CN220821719U - Battery monomer and battery pack with same - Google Patents

Abstract

The utility model discloses a battery monomer and a battery pack with the same, wherein the battery monomer comprises the following components: a housing body defining a die cavity; the bottom coaming is arranged on the lower side of the shell body and connected with the shell body, and a cavity is defined between the bottom coaming and the lower side surface of the shell body in a matched mode. According to the battery cell, the arrangement space can be provided by arranging the bottom surrounding plate, and the cavity defined by the bottom surrounding plate and the lower side surface of the shell main body in a matched manner, so that at least part of structures of functional units capable of realizing the effects of cooling, heating, heat insulation or shock absorption of the battery cell can be integrated on the battery cell, the structure of a battery pack is simplified, the design and production difficulty of the battery pack are reduced, the production efficiency is improved, and the production cost is reduced.

Description

Battery monomer and battery pack with same

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery monomer and a battery pack with the same.

Background

The power battery is a core component of a new energy automobile, the battery cell is a key component and a basic unit which form the power battery, and in order to meet the safety and reliability in the working process of the power battery, a plurality of functional units are arranged on the power battery to assist the normal working of the battery cell, for example, in order to avoid the overhigh temperature in the working process of the battery cell, a liquid cooling plate capable of cooling the battery cell is arranged; in order to raise the temperature of the battery cell and improve the working efficiency of the battery cell in a low-temperature environment, a heating module capable of heating the battery cell is arranged; in order to prevent heat generated by the battery cell from being conducted to other elements to cause abnormal temperature of the other elements, a heat-insulating piece capable of insulating heat is arranged; in order to maintain the shock-absorbing member, etc. that electric core stability set up in electric core course of working, in the correlation technique, power battery structure is comparatively complicated, leads to production efficiency lower, manufacturing cost is higher.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. The utility model is based on the object of providing a battery cell which has a higher integration.

The utility model also provides a battery pack with the battery cell.

The battery cell according to the first aspect of the present utility model includes: a housing body defining a die cavity; the bottom coaming is arranged on the lower side of the shell body and connected with the shell body, and a cavity is defined between the bottom coaming and the lower side surface of the shell body in a matched mode.

According to the battery cell of the first aspect of the utility model, the arrangement space can be provided by arranging the bottom surrounding plate, and the cavity defined by the bottom surrounding plate and the lower side surface of the shell main body in a matched manner, so that at least part of structures of functional units capable of realizing the effects of cooling, heating, heat insulation or shock absorption of the battery cell can be integrated on the battery cell, thereby simplifying the structure of the battery pack, reducing the manufacturing difficulty of the battery pack, further improving the production efficiency and reducing the production cost.

According to some embodiments of the utility model, the cavity is a heat exchange cavity for circulating a heat exchange medium, or the cavity is filled with a heat insulating member, a heating member or a buffer member.

According to some embodiments of the utility model, the housing body comprises: the bottom plate portion and two curb plate portions, bottom plate portion level sets up, two curb plate portion vertical extension and lower extreme respectively with bottom plate portion links to each other at width direction both ends, the bottom bounding wall is connected bottom plate portion's downside and with bottom plate portion cooperation defines the cavity.

According to some embodiments of the utility model, the bottom panel portion, the side panel portion, and the bottom wall panel are integrally formed.

According to some embodiments of the utility model, the housing body further comprises: the top plate is connected to the top ends of the two side plate parts, the two side plate parts are connected to the two ends of the bottom plate part and the two ends of the side plate part in the length direction, and the top plate and the end plate part are welded with the bottom plate part and the side plate part.

According to some embodiments of the utility model, the bottom wall comprises: the support plate comprises a support plate part and two connecting plate parts, wherein the support plate part is horizontally arranged, the two connecting plate parts are connected with two side edges of the support plate part in the width direction and extend upwards, each connecting plate part comprises a first plate section, a second plate section and a third plate section, the first plate section is connected with the support plate part and extends upwards vertically, one end of the second plate section is connected with the upper end of the first plate section, the other end of the second plate section extends towards the other connecting plate part, and the third plate section is connected with the other end of the second plate section and extends upwards vertically to be connected with the shell main body.

The battery pack according to the second aspect of the present utility model includes: the battery unit comprises a box body and a plurality of battery units according to the first aspect of the utility model, wherein the battery units are arranged in the box body.

According to the battery pack of the second aspect of the utility model, by arranging the battery cells according to the first aspect of the utility model, the structure of the battery pack can be simplified, and the manufacturing difficulty of the battery pack can be reduced, so that the production efficiency is improved, and the production cost is reduced.

According to some embodiments of the utility model, the box comprises a supporting beam, a mounting cavity is formed in the supporting beam, a through groove penetrating through the upper side surface of the supporting beam and communicated with the mounting cavity is formed in the supporting beam, the bottom coaming penetrates through the through groove to be matched in the mounting cavity, and the battery unit is in sealing connection with the periphery of the through groove.

According to some embodiments of the utility model, the mounting cavity is open at both ends in the length direction of the support beam, the cavity is communicated with the mounting cavity, and the through groove penetrates at least one end of the support beam in the length direction of the support beam, or the through groove is spaced from the ends of both ends of the support beam in the length direction.

According to some embodiments of the utility model, the two side walls of the cavity on the two sides in the width direction of the bottom coaming are outwards protruded to form limiting protrusions, limiting grooves are formed in the supporting beam, the limiting protrusions and the limiting grooves extend along the length direction of the bottom coaming, and the limiting protrusions are matched in the limiting grooves.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

Fig. 1 is a schematic view of a battery pack according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the battery pack shown in FIG. 1 without a seal;

fig. 3 is a left side view of the battery pack shown in fig. 2 without a seal;

Fig. 4 is a schematic view of the battery cell shown in fig. 2;

FIG. 5 is a schematic view of the floor portion, side panel portions and bottom wall panel shown in FIG. 4;

FIG. 6 is a left side view of the bottom panel portion, side panel portions and bottom wall panel shown in FIG. 5;

FIG. 7 is a schematic view of the top plate and end plate portions shown in FIG. 4;

FIG. 8 is a schematic view of the support beam shown in FIG. 2;

FIG. 9 is a left side view of the support beam shown in FIG. 8;

FIG. 10 is a schematic view of a support beam according to another embodiment of the utility model;

fig. 11 is a left side view of the support beam shown in fig. 10.

Reference numerals:

1000. A battery pack;

100. a battery cell;

10. A case main body; 11. a die cavity; 12. a bottom plate portion; 13. a side plate portion; 14. a top plate; 15. an end plate portion;

20. A bottom coaming; 21. a cavity; 22. a limit protrusion; 23. a support plate portion; 24. a connection plate portion; 241. a first plate segment; 242. a second plate segment; 243. a third plate segment;

200. A support beam; 210. a mounting cavity; 220. a through groove; 230. a limit groove;

300. And a seal.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative and intended to explain the present utility model and should not be construed as limiting the utility model.

A battery cell 100 according to an embodiment of the first aspect of the present utility model is described below with reference to fig. 1 to 11.

As shown in fig. 4 to 7, a battery cell 100 according to an embodiment of the first aspect of the present utility model includes: a shell body 10 and a bottom closure 20.

Specifically, the case body 10 defines the electric core cavity 11, and the bottom wall plate 20 is provided on the lower side of the case body 10 and is connected to the case body 10, and the bottom wall plate 20 and the lower side surface of the case body 10 cooperatively define the cavity 21. The battery cell cavity 11 is used for installing a battery cell structure for realizing the charge and discharge functions of the battery cell 100.

In this embodiment, by providing the bottom cover plate 20, the cavity 21 defined by the bottom cover plate 20 and the lower surface of the case main body 10 can provide an arrangement space, for example, at least part of the structures of the functional units such as the liquid cooling plate, the heating module, the heat insulating member or the buffer module can be integrated on the battery unit 100, so that the number of parts in the battery pack 1000 can be reduced, the structure of the battery pack 1000 can be simplified, the operation steps can be reduced, the operation difficulty can be reduced in the production process, and the shape of the cavity 21 can be adjusted in the product design process, so that the cavity 21 meets more product design requirements, and the difficulty in designing and producing the battery pack 1000 can be reduced.

According to the battery cell 100 of the first embodiment of the present utility model, the structure of the battery pack 1000 can be simplified, and the difficulty in designing and producing the battery pack 1000 can be reduced, thereby improving the production efficiency and reducing the production cost.

In some embodiments of the utility model, the cavity 21 is a heat exchange cavity for circulating a heat exchange medium, or the cavity 21 is filled with a heat insulating member, a heating member, or a buffer member.

When the cavity 21 is a heat exchange cavity for flowing a heat exchange medium, the integration of the liquid cooling plate on the battery cell 100 can be realized, wherein the heat exchange medium can be gas or liquid. The heat exchange medium exchanges heat with the cell structure in the cell cavity 11 through the shell main body 10 when flowing in the cavity 21, so that the heat exchange efficiency is higher, the cooling effect on the battery cell 100 can be improved, the temperature of the battery cell 100 can be kept stable, and the service life of the battery cell 100 can be prolonged.

When the cavity 21 is filled with the heat insulating material, for example, the heat insulating material may be aerogel, basalt, etc., the heat insulating material may reduce heat exchange between the battery cell 100 and the components below the battery cell 100, thereby improving reliability of the battery pack 1000 during operation.

When the cavity 21 is filled with a heating element, for example, the heating element may be a material such as a thermistor material, a carbon fiber heating film or a thermopile, it is understood that when the temperature of the battery cell 100 is low, the working efficiency of the battery cell 100 is low, and the heating element may heat the battery cell 100 when the temperature of the battery cell 100 is low, thereby improving the working efficiency of the battery cell 100.

When the cavity 21 is filled with the buffer member, for example, the buffer member may be a buffer anti-collision material such as foam, and the buffer member may absorb the vibration on the battery cell 100, so as to improve the stability of the battery cell 100 during operation.

In some embodiments of the present utility model, the case body 10 and the bottom chassis 20 are aluminum material pieces, which are environmentally friendly, and when functional units such as a liquid cooling plate, a heating module, a heat insulating member, or a buffer module are integrated into the cavity 21, non-environmentally friendly materials required for installing the functional units, such as adhesive glue required for bonding the liquid cooling plate, are avoided, thereby improving the environmental protection level of the battery cell 100 and reducing environmental protection approval procedures of the battery pack 1000.

In some embodiments of the present utility model, as shown in fig. 5 and 6, the case body 10 includes: the bottom plate portion 12 and two side plate portions 13, the bottom plate portion 12 being disposed horizontally, the two side plate portions 13 extending vertically and having lower ends connected to both ends of the bottom plate portion 12 in the width direction, respectively, and a bottom wall 20 connected to the lower side of the bottom plate portion 12 and defining a cavity 21 in cooperation with the bottom plate portion 12. From this, the structure of shell main part 10 and end bounding wall 20 is comparatively simple to can reduce the degree of difficulty when producing, further promote production efficiency, at the in-process that produces the design, can change the data such as the size and the relative angle of bottom plate portion 12, curb plate portion 13 and end bounding wall 20, satisfy more product design demands, thereby reduce the product design degree of difficulty.

In some embodiments of the present utility model, the bottom panel portion 12, the side panel portion 13, and the bottom wall panel 20 are integrally formed. Therefore, the number of parts in assembly can be reduced, and the bottom plate portion 12, the side plate portion 13 and the bottom wall plate 20 can be assembled together in assembly, so that the assembly difficulty is reduced, and the assembly efficiency is improved. Wherein, preferably, the bottom plate portion 12, the side plate portion 13 and the bottom wall plate 20 are formed by an extrusion process, the degree of automation of the extrusion process is high and the precision of the produced product is high, thereby further improving the production efficiency and the quality of the product.

In some embodiments of the present utility model, as shown in fig. 5 and 7, the case body 10 further includes: a top plate 14 and two end plate portions 15, the top plate 14 being connected to the tips of the two side plate portions 13, the two end plate portions 15 being connected to both ends of the bottom plate portion 12 and the side plate portions 13 in the longitudinal direction, wherein the top plate 14 and the end plate portions 15 are welded to the bottom plate portion 12 and the side plate portions 13. Therefore, the cover of the battery cell cavity 11 can be realized, and the contact between the battery cell structure and other elements can be avoided in the working process of the battery cell 100, so that the battery cell 100 can work normally. Meanwhile, the welding connection is simple in operation and reliable in connection, the production efficiency can be further improved, and the reliability of connection with the side plate part 13 and the end plate part 15 and the side plate part 13 is improved.

In the production process, the top plate 14 and the two end plate portions 15 may be welded together and then welded to the bottom plate portion 12 and the side plate portion 13, or the top plate 14 and the two end plate portions 15 may be welded to the side plate portion 13 and the bottom plate portion 12, respectively, so as to meet more production requirements.

In some embodiments of the present utility model, as shown in fig. 6, the bottom wall 20 includes: the support plate portion 23 and two connection plate portions 24 are horizontally provided, and the two connection plate portions 24 are connected to both side edges of the support plate portion 23 in the width direction and extend upward, whereby the support plate portion 23, the connection plate portion 24, and the case main body 10 can cooperatively define the cavity 21.

The connection plate portion 24 includes a first plate segment 241, a second plate segment 242, and a third plate segment 243, the first plate segment 241 being connected to the support plate portion 23 and extending vertically upward, one end of the second plate segment 242 being connected to the upper end of the first plate segment 241 and the other end extending toward the other connection plate portion 24, and the third plate segment 243 being connected to the other end of the second plate segment 242 and extending vertically upward to be connected to the case main body 10. In this way, the interval between the two third plate sections 243 located at the upper side is smaller than the interval between the two first plate sections 241 located at the lower side, i.e., the lower side of the bottom chassis 20 is wider, whereby the supporting strength of the bottom chassis 20 can be improved, and the contact area of the battery cell 100 and the battery pack 1000 can be improved after the battery cell 100 is assembled to the battery pack 1000, thereby improving the stability of the battery cell 100.

In the process of product design, parameters such as the size, the shape or the relative angle of the support plate part 23, the first plate segment 241, the second plate segment 242 and the third plate segment 243 can be adjusted, so that more product design requirements are met, and the product design difficulty is reduced.

A battery pack 1000 according to an embodiment of the second aspect of the present utility model is described below with reference to fig. 1 to 11.

The battery pack 1000 according to the embodiment of the second aspect of the present utility model includes: the battery cell 100 is disposed in the case body.

According to the battery pack 1000 of the second embodiment of the present utility model, by providing the above-described battery cell 100 according to the first embodiment of the present utility model, the structure of the battery pack 1000 can be simplified, and the manufacturing difficulty of the battery pack 1000 can be reduced, thereby improving the production efficiency and reducing the production cost.

In some embodiments of the present utility model, as shown in fig. 1, 2, 3, 8, 9, 10 and 11, the case includes a support beam 200 having a mounting cavity 210 therein, a through groove 220 penetrating an upper surface of the support beam 200 and communicating with the mounting cavity 210 is formed on the support beam 200, a bottom cover plate 20 is fitted into the mounting cavity 210 through the through groove 220, and the battery cell 100 is hermetically connected to a peripheral edge of the through groove 220. Therefore, the assembly of the battery monomer 100 on the box body can be realized, wherein the contact area of the battery monomer 100 and the box body can be increased through the cooperation of the bottom coaming 20 and the mounting cavity 210, the stability of the battery monomer 100 on the box body and the reliability of the connection of the battery monomer 100 and the box body are improved, and the probability that a medium in the mounting cavity 210 escapes from a gap between the battery monomer 100 and the through groove 220 can be reduced through the peripheral edge sealing connection of the battery monomer 100 and the through groove 220, so that the reliability of the battery pack 1000 in the working process is improved.

In some embodiments of the present utility model, as shown in fig. 1, the battery pack 1000 further includes: the sealing member 300, the sealing member 300 locates between the circumference of the battery cell 100 and the through slot 220, the sealing member 300 is connected with the battery cell 100 and the supporting beam 200 through the sealant, in this way, the sealing of the circumference of the battery cell 100 and the through slot 220 can be realized, and the reliability of the connection of the battery cell 100 and the supporting beam 200 can be improved.

In some embodiments of the present utility model, as shown in fig. 1, 8, 9, 10 and 11, in the length direction of the support beam 200, the two ends of the installation cavity 210 are opened, the cavity 21 is communicated with the installation cavity 210, thereby a medium channel through which a medium passes can be formed in the cavity 21, and when a heat exchange medium flows in the cavity 21, the heat exchange medium can normally enter and exit in the installation cavity 210 and the cavity 21, so that the heat exchange medium can take away heat generated in the working process of the battery cell 100, thereby realizing the cooling of the battery cell 100 and improving the cooling effect.

The through groove 220 penetrates at least one end of the support beam 200 in the length direction of the support beam 200, or the through groove 220 is spaced apart from the end edges of both ends of the support beam 200 in the length direction.

When the through groove 220 penetrates at least one end of the support beam 200 along the length direction of the support beam 200, an operator can extend the end of the bottom coaming 20 penetrated by the support beam 200 into the through groove 220 in the assembly process, so that the bottom coaming 20 is matched with the mounting cavity 210, and therefore, the assembly difficulty can be further reduced, and the assembly efficiency is improved.

When the through slots 220 are spaced apart from the end edges of the both ends of the support beam 200 in the length direction, i.e., the beam body of the support beam 200 surrounds the circumference of the through slots 220, during assembly, an operator inserts the bottom closure plate 20 into the through slots 220 to engage the bottom closure plate 20 with the mounting cavity 210, whereby the end edges of the both ends of the support beam 200 in the length direction can restrict the relative displacement of the battery cells 100 and the support beam 200 in the length direction of the support beam 200, thereby improving the structural stability of the battery pack 1000.

In some embodiments of the present utility model, as shown in fig. 2, 3, 8, 9, 10 and 11, the side walls of the cavity 21 on both sides in the width direction of the bottom chassis 20 are outwardly protruded to form the limit protrusions 22, the limit grooves 230 are formed in the support beam 200, the limit protrusions 22 and the limit grooves 230 extend in the length direction of the bottom chassis 20, and the limit protrusions 22 are fitted into the limit grooves 230. That is, the bottom coaming 20 is matched with the mounting cavity 210 through the matching of the limiting protrusion 22 and the limiting groove 230 in the through groove 220, the matching operation of the limiting protrusion 22 and the limiting groove 230 is simple and the connection is reliable, thereby further improving the assembly efficiency and the connection reliability of the battery cell 100 and the supporting beam 200. Wherein, form spacing protruding 22 on the end coaming 20 can increase the volume of cavity 21 to the arrangement of the functional unit in cavity 21 is convenient for, and can hold more medium in the cavity 21, thereby promotes the effect of functional unit.

In some embodiments of the present utility model, the surface of the case body 10 is coated with an insulating spacer, so that after a plurality of battery cells 100 are assembled into a case, the insulating spacer insulates between the case bodies 10, thereby allowing the battery pack 1000 to operate normally, and the insulating spacer reduces the abrasion of the surface of the battery cells 100 caused by the friction between the battery cells 100, thereby improving the reliability of the battery pack 1000 during operation. Wherein, preferably, the insulating spacer is an insulating spacer film, and the insulating spacer film is easy to operate when the surface of the shell main body 10 is coated, and the thickness of the insulating spacer film is smaller, thereby improving the production efficiency, saving the arrangement space of the battery cells 100, and making the battery pack 1000 more compact in structure.

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", "axial", "radial", "circumferential", 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 being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore 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 such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; the device can be mechanically connected, electrically connected and communicated; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the 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 description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present utility model. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A battery cell, comprising:

a housing body defining a die cavity;

The bottom coaming is arranged on the lower side of the shell body and connected with the shell body, and a cavity is defined between the bottom coaming and the lower side surface of the shell body in a matched mode.

2. The battery cell according to claim 1, wherein the cavity is a heat exchange cavity for circulating a heat exchange medium, or the cavity is filled with a heat insulating member, a heating member, or a buffer member.

3. The battery cell of claim 1, wherein the case body comprises: the bottom plate portion and two curb plate portions, bottom plate portion level sets up, two curb plate portion vertical extension and lower extreme respectively with bottom plate portion links to each other at width direction both ends, the bottom bounding wall is connected bottom plate portion's downside and with bottom plate portion cooperation defines the cavity.

4. The battery cell of claim 3, wherein the bottom plate portion, the side plate portion, and the bottom plate are integrally formed.

5. The battery cell of claim 3, wherein the housing body further comprises: the top plate is connected to the top ends of the two side plate parts, the two side plate parts are connected to the two ends of the bottom plate part and the two ends of the side plate part in the length direction, and the top plate and the end plate part are welded with the bottom plate part and the side plate part.

6. The battery cell of claim 1, wherein the bottom wall plate comprises: the support plate part is horizontally arranged, the two connecting plate parts are connected with the edges of the two sides of the support plate part in the width direction and extend upwards,

The connecting plate portion comprises a first plate section, a second plate section and a third plate section, the first plate section is connected with the supporting plate portion and extends upwards vertically, one end of the second plate section is connected with the upper end of the first plate section, the other end of the second plate section extends towards the other connecting plate portion, and the third plate section is connected with the other end of the second plate section and extends upwards vertically to be connected with the shell main body.

7. A battery pack, comprising: a case and a plurality of battery cells according to any one of claims 1-6, the battery cells being disposed within the case.

8. The battery pack according to claim 7, wherein the case comprises a support beam having a mounting cavity therein, a through groove penetrating through an upper side surface of the support beam and communicating with the mounting cavity is formed in the support beam, the bottom cover plate is fitted into the mounting cavity through the through groove, and the battery cell is hermetically connected to a peripheral edge of the through groove.

9. The battery pack of claim 8, wherein the mounting cavity is open at both ends in a length direction of the support beam, the cavity communicates with the mounting cavity, and the through groove penetrates at least one end of the support beam in the length direction of the support beam, or the through groove is spaced apart from ends of both ends of the support beam in the length direction.

10. The battery pack according to claim 8, wherein the cavity is formed with a limit projection protruding outward from both side walls in the width direction of the bottom chassis, the support beam is formed with a limit groove therein, the limit projection and the limit groove extend in the length direction of the bottom chassis, and the limit projection is fitted in the limit groove.