can realize water resistance and heat conduction through the heat dissipation shell 1.

The battery provided with the heat dissipation shell 1 with the integral structure can cool the head of the battery in a water cooling mode as in the first specific embodiment.

Third embodiment

A third embodiment of the present utility model provides a battery and a head case structure thereof, which differ from the first embodiment described above only in that:

after cooling water enters the groove type water cooling area 100, the cooling water can reside in the groove area, the water outlet is opened after the cooling water is cooled to a certain extent in a heat transfer mode, or the cooling water is discharged in a dumping mode, the water adding and discharging actions are repeated in a circulating mode, and the cooling and heat dissipation of the shell 1, the battery head, the inner polar lugs of the battery head and the main board can be realized.

In this case, the groove-type water cooling area 100 may be a closed groove without a drain port, and may be drained by placing the battery obliquely or manually by pouring or sucking. Although the water flow circulation efficiency is low, the device can be applied to some possible embodiments, and the rapid cooling of the battery head is realized by a water cooling mode.

Finally, it is further noted that relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.

In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A battery head casing structure for mounting on the head of a battery cell module (3), characterized in that the battery head casing structure comprises a heat dissipation casing (1);

the inner side of the heat dissipation shell (1) is used for being connected with the battery cell module (3);

a groove type water cooling area (100) is arranged on the outer side of the heat dissipation shell (1); the heat dissipation shell (1) comprises a shell (101) and an inner cover (103), wherein the shell (101) is positioned at the outer side of the inner cover (103), and the inner side of the inner cover (103) is matched with a main board of the battery cell module (3); and radiating fins (131) are arranged in the groove-type water cooling area (100).

2. The battery head casing structure according to claim 1, wherein the recessed water cooling zone (100) is provided with a drain opening (112).

3. The battery head casing structure according to claim 2, wherein a plurality of the heat radiation fins (131) are arranged side by side in the groove-type water cooling area (100);

the bottom surfaces (132) of gaps between the adjacent heat radiating fins (131) protrude upward relative to the bottom side edge (1121) of the water outlet (112).

4. The battery head casing structure according to claim 2, further comprising an electrical connection terminal (4), the electrical connection terminal (4) and the drain opening (112) being provided on both sides of the heat dissipation case (1), respectively.

5. The battery head casing structure according to claim 1, wherein a heat dissipation area is provided on the outer side of the inner cover (103);

the shell is provided with a through groove (111) for exposing the heat dissipation area, and the through groove (111) and the heat dissipation area form the groove type water cooling area (100);

a first sealing structure is arranged around the groove type water cooling area (100) between the outer shell (101) and the inner cover (103).

6. The battery head casing structure according to claim 5, wherein the first sealing structure comprises a sealant or a first sealing ring (102).

7. The battery head casing structure according to claim 1, wherein the top of the cell module (3) is provided with a separator (301), wherein:

the partition board (301) is made of heat-conducting materials;

and/or the top surface of the partition board (301) is provided with an annular convex rib (311), and the inner side of the heat dissipation shell (1) is provided with a limit groove which is matched with the annular convex rib (311) in a buckling mode.

8. The battery head casing structure according to claim 7, wherein a second sealing structure is provided between the inner side of the heat dissipation casing (1) and the separator (301), wherein:

the second sealing structure is positioned radially outside the annular rib (311);

and/or the second sealing structure comprises a sealant or a second sealing ring (2).

9. A battery comprising a cell module (3), characterized in that the head of the cell module (3) is provided with a battery head casing structure according to any one of claims 1 to 8.

10. The battery according to claim 9, characterized in that the heat dissipation case (1) in the battery head case structure is connected with the battery cell module (3) by a fastener.