CN220934231U - Multifunctional shell, battery and battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries and discloses a multifunctional shell, a battery and a battery pack, wherein the multifunctional shell comprises a shell, a battery cavity and a cooling cavity are formed in the shell, one side of the battery cavity adjacent to the cooling cavity is shared by walls, two ends of the shell are arranged in an opening manner, and a plurality of partition boards are arranged in the cooling cavity; the utility model has the beneficial effects that: through built-in cooling chamber and set up the baffle in the cooling chamber, form cooling channel, increase heat radiating area effectively promotes square shell battery heat dispersion, and the inside baffle that sets up on the cooling chamber cooperation simultaneously can also realize supporting, thermal-insulated, forced air cooling and buffer function four unification. Both sides of the common wall of the battery cavity and the cooling cavity are provided with arc-shaped walls sunken to the cooling cavity, so that the expansion of the winding core is not limited by corners, the expansion is more uniform, and the cycle life of the battery is effectively prolonged.

Description

Multifunctional shell, battery and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a multifunctional shell, a battery and a battery pack.

Background

The charge and discharge processes of the battery are a series of complex chemical reaction processes, all chemical reaction processes are accompanied by heat transfer, the support, heat insulation, heat dissipation and buffering of the battery are particularly important, and once the battery is out of control, the explosion of the whole automobile can be possibly caused, and even the casualties of people can be caused.

In the existing battery pack structure, the liquid cooling system does not increase energy, but increases the weight of the battery pack, reduces the energy density of the battery pack, meanwhile, the liquid cooling mode is adopted, the volume utilization rate is low when the batteries are grouped, and the heat insulation, heat dissipation and buffering effects are poor.

Disclosure of utility model

The utility model mainly aims to provide a multifunctional shell, a battery and a battery pack, and aims to solve the technical problems of low volume utilization rate, poor heat insulation, heat dissipation and buffering effects in the battery pack in the prior art.

In order to achieve the above object, a first aspect of the present utility model provides a multifunctional housing, which comprises a housing, wherein a battery cavity and a cooling cavity are formed in the housing, one side of the housing adjacent to the battery cavity and one side of the cooling cavity are shared, two ends of the housing are provided with openings, and two ends of the battery cavity and two ends of the cooling cavity are respectively communicated with the openings at two ends of the corresponding housing.

Further, the battery cavity and the cooling cavity are approximately rectangular cavities, wherein the battery cavity and the cooling cavity are shared by walls, and arc-shaped walls which are sunken towards the cooling cavity are arranged on two sides perpendicular to the opening.

Further, a plurality of partition boards are arranged in the cooling cavity, a cavity is formed between the partition boards and the inner wall of the cooling cavity, and the partition boards in the cooling cavity are distributed in a staggered mode at intervals.

Further, the partition plate is a straight plate and is obliquely arranged relative to the large surface of the shell.

Further, the partition is provided along the length direction of the large surface of the housing.

Further, the length of the partition plate is the same as the length of the cooling chamber.

Further, the thickness of the cooling cavity is 6% -16% of the thickness of the shell.

Further, an explosion-proof valve is arranged on the shell.

Further, the shell is formed by extrusion of profiles.

Further, the shell is made of metal aluminum.

The second aspect of the present utility model provides a battery, including the multifunctional casing of any one of the above, a winding core, a negative electrode top cover assembly and a positive electrode top cover assembly, wherein the winding core is disposed in a battery cavity of the casing, the negative electrode top cover assembly and the positive electrode top cover assembly are fixedly connected with two ends of the battery cavity, and the negative electrode top cover assembly and the positive electrode top cover assembly are electrically connected with the winding core.

Further, the connection mode among the negative pole top cover component, the positive pole top cover component and the battery cavity is laser welding.

The third aspect of the utility model provides a battery pack, which comprises a plurality of batteries which are sequentially stacked, wherein the positive electrodes and the negative electrodes of the plurality of batteries are alternately arranged, and at least one cooling cavity is arranged between every two battery cavities.

The beneficial effects are that:

According to the multifunctional shell, the battery cavity and the cooling cavity are formed in the shell, and the cooling cavity is formed in the cooling channel and is attached to the battery cavity through the arrangement of the common wall on the adjacent side of the battery cavity and the cooling cavity, so that when the battery cavity heats, the battery cavity can be cooled through the cooling cavity, and the heat dissipation performance of the square shell battery is effectively improved. Meanwhile, the cooling cavity is matched with the partition board arranged inside, and four functions of supporting, heat insulation, air cooling and buffering can be realized. Both sides of the common wall of the battery cavity and the cooling cavity are provided with arc-shaped walls sunken to the cooling cavity, so that the expansion of the winding core is not limited by corners, the expansion is more uniform, and the cycle life of the battery is effectively prolonged.

Drawings

FIG. 1 is a schematic view of a multifunctional shell according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of the open end of the multi-functional housing according to an embodiment of the present utility model;

fig. 3 is an exploded view of a battery according to an embodiment of the present utility model;

fig. 4 is a schematic view of a battery according to an embodiment of the present utility model;

Fig. 5 is a schematic view illustrating a structure in which a plurality of batteries are stacked in a battery pack according to an embodiment of the present utility model;

fig. 6 is a process flow diagram of a processing process of the multifunctional shell according to an embodiment of the utility model.

Wherein:

100. A housing; 110. a battery cavity; 111. an arc-shaped wall; 112. a first sidewall; 120. a cooling chamber; 121. a partition plate; 130. an explosion-proof valve; 200. a positive cap assembly; 300. a winding core; 400. and a negative cap assembly.

The achievement of the objects, functional features and advantages of the present utility model will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element 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 utility model. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more of the described features. In the description of the present utility model, the meaning of "a plurality" is two or more, unless specifically defined otherwise.

In the description of the present utility model, 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; the connection may be mechanical connection, direct connection or indirect connection through an intermediate medium, and may be internal connection of two elements or interaction relationship of two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

Referring to fig. 1 to 2, a multifunctional housing is provided in an embodiment of the present utility model, including a housing 100, a battery cavity 110 and a cooling cavity 120 are provided in the housing 100, and one side of the battery cavity 110 and one side of the cooling cavity 120 adjacent to each other are shared, two ends of the housing 100 are provided with openings, and two ends of the battery cavity 110 and two ends of the cooling cavity 120 are respectively communicated with the openings at two ends of the corresponding housing.

In this embodiment, the battery cavity 110 and the cooling cavity 120 are formed inside the housing 100, and the adjacent sides of the battery cavity 110 and the cooling cavity 120 are commonly provided, so that when the battery cavity 110 generates heat, the cooling cavity 120 can radiate heat from the battery cavity 120. The common wall of the battery cavity 110 and the cooling cavity 120 is as described above with respect to the first side wall 112 in fig. 1.

Referring to fig. 2, in one embodiment, the battery cavity 110 and the cooling cavity 120 are approximately rectangular cavities, wherein the common wall of the battery cavity 110 and the cooling cavity 120 is provided with arc walls 111 recessed toward the cooling cavity perpendicular to both sides of the opening.

In this embodiment, the battery cavity 110 and the cooling cavity 120 are configured as approximately rectangular cavities, that is, the cavities have large and small surfaces, and the large surfaces of the battery cavity 110 and the cooling cavity 120 are configured to be co-walled, so that the battery cavity 110 can be cooled and radiated to the greatest extent. Specifically, the cooling cavity 120 completely covers the large face of the approximately rectangular cavity. Further, the approximately rectangular cavity is described because the above-described first side wall 112 is not a straight plate, but is provided with an arc-shaped wall 111 recessed toward the cooling cavity at the side corners contacting both facets of the case 100, resulting in that the battery cavity 110 and the cooling cavity 120 are not standard rectangular cavities. Referring to fig. 2 and 5, the arc-shaped wall 111 is recessed toward the cooling chamber, resulting in the middle of the first sidewall 112 being convex toward the battery chamber 110, and the arc-shaped wall 111 forms a buffer of force. When the winding core 300 inside the battery expands in the use process, the outer shell 100 deforms under the action of the expansion force, the structure of the cooling cavity 120 is affected, the middle of the first side wall 112 of the cooling cavity 120 bulges towards one side of the cooling cavity 120, at this time, stress is concentrated at the corner where the first side wall 112 is connected with two facets, and because the arc-shaped walls 111 are arranged on two sides of the first side wall 112, the winding core 300 can not be restrained by the corner 111 when expanding, the expansion is more uniform, and the cycle life of the battery is effectively prolonged.

In one embodiment, the number of the cooling cavities 120 is two, and the two cooling cavities 120 are respectively located at two sides of the battery cavity 110 and are co-walled with two large sides of the battery cavity 110.

In this embodiment, the cooling cavities 120 are disposed on two sides of the battery cavity 110, so that two sides of the battery cavity 110 dissipate heat simultaneously, and the heat dissipation efficiency of the battery cavity 110 is further increased.

In one embodiment, a plurality of partitions 121 are disposed inside the cooling cavity 120, a cavity is formed between the partitions 121 and the inner wall of the cooling cavity 120, and the partitions 121 inside the cooling cavity 120 are distributed in a staggered manner with a mutual interval.

In this embodiment, a cooling channel is formed by adopting a mode of internally arranging the cooling cavity 120 and arranging the partition plate 121 in the cooling cavity 120, so that the heat dissipation area is increased, the heat dissipation performance of the square-shell battery is effectively improved, and simultaneously, the cooling cavity 120 is matched with the partition plate 121 arranged inside, so that four functions of supporting, heat insulation, air cooling and buffering can be realized. The specific shape of the cavity can be a semi-cylinder, a polygonal prism, a straight plate, etc.

Referring to fig. 1 or 2, in a specific embodiment, the partition 121 is a straight plate, and is disposed obliquely with respect to the large surface of the housing.

The spacers in this embodiment are straight plates, arranged parallel to each other, or arranged at an angle of 30-60 to each other. The straight plate is inclined with respect to the large surface of the housing 100, so that the force generated when the winding core 300 expands can be effectively buffered, and the cycle life of the battery can be improved. The angle at which the straight plate is disposed obliquely to the large face of the housing 100 is typically between 30 deg. -60 deg..

In one embodiment, the spacer 121 is disposed along the length of the large face of the housing 100.

In this embodiment, a plurality of partitions 121 are provided to partition the interior of the cooling chamber 120 into a plurality of cooling passages. The provision of the spacer 121 increases the surface area, provides more contact surface, and allows for easier conduction of heat, thereby improving heat dissipation efficiency, while providing structural support.

In one embodiment, the length of the partition 121 is the same as the length of the cooling cavity 120.

In this embodiment, the length of the partition 121 is the same as the length of the cooling cavity 120, so that the stress is uniform when the winding core 300 inside the battery cavity 110 expands, and the cooling cavity 120 can be fully cooled.

In one embodiment, the cooling cavity 120 has a thickness of 6% -16% of the thickness of the housing 100.

Such a design of the cooling cavity 120 in the present embodiment occupies a small volume of the housing 100, and can maximally realize heat dissipation. The thickness of the housing 100 generally refers to a thickness perpendicular to the large surface of the housing 100.

Referring to fig. 1, in one embodiment, an explosion proof valve 130 is provided on the housing 100.

In this embodiment, the explosion-proof valve 130 is a weak area on the casing 100, when thermal runaway occurs, the explosion-proof valve 130 will open to release pressure when the pressure reaches a certain value, so as to prevent explosion of the battery.

In one embodiment, the housing 100 is profile extrusion.

In one embodiment, the material of the housing 100 is metallic aluminum.

The embodiment adopts aluminum profile extrusion molding, and has the advantages of simple process, rapid molding and effective reduction of manufacturing cost, unlike the traditional stretch molding.

Referring to fig. 3 and 4, a battery according to an embodiment of the present utility model includes any one of the above multi-functional cases, a winding core 300, a negative electrode cap assembly 400, and a positive electrode cap assembly 200, the winding core 300 is disposed in the battery cavity 110 of the case 100, the negative electrode cap assembly 400, the positive electrode cap assembly 200 are fixedly connected to both ends of the battery cavity 110, and the negative electrode cap assembly 400 and the positive electrode cap assembly 200 are electrically connected to the winding core 300.

The cooling cavity 120 in this embodiment can support, insulate and dissipate heat from the adjacent winding core 300, and at the same time, the cooling cavity 120 serves as a buffer when the battery cavity 110 expands. The volume utilization rate of the battery group is effectively improved.

In one embodiment, the connection between the negative cap assembly 400, the positive cap assembly 200, and the battery cavity 110 is laser welding.

The laser welding adopted in the embodiment has the advantages of high precision, no contact, small heat affected zone, high welding speed and the like.

Referring to fig. 5, in an embodiment of the present utility model, a battery pack is provided, which includes a plurality of batteries stacked in sequence, wherein the positive and negative electrodes of the plurality of batteries are alternately arranged, and a cooling cavity 120 is disposed between every two battery cavities 110.

The square shell battery that this embodiment provided is integrated in the battery package box, need not to set up aerogel and bubble cotton etc. between square shell battery and the square shell battery, and cooling chamber 120 can realize supporting, thermal-insulated, heat dissipation and the four unification of buffer function, effectively improves battery package group volume utilization ratio, is provided with a cooling chamber 120 at least between battery and the battery, both can play the radiating effect of cooling, can also play simultaneously and support, buffering and thermal-insulated effect.

Referring to fig. 6, a processing technology of a multifunctional shell is provided in this embodiment, where the processing technology is as follows:

s1, heating an aluminum profile;

S2, extruding and forming the heated aluminum profile by adopting a die;

S3, cutting the extruded aluminum profile according to the preset length to obtain the multifunctional shell.

In this embodiment, the multifunctional shell adopts aluminium alloy extrusion integrated into one piece, and processing technology flow is simple, and the shaping is fast, reduces manufacturing cost, and integrated into one piece's product generally has higher structural strength and stability, because there is not equipment seam and tie point, has reduced not hard up, fragile and cracked risk.

In one embodiment, before the extrusion step S2, the method includes:

s11, preheating the die.

In this embodiment, the mold is preheated, so that the temperature of the material used can be increased to melt or soften the material, the fluidity of the material is enhanced, and cold streaks and defects are avoided.

In one embodiment, before the step S3 of cutting the extruded aluminum profile according to the preset length, the method includes:

and S31, quenching the extruded profile.

In the embodiment, the extruded profile is subjected to quenching treatment, so that the material can be rapidly cooled and form a solid solution in a solid state, the hardness of the material is remarkably increased, and the tensile strength, the yield strength and the compressive strength of the quenched material are also remarkably increased due to the improvement of the hardness; the hardness and the strength are improved, the deformation and the abrasion in the cutting process can be effectively resisted, and the cutting performance and the durability are improved.

In one embodiment, after the step S31 of quenching the extruded profile, the method includes:

s32, stretching and straightening the extruded aluminum profile.

In the embodiment, the aluminum profile after extrusion molding is subjected to stretching and straightening treatment, so that the aluminum profile which is bent in the processing process can be corrected, and the qualification rate of finished products is improved.

The foregoing description is only of the preferred embodiments of the present utility model and is not intended to limit the scope of the utility model, and all equivalent structures or equivalent processes using the descriptions and drawings of the present utility model or directly or indirectly applied to other related technical fields are included in the scope of the utility model.

Claims (13)

1. The utility model provides a multifunctional shell, its characterized in that includes the shell, battery chamber and cooling chamber have been seted up to the shell inside, just battery chamber with the cooling chamber is adjacent one side is shared the wall, the both ends of shell are the opening setting, battery chamber with the both ends of cooling chamber respectively with the opening intercommunication at corresponding shell both ends.

2. The multifunctional housing of claim 1, wherein the battery cavity and the cooling cavity are approximately rectangular cavities, wherein the battery cavity and the cooling cavity are co-walled, and arc-shaped walls recessed toward the cooling cavity are arranged perpendicular to both sides of the opening.

3. The multifunctional shell according to claim 2, wherein a plurality of partition plates are arranged in the cooling cavity, a cavity is formed between the partition plates and the inner wall of the cooling cavity, and the partition plates in the cooling cavity are distributed in a staggered mode at intervals.

4. A multi-functional housing according to claim 3, wherein the partition is a straight plate, which is inclined with respect to the large surface of the casing.

5. A multi-functional housing according to claim 3 or 4, wherein the partition is disposed along the length of the large face of the outer shell.

6. The multi-purpose housing of claim 5, wherein the length of the partition is the same as the length of the cooling cavity.

7. The multi-function housing of claim 1, wherein the cooling cavity thickness is 6% -16% of the housing thickness.

8. The multifunctional shell of claim 7, wherein an explosion-proof valve is provided on the housing.

9. The multi-purpose housing of claim 8, wherein the outer shell is profile extrusion.

10. The multifunctional shell of claim 9, wherein the material of the outer shell is metallic aluminum.

11. A battery, characterized by comprising the multifunctional shell, a winding core, a negative top cover component and a positive top cover component according to any one of claims 1-10, wherein the winding core is arranged in a battery cavity of the shell, the negative top cover component and the positive top cover component are fixedly connected with two ends of the battery cavity, and the negative top cover component and the positive top cover component are electrically connected with the winding core.

12. The battery of claim 11, wherein the connection between the negative cap assembly, the positive cap assembly, and the battery cavity is laser welding.

13. A battery pack, characterized by comprising a plurality of cells according to any one of claims 11-12, which are stacked in sequence, wherein the positive and negative poles of the plurality of cells are alternately arranged, and at least one cooling cavity is arranged between every two cell cavities.