CN218677367U - Upper shell of battery cell accommodating device, power battery pack, vehicle body structure and vehicle - Google Patents

Upper shell of battery cell accommodating device, power battery pack, vehicle body structure and vehicle Download PDF

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Publication number
CN218677367U
CN218677367U CN202221266002.1U CN202221266002U CN218677367U CN 218677367 U CN218677367 U CN 218677367U CN 202221266002 U CN202221266002 U CN 202221266002U CN 218677367 U CN218677367 U CN 218677367U
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bearing plate
battery cell
vehicle body
plate
cell
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戴正平
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Xiaomi Automobile Technology Co Ltd
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Xiaomi Automobile Technology Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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Abstract

The utility model relates to an upper casing, electric core accommodate device, power battery package, body structure and vehicle of electric core accommodate device, in this disclosure's the upper casing of electric core accommodate device that provides, the upper casing includes first bearing plate and the second bearing plate of concatenation each other, the internal surface of first bearing plate with the second bearing plate is used for installing electric core, wherein, the thickness of first bearing plate is greater than the thickness of second bearing plate to the surface is used for installing in body structure. The upper shell of the battery cell accommodating device can achieve the purpose of reducing the self weight on the premise of ensuring reliable installation of the battery cell.

Description

Upper shell of battery cell accommodating device, power battery pack, vehicle body structure and vehicle
Technical Field
The utility model relates to a power battery technical field specifically relates to a electricity core accommodate device and go up casing, power battery package, body structure and vehicle thereof.
Background
The CTB is a next-generation battery integration technology which integrates a battery core and a vehicle body to achieve light weight, high integration and low cost, and the core concept is to simplify the structure of a battery pack and modularize the battery pack, so that the battery core has functional and structural attributes, and the maximum integration and synergistic effect with the whole vehicle are achieved. At present, when a new energy vehicle power battery is designed, due to the consideration of the whole energy density and the cost, the mainstream design is gradually developed towards the CTB direction, and the power battery is more tightly connected with a whole vehicle frame through measures such as large castings, integration and the like. However, the battery pack structure in the related art is mostly heavy, and the energy density of the battery system is seriously affected.
SUMMERY OF THE UTILITY MODEL
The utility model provides an electricity core accommodate device's last casing, it can realize the purpose that alleviates self weight under the prerequisite of guaranteeing that electric core can reliably install.
In order to achieve the above object, the present disclosure provides an upper casing of a battery cell accommodating device, the upper casing includes a first bearing plate and a second bearing plate that are spliced with each other, an inner surface of the first bearing plate and an inner surface of the second bearing plate are used for mounting a battery cell, wherein a thickness of the first bearing plate is greater than a thickness of the second bearing plate, and an outer surface of the first bearing plate is used for being mounted on a vehicle body structure.
Optionally, the first load bearing plate has a thickness of no greater than 1mm, and/or the second load bearing plate has a thickness of no less than 0.6mm.
Optionally, the first bearing plate and the second bearing plate are both configured as sheet metal parts, and the first bearing plate and the second bearing plate are connected by welding.
Optionally, the first bearing plate and the second bearing plate are connected by laser tailor welding.
Optionally, the inner surface of the upper casing is provided with a first bonding portion, and the first bonding portion is used for connecting the battery cell, wherein the first bonding portion is configured as a structural adhesive.
On the basis of the above scheme, this disclosure still provides a battery cell accommodate device, includes: the above-mentioned upper casing; and the lower shell assembly is connected with the upper shell and jointly forms a containing chamber for containing the battery core.
Optionally, the lower housing assembly comprises: the liquid cooling plate is arranged opposite to the upper shell and used for clamping the battery cell; and the upper end of the side frame is connected with the upper shell, and the lower end of the side frame is fixed with the liquid cooling plate to form the accommodating chamber.
Optionally, the lower casing assembly further comprises a bottom guard plate, the bottom guard plate comprises a bottom guard plate body and an annular step formed on the outer edge of the bottom guard plate body, the annular step protrudes upwards and is detachably connected to the lower end of the side frame, the liquid cooling plate is inserted between the annular step and the side frame and is fixed with the side frame, and a buffer pad is arranged between the bottom guard plate body and the liquid cooling plate.
Optionally, a second bonding portion is arranged on the inner surface of the liquid cooling plate, and the second bonding portion is used for connecting the battery cell.
Optionally, the second bonding portion is configured as a thermally conductive structural adhesive.
On the basis of the above scheme, the present disclosure provides a power battery pack, which includes an electric core and the above electric core accommodating device.
Optionally, a gap through which a wire bundle passes is formed between the battery core and the inner surface of the side wall of the lower shell assembly, the battery core is connected to the inner surface of the upper shell through a first bonding part, a potting adhesive is filled between the first bonding part and the inner surface of the side wall, and the potting adhesive extends into the gap to be adhered to the upper end of the end part of the battery core.
Optionally, a reinforcing plate is arranged on the outer surface of the upper shell, and the reinforcing plate is located above the pouring sealant.
On the basis of the above scheme, the present disclosure further provides a vehicle body structure, which includes a vehicle body main body, and further includes an upper casing of the above battery cell accommodating device, or the above battery cell accommodating device, wherein the upper casing is fixedly connected to or formed by the vehicle body main body, and is used as a vehicle body floor.
Optionally, the vehicle body includes a seat cross member, and the upper housing is fixedly connected to the seat cross member through the first bearing plate.
On the basis of the scheme, the present disclosure additionally provides a vehicle comprising the power battery pack or the vehicle body structure.
Through above-mentioned technical scheme, the differentiation processing has been done on the thickness dimension of last casing to the user demand to the difference to make this last casing can accomplish the lightweight under the prerequisite that satisfies the user demand to structural strength. Specifically, in the upper housing of the battery cell accommodating device provided by the present disclosure, the upper housing is formed by splicing a first bearing plate and a second bearing plate with different thicknesses, and the inner surfaces of the first bearing plate and the second bearing plate are used for mounting the battery cell, so that the battery cell can be reliably mounted on the upper housing, and the weight reduction purpose of the upper housing can be realized on the premise that the first bearing plate is reliably mounted on the vehicle body structure.
Additionally, other features and advantages of the present disclosure will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:
fig. 1 is a partial schematic structural view of a power battery pack of the present disclosure, in which cells are shown;
FIG. 2 is another schematic structural view of a power battery pack of the present disclosure;
FIG. 3 is an enlarged view of a portion of FIG. 2 at A;
fig. 4 is a partially enlarged view at B in fig. 2.
Description of the reference numerals
1-an upper shell; 11-a first bearing plate; 111-a reinforcement plate; 12-a second bearing plate; 13-a first adhesive portion; 2-side frame; 3-liquid cooling plate; 31-a second adhesive portion; 4-a containment chamber; 5-clearance; 51-pouring sealant; 6-bottom guard board; 61-bottom guard plate body; 62-an annular step; 7-a buffer pad; 8-electric core; 9-seat cross member.
Detailed Description
The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.
In the present disclosure, unless otherwise stated, the use of directional terms such as "upper and lower" generally refer to the orientation of the drawing, and "inner and outer" refer to the inner and outer relative to the outline of the power battery pack itself as shown in fig. 1. In addition, it should be noted that terms such as "first", "second", and the like are used for distinguishing one element from another, and have no order or importance. In addition, in the description with reference to the drawings, the same reference numerals in different drawings denote the same elements. The foregoing definitions are provided to illustrate and describe the present disclosure only and should not be construed to limit the present disclosure.
Referring to fig. 1, the present disclosure provides an upper casing of a battery cell accommodating device, where the upper casing 1 includes a first bearing plate 11 and a second bearing plate 12 that are spliced with each other, inner surfaces of the first bearing plate 11 and the second bearing plate 12 are used to mount a battery cell 8, a thickness of the first bearing plate 11 is greater than a thickness of the second bearing plate 12, and an outer surface is used to mount to a vehicle body structure.
Through above-mentioned technical scheme, the differentiation processing has been done on the thickness dimension of last casing 1 to the user demand to the difference to make this last casing 1 can accomplish frivolousization under the prerequisite that satisfies the user demand to structural strength. Specifically, in the upper housing of the battery cell accommodating device provided by the present disclosure, the upper housing 1 is formed by splicing a first bearing plate 11 and a second bearing plate 12 with different thicknesses, and the inner surfaces of the first bearing plate 11 and the second bearing plate 12 are used for mounting the battery cell 8, so that the upper housing 1 can reliably mount the battery cell 8, and the upper housing 1 can be reduced in weight on the premise that the first bearing plate 11 can be reliably mounted on the vehicle body structure.
At least three embodiments are possible regarding the size arrangement of the first bearing plate 11 and the second bearing plate 12:
in a first embodiment provided by the present disclosure, the first bearing plate 11 has a thickness of no greater than 1mm.
In a second embodiment provided by the present disclosure, the thickness of the second bearing plate 12 is not less than 0.6mm.
In a third embodiment provided by the present disclosure, the thickness of the first bearing plate 11 is not greater than 1mm, and the thickness of the second bearing plate 12 is not less than 0.6mm.
In the above embodiments, the design choice of the thicknesses of the first bearing plate 11 and the second bearing plate 12 is based on the structural strength that the corresponding bearing plates need to satisfy in actual use, and on the other hand, the design choice is based on how to arrange the bearing plates to make the structure of the bearing plates thinner, so as to finally select the first bearing plate 11 and the second bearing plate 12 with appropriate thicknesses. In addition, since the first bearing plate 11 needs to be mounted to the vehicle body structure, it needs to additionally bear the weight and pressure generated by the vehicle body structure, and therefore, the thickness dimension of the first bearing plate 11 needs to be slightly larger than that of the second bearing plate 12 during design, so that the first bearing plate can meet the requirement of structural strength and realize light weight. For example, the thickness of the first bearing plate 11 may be 0.7mm, 0.8mm, 0.9mm, or 1mm, or any size therebetween, and the thickness of the second bearing plate 12 may be 0.6mm, 0.7mm, 0.8mm, or 0.9mm, or any size therebetween, so as to achieve the object of the present disclosure, which is not limited by the present disclosure.
In the specific embodiments provided by the present disclosure, the first and second load bearing plates 11, 12 may be configured in any suitable manner. Alternatively, the first bearing plate 11 and the second bearing plate 12 are both configured as sheet metal parts, and the first bearing plate 11 and the second bearing plate 12 are connected by welding. The sheet metal is a comprehensive cold processing technology aiming at the metal sheet, and comprises shearing, punching/cutting/compounding, folding, welding, riveting, splicing, forming (such as an automobile body) and the like, and the sheet metal is obviously characterized in that the thickness of the same part is consistent. The product processed by the sheet metal process is called a sheet metal part, and the sheet metal part has the characteristics of light weight, high strength, low cost, good large-scale mass production performance and the like. Therefore, the first bearing plate 11 and the second bearing plate 12 processed by the sheet metal parts can fully utilize the characteristics of the sheet metal parts to meet the requirements of the sheet metal parts on strength and weight in the using process.
In the embodiments provided by the present disclosure, the first load bearing plate 11 and the second load bearing plate 12 may be connected in any suitable manner. Alternatively, the first bearing plate 11 and the second bearing plate 12 are joined by laser tailor welding. The laser tailor-welding is to automatically piece and weld a plurality of steel materials, stainless steel materials, aluminum alloy materials and the like with different materials, different thicknesses and different coatings by adopting a laser energy source to form an integral plate, a section bar, a sandwich plate and the like so as to meet different requirements of parts on material performance, and realize light weight of equipment by using the lightest weight, the optimal structure and the optimal performance. Moreover, in the laser tailor-welding, the materials are butted with each other instead of being overlapped, so that the welding mode has the characteristics of reducing the volume of a welding seam area and not increasing the height of the welding seam, and therefore, the first bearing plate 11 and the second bearing plate 12 are welded together by adopting the laser tailor-welding, so that the light weight of the whole structure can be further realized on the basis of meeting the strength of the whole structure of the upper shell 1.
In the embodiments provided in the present disclosure, the upper casing 1 and the battery cell 8 may be connected in any suitable manner. Optionally, the inner surface of the upper housing 1 is provided with a first adhesive portion 13, and the first adhesive portion 13 is used for connecting the battery cell 8, wherein the first adhesive portion 13 is configured as a structural adhesive. Here, because the structural adhesive is high in strength, can bear a large load, is aging-resistant, fatigue-resistant and corrosion-resistant, and is stable in performance in the expected life, the requirement of the structural adhesive for the structural strength of the battery cell 8 adhered to the inner surface of the upper shell 1 in the using process can be fully met. In addition, the energy density of the power battery pack can be improved by the connection mode of adhering the battery cell 8 to the upper shell 1 through the first adhesion part 13. Specifically, the first bonding portion 13 is adopted to connect the battery cell 8 and the upper case 1 in a manner that the occupied space in the height direction can be reduced when the battery cell 8 and the upper case 1 are connected, so that in the same space, the battery cell 8 and the upper case 1 are connected through the first bonding portion 13, the height of the battery cell 8 can be larger, and the improvement of the energy density of the power battery pack is facilitated.
On the basis of the above scheme, this disclosure still provides a battery cell accommodate device, includes: the above-described upper case 1; and a lower casing assembly connected with the upper casing 1 and jointly forming a containing chamber 4 for containing the battery cell 8.
Through the technical scheme, in the electric core accommodating device provided by the disclosure, the upper shell 1 and the lower shell assembly are connected to form the accommodating chamber 4 together, and the accommodating chamber 4 can accommodate not only the electric core 8 mounted on the inner surfaces of the first bearing plate 11 and the second bearing plate 12 of the upper shell 1, and protect the electric core 8 placed in the accommodating chamber 4 from being damaged by the external environment, but also fix the electric core 8 in the electric core accommodating device, so that the rigidity of the electric core 8 in the electric core accommodating device can be further improved. The relevant contents related to the upper housing 1 have already been described in detail in the above embodiments, and thus the disclosure is not repeated herein.
In particular embodiments provided by the present disclosure, a lower housing assembly includes: the liquid cooling plate 3 is arranged opposite to the upper shell 1 and used for clamping the battery cell 8; and a side frame 2, the upper end of which is connected with the upper shell 1, and the lower end of which is fixed with the liquid cooling plate 3 to form a containing chamber 4. With this arrangement, the accommodation chamber 4 accommodating the battery cell 8 is formed to protect the battery cell 8 placed in the accommodation chamber 4. And, due to the existence of the liquid cooling plate 3, the battery cell 8 mounted on the inner surfaces of the first bearing plate 11 and the second bearing plate 12 of the upper casing 1 can be supported in an auxiliary manner, so that the battery cell 8 can be reliably mounted in the accommodating chamber 4. In addition, the provision of the liquid cooling plate 3 herein can lead out heat generated during the operation of the battery cell 8 through the liquid cooling plate 3, so as to lower the operating temperature of the battery cell 8.
In the specific embodiment provided by the present disclosure, referring to fig. 1, 2 and 4, the lower housing assembly further includes a bottom protection plate 6, the bottom protection plate 6 has a bottom protection plate body 61 and an annular step 62 formed at an outer edge of the bottom protection plate body 61, the annular step 62 protrudes upward and is detachably connected to a lower end of the side frame 2, the liquid cooling plate 3 is inserted between the annular step 62 and the side frame 2 and is fixed with the side frame 2, and a buffer pad 7 is disposed between the bottom protection plate body 61 and the liquid cooling plate 3.
In the above technical solution, the bottom protection plate 6 is provided to protect the upper liquid cooling plate 3. Here, set up this annular step 62 to upwards the protrusion, can reliably compress tightly liquid cooling plate 3 on the side frame 2 on the one hand, also can make end backplate 6 self closely the compaction at the lower extreme of side frame 2 through this annular step 62 simultaneously to reliably fix end backplate 6 on side frame 2, on the other hand sets up like this and also can reserve out the cavity of installation blotter 7 between end backplate body 61 and liquid cooling plate 3. Wherein, the cushion pad 7 can avoid the collision between the liquid cooling plate 3 and the bottom protection plate 6 due to rigid contact. Wherein, the liquid cooling plate 3 can be fixed on the side frame 2 through friction stir welding.
In the specific embodiment provided by the present disclosure, the second bonding portion 31 is disposed on the inner surface of the liquid cooling plate 3, and the second bonding portion 31 is used for connecting the battery cell 8, so that the battery cell 8 in the accommodating chamber 4 can be reliably fixed, and meanwhile, the occupied space in the height direction when the liquid cooling plate 3 is connected with the battery cell 8 can be saved, so that the saved space is used for increasing the volume of the battery cell 8.
Wherein the second adhesive portion 31 may be configured in any suitable manner. Alternatively, construct second bonding portion 31 for the heat conduction structure is glued and can satisfy on the one hand firmly bond the structural strength on liquid cooling plate 3 with electric core 8, and on the other hand, the existence that the heat conduction structure was glued also more is favorable to on transferring electric core 8's heat to liquid cooling plate 3 to transmit away through the produced heat of liquid cooling plate 3 in with electric core 8 working process.
On the basis of the above scheme, the present disclosure provides a power battery pack, which includes an electric core 8 and further includes the above electric core accommodating device. The battery cell 8 is a battery cell 8 adopted by the power battery, and the content related to the battery cell accommodating device has been described in detail in the foregoing, so that the details of the disclosure are not repeated herein.
In the specific embodiment provided by the present disclosure, referring to fig. 3, a gap 5 through which a wire bundle passes is formed between the battery cell 8 and the inner surface of the side wall of the lower casing assembly, the battery cell 8 is connected to the inner surface of the upper casing 1 through the first bonding part 13, a potting adhesive 51 is filled between the first bonding part 13 and the inner surface of the side wall, and the potting adhesive 51 extends into the gap 5 to be adhered to the upper end of the end part of the battery cell 8.
In the above technical solution, since the potting adhesive 51 is disposed between the first bonding portion 13 and the inner surface of the sidewall, and extends into the gap 5 to adhere to the upper end of the end portion of the battery cell 8, the potting adhesive 51 disposed therein can prevent the first bonding portion 13 from aging and cracking due to the exposure of the end portion of the first bonding portion 13, and can reinforce the structure of the portion of the upper casing 1 between the lower casing assembly and the battery cell 8, so as to prolong the service life thereof. In addition, since the potting adhesive 51 extends into the gap 5 to be adhered to the upper end of the end portion of the battery cell 8, it can be seen that a part of the potting adhesive 51 is adhered between the inner surface of the side wall of the lower casing assembly and the battery cell 8, so that the amount of the potting adhesive 51 is small, and the light weight of the whole structure can be further realized under the condition of meeting the structural strength. Here, the end of the first adhesive portion 13 refers to a side of the first adhesive portion 13 close to the inner surface of the sidewall of the lower case unit.
In the embodiment provided by the present disclosure, referring to fig. 1 and 3, a reinforcing plate 111 is disposed on an outer surface of the upper housing 1, and the reinforcing plate 111 is located above the potting adhesive 51. Since the structural strength of the upper case 1 at the corresponding position above the potting adhesive 51 is weak relative to other parts, the structural strength at the position can be improved by providing the reinforcing plate 111 at this position, so that the overall structural strength of the upper case 1 is improved, and the service life is prolonged.
On the basis of the above scheme, the present disclosure further provides a vehicle body structure, which has at least the following two possible implementations:
in a first implementation manner, the vehicle body structure comprises a vehicle body main body and further comprises an upper shell of the battery cell accommodating device, wherein the upper shell 1 is fixedly connected to the vehicle body main body and is used as a vehicle body floor.
In a second implementation manner, the vehicle body structure comprises a vehicle body main body and further comprises an upper shell of the battery cell accommodating device, wherein the upper shell 1 is formed by the vehicle body main body and is used as a vehicle body floor.
In a third implementation manner, the vehicle body structure comprises a vehicle body main body and further comprises the battery cell accommodating device, wherein the upper shell 1 is fixedly connected to the vehicle body main body and is used as a vehicle body floor.
In a fourth implementation, the vehicle body structure comprises a vehicle body and further comprises the battery cell accommodating device, wherein the upper shell 1 is formed by the vehicle body and is used as a vehicle body floor.
In the above four implementations, in the first and second implementations, the vehicle body structure includes the upper casing of the battery cell accommodating device, and in the third and fourth implementations, the vehicle body structure includes the battery cell accommodating device. In addition, in the first and third embodiments, the upper case 1 and the vehicle body are separately manufactured as two separate structures, and then fixedly attached to the vehicle body by welding or the like to be used as a floor of the vehicle body. In the second and fourth embodiments, the upper case 1 and the vehicle body are integrally formed, and the upper case 1 is formed by the vehicle body and serves as a vehicle body floor. In the above four implementation manners, a common manner is adopted for the vehicle body floor and the upper casing of the battery cell accommodating device, so that in the same space, since the size of one of the vehicle body floor and the upper casing 1 is saved, the size of the battery cell 8 can be made larger in the height direction, so as to improve the energy density of the power battery pack in a unit volume. The content related to the cell accommodating device has already been described in detail in the foregoing, and thus the disclosure is not repeated herein.
In the specific embodiment provided by the present disclosure, referring to fig. 1, the vehicle body includes a seat cross member 9, and the upper case 1 is fixedly connected to the seat cross member 9 through a first bearing plate 11. Therefore, the upper shell 1 is connected to the seat cross beam 9 through the first bearing plate 11, so that the self weight of the seat cross beam 9 and the weight from above the seat cross beam 9 can be applied to the first bearing plate 11, and the structural strength of the upper shell 1 in the using process can be ensured because the thickening processing is already performed on the first bearing plate 11 in the upper shell 1.
On the basis of the above solution, the present disclosure additionally provides a vehicle, which includes at least the following two possible implementations:
in a first implementation, the vehicle comprises the power battery pack.
In a second implementation, the vehicle includes the vehicle body structure described above.
In both of the above two implementations, the purpose of reducing the weight of the structure is achieved by using the upper case 1, and in the second implementation, when the vehicle body structure uses the vehicle body floor to share with the upper case 1, not only the purpose of reducing the weight of the structure is achieved, but also a part of space is saved in the height direction because the vehicle body floor in the vehicle body structure shares with the upper case 1, and the part of space can be used for enlarging the volume of the battery cell 8 so as to achieve the purpose of improving the energy density of the power battery pack.
It should be noted that, referring to fig. 1 to 4, the force-bearing transmission path of the electric core 8 in the power battery pack in the present disclosure includes two primary paths and two secondary paths:
in the main path, the battery cell 8 is bonded to the upper shell 1 through structural adhesive, and transmits force to the whole vehicle mounting point of the side frame 2 through fasteners such as bolts and the like and then transmits the force to the whole vehicle, and the path is a main force bearing path. In this transmission path, it can be found that a disconnection structure exists between the outer shell of the battery cell 8 and the inner surface of the side wall of the side frame 2, and only the upper shell 1 is arranged above the disconnection structure, which is a structural weak area, and can greatly reduce the whole-pack mode of the power battery pack. Therefore, the reinforcing plate 111 is additionally arranged on the outer surface of the upper shell 1 at the disconnection structure, and meanwhile, a local pouring and pouring sealant 51 process is added for solving the problem that the side, close to the inner surface of the side wall of the lower shell assembly, of the first bonding part 13 is exposed and easy to cause aging and cracking, so that no edge disconnection part of the first bonding part 13 is ensured, and the phenomenon of degumming and cracking of the first bonding part 13 at the upper end of the battery cell 8 in the long-term use process is avoided.
In the secondary path, the battery cell 8 is bonded to the liquid cooling plate 3 through the second bonding portion 31, then the force is transmitted to the side frame 2 through the liquid cooling plate 3, meanwhile, a small amount of force is also transmitted to the bottom protection plate 6 through the liquid cooling plate 3 and the buffer pad 7, then the force is transmitted to the side frame 2 through the bottom protection plate 6, and finally the side frame 2 transmits all the forces to the whole vehicle through the side frame 2 and the mounting point of the whole vehicle, and the path is a secondary force bearing path. In this route, because electric core 8 corresponds respectively through first bonding portion 13 and second bonding portion 31 and bonds with last casing 1 and liquid cooling plate 3 and has formed a complete structure, therefore can make the connection of this structure more reliable to finally make this structure can bring the promotion by a wide margin of whole power battery package rigidity and mode.
The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details in the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.
It should be noted that the various features described in the above embodiments may be combined in any suitable manner without departing from the scope of the invention. In order to avoid unnecessary repetition, various possible combinations will not be separately described in this disclosure.
In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (16)

1. The upper shell of the battery cell accommodating device is characterized in that the upper shell (1) comprises a first bearing plate (11) and a second bearing plate (12) which are spliced with each other, the inner surfaces of the first bearing plate (11) and the second bearing plate (12) are used for mounting a battery cell (8), the thickness of the first bearing plate (11) is larger than that of the second bearing plate (12), and the outer surface of the first bearing plate is used for mounting on a vehicle body structure.
2. The upper casing of the cell housing device according to claim 1, wherein the thickness of the first bearing plate (11) is not more than 1mm, and/or the thickness of the second bearing plate (12) is not less than 0.6mm.
3. The upper housing of the cell housing device according to claim 1, characterized in that the first bearing plate (11) and the second bearing plate (12) are each configured as sheet metal parts, and the first bearing plate (11) and the second bearing plate (12) are connected by welding.
4. The upper casing of the cell housing device according to claim 3, wherein the first bearing plate (11) and the second bearing plate (12) are connected by laser tailor welding.
5. The upper casing of the cell housing device according to claim 1, characterized in that the inner surface of the upper casing (1) is provided with a first adhesive portion (13), the first adhesive portion (13) being used for connecting the cell (8), wherein the first adhesive portion (13) is configured as a structural adhesive.
6. A cell containment device, comprising:
-an upper shell (1) according to any one of claims 1 to 5; and
and the lower shell assembly is connected with the upper shell (1) and jointly forms a containing chamber (4) for containing the battery core (8).
7. The cell containment apparatus of claim 6, wherein the lower housing assembly comprises:
the liquid cooling plate (3) is arranged opposite to the upper shell (1) and is used for clamping the battery cell (8); and
and the upper end of the side frame (2) is connected with the upper shell (1), and the lower end of the side frame is fixed with the liquid cooling plate (3) to form the accommodating chamber (4).
8. The cell housing device according to claim 7, wherein the lower casing assembly further comprises a bottom cover plate (6), the bottom cover plate (6) has a bottom cover plate body (61) and an annular step (62) formed at the outer edge of the bottom cover plate body (61), the annular step (62) protrudes upward and is detachably connected to the lower end of the side frame (2), the liquid cooling plate (3) is inserted between the annular step (62) and the side frame (2) and is fixed with the side frame (2), and a buffer cushion (7) is arranged between the bottom cover plate body (61) and the liquid cooling plate (3).
9. The cell housing device according to claim 7, characterized in that the inner surface of the liquid-cooled plate (3) is provided with a second adhesive portion (31), and the second adhesive portion (31) is used for connecting the cell (8).
10. The cell housing device according to claim 9, characterized in that the second adhesive portion (31) is designed as a thermally conductive adhesive.
11. A power battery pack comprising a battery cell (8), characterized by further comprising a battery cell containment device according to any of claims 6-10.
12. The power battery pack according to claim 11, wherein a gap (5) through which a wire bundle passes is formed between the battery cell (8) and the inner surface of the side wall of the lower casing assembly, the battery cell (8) is connected to the inner surface of the upper casing (1) through a first bonding part (13), a potting adhesive (51) is filled between the first bonding part (13) and the inner surface of the side wall, and the potting adhesive (51) extends into the gap (5) to be adhered to the upper end of the end part of the battery cell (8).
13. The power battery pack according to claim 12, wherein a reinforcing plate (111) is arranged on the outer surface of the upper shell (1), and the reinforcing plate (111) is located above the pouring sealant (51).
14. A vehicle body structure comprising a vehicle body, characterized in that it further comprises an upper casing of a cell housing device according to any one of claims 1 to 5, or a cell housing device according to any one of claims 6 to 10, wherein the upper casing (1) is fixedly connected to or formed by the vehicle body and serves as a vehicle body floor.
15. The vehicle body structure according to claim 14, characterized in that the vehicle body includes a seat cross member (9), and the upper case (1) is fixedly attached to the seat cross member (9) through the first load bearing plate (11).
16. A vehicle characterized by comprising a power battery pack according to any one of claims 11-13, or a vehicle body structure according to claim 14 or 15.
CN202221266002.1U 2022-05-19 2022-05-19 Upper shell of battery cell accommodating device, power battery pack, vehicle body structure and vehicle Active CN218677367U (en)

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