CN217656009U - Battery pack and vehicle - Google Patents

Abstract

The present disclosure relates to the field of vehicles, and in particular, to a battery pack and a vehicle. The battery pack provided by the present disclosure includes a battery pack frame and a battery pack; the battery pack comprises a bottom cooling plate and a battery unit assembly, and the battery unit assembly is connected with the bottom cooling plate; wherein, the bottom cooling plate with the battery package frame is detachable connected. The vehicle that this disclosure provided includes the battery package that this disclosure provided. When a certain functional unit of the electric core group is invalid in the battery pack provided by the disclosure, the bottom cooling plate of the electric core group with problems can be detached from the battery pack frame for maintenance or replacement. When the battery package box damaged, can dismantle the bottom cooling plate of each electric core group from the battery package box, after the battery package box of renewal, again with each electric core group and new battery package box coupling, reduced because of the damage of battery package box or electric core group certain functional unit inefficacy and cause whole battery to wrap condemned cost.

Description

Battery pack and vehicle

Technical Field

The present disclosure relates to the field of vehicle technology, and in particular, to a battery pack and a vehicle.

Background

The battery pack without the module directly arranges the plurality of battery units in the box body without forming the module by the plurality of battery units. In order to improve the energy density of power battery systems, more and more multi-battery packs adopt a non-module scheme.

Traditional no module battery pack is in the time spent, at first accomplish the manufacturing of battery package frame, adopt integral bottom plate, integral bottom plate and battery package frame fixed connection and through sealed formation battery package box that glues, then with electric core through piling up, accomplish outside the battery package frame and form an electric core subassembly, before electric core subassembly is unpacked, glue or heat conduction structure at integral bottom plate coating high strength's structure, through gluing an electric core subassembly and integral bottom plate and satisfying the demand of battery package bulk rigidity and intensity. However, the glue used for bonding the bottom of the electric core assembly is usually high in bonding strength (usually greater than or equal to 5 MPa), so that the electric core assembly is difficult to detach from the bottom plate on the battery pack box, and the electric core assembly is difficult to repair, which leads to the fact that once a structural member of the battery pack box or a functional unit in the electric core assembly fails, the whole battery pack is very easy to scrap.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the present disclosure provides a battery pack and a vehicle.

A first aspect of the present disclosure provides a battery pack, including: the battery pack frame and the battery core group;

the battery pack comprises a bottom cooling plate and a battery unit assembly, and the battery unit assembly is connected with the bottom cooling plate;

wherein, the bottom cooling plate with the battery package frame is detachable to be connected.

Furthermore, the battery unit assembly comprises a plurality of battery units, the battery units are connected with the bottom cooling plate, and the battery units are sequentially arranged along the length direction L of the battery pack frame.

Further, at least two rows of the battery unit assemblies are arranged on the bottom cooling plate, and the at least two rows of the battery unit assemblies are sequentially arranged along the width direction W of the battery pack frame;

and an intermediate cooling plate is arranged between two adjacent rows of battery unit assemblies and is connected with the bottom cooling plate.

Further, the battery pack further comprises end plates, wherein the end plates are arranged at two ends of the battery unit assembly in the length direction L;

the end plate is detachably connected with the battery pack frame.

Further, the electric core group also comprises at least one side cooling plate, and the side cooling plate is arranged on at least one side of the width direction W of the battery unit assembly;

the two ends of the side cooling plate are detachably connected with the two end plates respectively.

Furthermore, the electric core assembly further comprises two side cooling plates, the two side cooling plates are respectively arranged on two sides of the bottom cooling plate in the width direction W, and the side cooling plates are at least abutted with the side surface of one battery unit assembly;

the two ends of the side cooling plate are detachably connected with the end plates respectively.

Furthermore, the battery pack frame comprises an accommodating cavity surrounded by a front frame, a rear frame, a left side beam and a right side beam;

accept the intracavity and be equipped with the longeron, the both ends of longeron respectively with preceding frame with back frame is connected, be used for with it separates into a plurality of sub-cavities to accept the chamber, the electric core group set up in sub-cavity, the bottom cooling plate respectively with preceding frame with back frame is connected.

Further, the battery pack frame further comprises a cross beam, and the cross beam is respectively connected with the left side beam and the right side beam;

the end plate is detachably connected with the cross beam.

Further, the end plate is provided with a boss, the boss is located on one side deviating from the battery unit assembly, the boss is provided with a mounting hole, and a fastener penetrates through the mounting hole to connect the end plate with the cross beam.

Further, at least two electric core groups are arranged on the battery pack frame;

at least two the electric core group is followed the width direction of battery package frame is arranged in proper order, the electric core group with the connection can be dismantled to the battery package frame.

The second aspect of the present disclosure provides a vehicle including the battery pack.

Compared with the prior art, the technical scheme provided by the embodiment of the disclosure has the following advantages:

the battery pack provided by the embodiment of the disclosure comprises a battery pack frame and a battery pack group; the battery pack comprises a bottom cooling plate and a battery unit assembly, the battery unit assembly is connected with the bottom cooling plate, and the battery unit assembly and the bottom cooling plate can be combined to form a module. Wherein, the bottom cooling plate can be dismantled with the battery package frame and be connected, when certain functional unit of electric core group became invalid, can be with the bottom cooling plate of the electric core group that goes wrong follow battery package frame and dismantle and maintain or change. When the battery package box damaged, can dismantle the bottom cooling plate of each electric core group from the battery package box, after the battery package box of renewal, again with each electric core group and new battery package box connection. The battery pack provided by the embodiment of the disclosure can meet the requirement of after-sale local repair while realizing high integration of the battery pack, and reduces the possibility of scrapping the whole battery pack due to damage of a battery pack box body or failure of a certain functional unit of an electric core group.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure.

In order to more clearly illustrate the embodiments or technical solutions in the prior art of the present disclosure, the drawings used in the embodiments or technical solutions in the prior art description will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without inventive labor.

Fig. 1 is an exploded view of a battery pack according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a battery pack frame in a battery pack according to an embodiment of the disclosure;

fig. 3 is a schematic structural view of an electric core assembly in the battery pack according to the embodiment of the disclosure;

fig. 4 is a schematic structural diagram of a bottom cooling plate in a battery pack according to an embodiment of the disclosure;

fig. 5 is a schematic structural view of an end plate in a battery pack according to an embodiment of the disclosure.

Reference numerals: 1. the electric core group; 11. a battery cell assembly; 111. a battery cell; 12. a bottom cooling plate; 13. an intermediate cooling plate; 14. a side cooling plate; 15. an end plate; 151. a boss; 2. a battery pack frame; 21. a front frame; 22. a rear frame; 23. a left side beam; 24. a right side beam; 25. a cross beam; 26. a stringer; 3. an upper cover; 4. and a seal member.

Detailed Description

In order that the above objects, features and advantages of the present disclosure may be more clearly understood, aspects of the present disclosure will be further described below. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments of the present disclosure may be combined with each other.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure may be practiced otherwise than as described herein; it is to be understood that the embodiments disclosed in the specification are only a few embodiments of the present disclosure, and not all embodiments.

In order to improve the integration level and the conversion efficiency of the power battery, more and more battery manufacturers adopt CTP (computer to plate), namely, an integration scheme of Cell to Pack, and the space utilization rate in the battery Pack can be improved by 15-20%. The CTP integration scheme commonly employed in the current industry is as follows: the battery pack case is manufactured by first using an integral bottom cooling plate or only a flat bottom plate, and then the cells are stacked to complete the battery pack case assembly. The electric core group 1 is similar to a large module, and finally the electric core group 1 is placed into the battery pack box body from top to bottom through hoisting. Before electric core group 1 packs into the battery package box, glue at the structure of battery package box bottom coating high strength or heat conduction structure, through bonding electric core group 1 integral bottom cooling plate or flat bed board and battery box, satisfy the demand of battery package overall structure rigidity and intensity.

However, the adhesive strength of the glue used for bonding the bottom of the electric core assembly 1 is high, so that the electric core assembly 1 is difficult to detach from the battery pack box body, and the repair of the electric core assembly 1 is difficult, so that once a structural member of the battery pack box body or a functional unit in the electric core assembly 1 fails, the whole battery pack is very easy to scrap. For electric vehicles, the cost of the battery is about 40% of the cost of the whole vehicle, so the cost of scrapping is extremely high.

Based on this, the embodiment of this disclosure provides a battery package and vehicle, can support the CTP integration scheme of dismouting many times to improve the convenience that electric core group 1 dismantled, do benefit to the reprocessing of electric core group 1.

As shown in fig. 1, 2, 3, 4 and 5, the battery pack provided by the embodiment of the present disclosure includes a battery pack frame 2 and a battery pack 1; the electric core group 1 comprises a bottom cooling plate 12 and a battery unit assembly 11, the battery unit assembly 11 is connected with the bottom cooling plate 12, the battery unit assembly 11 and the bottom cooling plate 12 can be combined to form a module, the battery pack can comprise one electric core group 1, two electric core groups 1 and three electric core groups 1 \8230, wherein the bottom cooling plate 12 of the electric core group 1 is detachably connected with the battery pack frame 2, namely the bottom cooling plate 12 in each electric core group 1 is detachably connected with the battery pack frame 2, and particularly can be connected through a fastener or other detachable forms. When a certain functional unit of the electric core pack 1 fails, the bottom cooling plate 12 of the electric core pack 1 in question can be detached from the battery pack frame 2 for maintenance or replacement. When the battery pack box body is damaged, the bottom cooling plate 12 of each battery core group 1 can be detached from the battery pack box body, and after a new battery pack box body is replaced, each battery core group 1 is connected with the new battery pack box body. The battery pack provided by the embodiment of the disclosure can meet the requirement of after-sale local repair while realizing high integration of the battery pack, and reduces the possibility of scrapping the whole battery pack due to damage of a battery pack box body or failure of a certain functional unit of the electric core group 1.

In some embodiments, the battery pack frame 2 is provided with at least two battery packs 1; at least two electric core groups 1 are arranged in sequence along the width direction W of the battery pack frame 2, and the electric core groups 1 are detachably connected with the battery pack frame 2. Optionally, the bottom cooling plate 12 of the electric core group 1 is detachably connected with the battery pack frame 2, when a certain electric core group 1 fails, the electric core group 1 with problems can be detached from the battery pack frame 2, specifically, when the bottom cooling plate 12 of the electric core group 1 is detachably connected with the battery pack frame 2, the bottom cooling plate 12 of the electric core group 1 can be detached from the battery pack frame 2 for maintenance or replacement. When the battery package box damaged, can dismantle each electric core group 1 from battery package frame 2 get off, after the new battery package box of renewal, be connected each electric core group 1 with the battery package frame 2 of new battery package box again, can satisfy the demand that can locally reprocess after sale, reduced because of the damage of battery package box or certain electric core group 1 became invalid and cause the condemned possibility of whole battery package. As shown in fig. 1 and 3, the battery cell assembly 11 includes a plurality of battery cells 111, the battery cells 111 are connected to the bottom cooling plate 12, and the plurality of battery cells 111 are sequentially arranged along the length direction L of the pack frame 2. The battery unit 111 and the bottom cooling plate 12 may be connected by a heat conductive structural adhesive. The battery cell 111 may be a secondary battery that can be repeatedly charged and discharged. The battery cell 111 includes an electrode assembly, a cap assembly, and a case, wherein the case may have a hexahedral shape or other shapes, and a receiving chamber is formed inside the case to receive the electrode assembly and an electrolyte, one end of the case is open such that the electrode assembly can be placed in the receiving chamber of the case through the opening, and a plurality of electrode assemblies, which are stacked one on another, can be disposed in the receiving chamber. The housing may include a metal material, such as aluminum or aluminum alloy, and may also include an insulating material, such as plastic.

As shown in fig. 3 and 4, at least two rows of battery unit assemblies 11 are disposed on the bottom cooling plate 12, and the at least two rows of battery unit assemblies 11 are sequentially arranged along the width direction W of the battery pack frame 2; an intermediate cooling plate 13 is arranged between two adjacent rows of battery unit assemblies 11, so that heat generated by the battery units 111 contacting with the intermediate cooling plate 13 can be taken away in time, and the heat conduction and heat dissipation effects are improved. Middle cooling plate 13 is connected with bottom cooling plate 12, and through increasing middle cooling plate 13, middle cooling plate 13 can promote heat transfer area with the side contact of battery unit 111, can improve battery unit 111's radiating effect, makes battery unit 111's operational environment more suitable, has prolonged battery unit 111's life. The middle cooling plate 13 and the bottom cooling plate 12 can be connected in series, and the flow resistance of the whole cooling system can be reduced. When the battery unit 111 is operated, the cooling liquid in the middle cooling plate 13 and the bottom cooling plate 12 can radiate heat to the battery unit 111, so that the battery unit can operate at an appropriate temperature.

Optionally, heat conducting structural adhesive may be disposed on two sides of the middle cooling plate 13, and the heat conducting structural adhesive is respectively connected to the battery cell assemblies 11 on the two sides, so as to improve connection stability.

Alternatively, the bottom cooling plate 12 and the middle cooling plate 13 may be an integral structure, and specifically, may be integrally formed by an aluminum alloy extrusion process.

When two rows of battery unit assemblies 11 are arranged on the bottom cooling plate 12, an intermediate cooling plate 13 is arranged between the two rows of battery unit assemblies 11, the intermediate cooling plate 13 is connected with the bottom cooling plate 12, and particularly, the intermediate cooling plate 13 and the bottom cooling plate 12 are integrally formed through an aluminum alloy extrusion process, so that a reverse T-shaped section can be formed. When three rows of battery cell assemblies 11 are disposed on the bottom cooling plate 12, an intermediate cooling plate 13 is disposed between each two adjacent rows of battery cell assemblies 11.

In some specific embodiments, the battery pack 1 further includes end plates 15, the end plates 15 being disposed at both ends of the battery cell assembly 11 in the length direction L; the end plate 15 is detachably connected to the battery pack frame 2, and can compress the electric core pack 1, that is, apply a certain pre-tightening force to the battery units 111 at the end part, so as to compress the battery units 111 constituting the electric core pack 1. Optionally, the end plate 15 is provided with a boss 151, the boss 151 is located at a side away from the battery cell assembly 11, the boss 151 is provided with a mounting hole, and a fastener penetrates through the mounting hole to connect the end plate 15 with the battery pack frame 2. The end plate 15 is provided with the bosses 151 to facilitate the connection of the end plate 15 with the pack frame 2 and to facilitate the end plate 15 to apply a certain pre-load to the battery cells 111, thereby compressing the battery cells 111 constituting the cell pack 1. In some embodiments, the battery pack 1 further includes at least one side cooling plate 14, the side cooling plate 14 being disposed on at least one side of the battery cell assembly 11 in the width direction W; the two ends of the side cooling plate 14 are detachably connected with the two end plates 15 respectively, so that heat generated by the battery units 111 contacting with the side cooling plate 14 can be taken away in time, and the heat conduction and heat dissipation effects are improved. The contact between the side cooling plate 14 and the side of the battery unit 111 can increase the heat exchange area, improve the heat dissipation effect of the battery unit 111, make the working environment of the battery unit 111 more suitable, and prolong the service life of the battery unit 111.

Optionally, the side cooling plate 14 is bonded to the side of the battery unit 111 by a heat conducting structural adhesive, and is connected to the end plate 15 by a fastener, and the end plate 15 is composed of a front end plate and a rear end plate. The rigidity and structural strength of the entire electric core pack 1 can be improved by the connection of the end plates 15, the bottom cooling plate 12 and the side cooling plates 14.

In some specific embodiments, the electric core assembly 1 further includes two side cooling plates 14, the two side cooling plates 14 are respectively disposed at two sides of the bottom cooling plate 12 in the width direction W, and the side cooling plates 14 are abutted to at least one side of the battery cell assembly 11; both ends of the side cooling plate 14 are detachably connected to the end plates 15, respectively. When electric core group 1 includes two rows or multirow battery unit spare 11, side cooling plate 14 respectively with set up with the battery unit spare 11 butt in the outside of width direction W, can with the timely taking away of the heat that produces with the battery unit 111 of side cooling plate 14 contact, improved heat conduction, radiating effect. The contact of the side cooling plate 14 and the side of the battery unit 111 can increase the heat exchange area, improve the heat dissipation effect of the battery unit 111, make the working environment of the battery unit 111 more suitable, and prolong the service life of the battery unit 111.

In some embodiments, the battery pack frame 2 includes a receiving cavity surrounded by a front frame 21, a rear frame 22, a left side beam 23, and a right side beam 24; accept the intracavity and be equipped with longeron 26, the both ends of longeron 26 are connected with preceding frame 21 and back frame 22 respectively for will accept the chamber and separate into a plurality of sub-cavitys, electric core group 1 sets up in sub-cavitys, and just every sub-cavitys all can set up an electric core group 1, and bottom cooling plate 12 is connected with preceding frame 21 and back frame 22 respectively. Specifically, the bottom cooling plate 12 is connected to the front frame 21 and the rear frame 22 by fasteners, so that when a functional unit of the electric core assembly 1 fails, the bottom cooling plate 12 of the electric core assembly 1 with problems can be detached from the front frame 21 and the rear frame 22 for maintenance or replacement. When the battery pack case is damaged, the bottom cooling plate 12 of each electric core pack 1 can be detached from the front frame 21 and the rear frame 22, and after a new battery pack case is replaced, each electric core pack 1 is connected with the new battery pack case. The bottom cooling plate 12 is detachably connected with the longitudinal beam 26, the left side beam 23 or the right side beam 24 adjacent to the bottom cooling plate, so that the connection stability of the electric core group 1 can be improved, and the electric core group has the advantage of being convenient to disassemble and assemble.

In some embodiments, the battery pack frame 2 further includes a cross beam 25, and the cross beam 25 is connected to the left and right side beams 23 and 24, respectively; the end plates 15 are detachably connected with the cross beams 25, and can compress the electric core pack 1, namely, apply a certain pre-tightening force to the battery units 111 at the end parts, so as to compress the battery units 111 constituting the electric core pack 1.

As shown in fig. 5, the end plate 15 is provided with a boss 151, the boss 151 being located on a side facing away from the battery cell assembly 11, the boss 151 being provided with a mounting hole through which a fastener passes to connect the end plate 15 with the cross member 25. The end plates 15 are provided with the bosses 151 to facilitate the connection of the end plates 15 to the cross members 25 and to facilitate the end plates 15 to apply a certain pre-load to the battery cells 111, thereby compressing the battery cells 111 constituting the cell pack 1.

Taking the electric core groups 1 as three groups as an example, and combining with the drawings shown in fig. 1 and fig. 2, during assembly, all the electric core groups 1 are integrated with all the cooling structures to complete assembly, and are positioned by a tool, and then the battery pack frame 2 is buckled on the three groups of electric core groups 1. Or, the battery pack frame 2 may be lifted, and all the electric core packs 1 may be lifted onto the battery pack frame 2 from the bottom to the top. The battery pack frame 2 and the battery pack frame 2 are sealed by low-strength sealant with the strength less than or equal to 1MPa and sealing elements 4 such as sealing joint mixture or splicing sealing strips and the like, and can form a sealing and connecting structure which can be easily disassembled between the battery pack frame 2 and the battery pack frame 1 through fastening connection of bolts. After the assembly of the electric core group 1 and the battery pack frame 2 is completed, the electric core group 1 end plate 15 and the cross beam 25 of the battery pack frame 2 are fastened through the bolt connection, the fixed strength of the module is improved, and the overall rigidity and strength of the battery pack are improved. And finally, completing other assemblies such as water pipe connection, electric connection and the like, and closing the upper cover 3 of the battery pack.

The vehicle that this disclosure embodiment provided includes the battery package that this disclosure embodiment provided. Since the vehicle provided by the embodiment of the present disclosure has the same advantages as the battery pack provided by the embodiment of the present disclosure, detailed description thereof is omitted.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one of 8230, and" comprising 8230does not exclude the presence of additional identical elements in the process, method, article, or apparatus to which the element is applied.

The previous description is only for the purpose of describing particular embodiments of the present disclosure, so as to enable those skilled in the art to understand or implement the present disclosure. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the disclosure. Thus, the present disclosure is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. A battery pack, comprising: the battery pack frame and the battery core group;

the battery pack comprises a bottom cooling plate and a battery unit assembly, and the battery unit assembly is connected with the bottom cooling plate;

the bottom cooling plate is detachably connected with the battery pack frame;

at least two rows of battery unit assemblies are arranged on the bottom cooling plate, and the at least two rows of battery unit assemblies are sequentially arranged along the width direction of the battery pack frame;

and an intermediate cooling plate is arranged between two adjacent rows of battery unit assemblies and is connected with the bottom cooling plate.

2. The battery pack of claim 1, wherein the battery cell assembly comprises a plurality of battery cells connected to the bottom cooling plate, the plurality of battery cells being arranged in series along a length of the battery pack frame.

3. The battery pack according to claim 1, wherein the battery cell pack further comprises end plates disposed at both ends in the length direction of the battery cell assembly;

the end plate is detachably connected with the battery pack frame.

4. The battery pack according to claim 3, wherein the electric core pack further comprises at least one side cooling plate provided at least one side in the width direction of the battery cell assembly;

the two ends of the side cooling plate are detachably connected with the two end plates respectively.

5. The battery pack according to claim 4, wherein the battery cell pack further comprises two side cooling plates, the two side cooling plates are respectively disposed at both sides of the bottom cooling plate in the width direction, and the side cooling plates abut against at least one side of the battery cell assembly;

and two ends of the side cooling plate are detachably connected with the end plates respectively.

6. The battery pack of claim 1, wherein the battery pack frame comprises a receiving cavity bounded by a front frame, a rear frame, a left side beam, and a right side beam;

accept the intracavity and be equipped with the longeron, the both ends of longeron respectively with preceding frame with back frame is connected, be used for with it separates into a plurality of sub-cavities to accept the chamber, the electric core group set up in sub-cavity, the bottom cooling plate respectively with preceding frame with back frame is connected.

7. The battery pack of claim 6, wherein the battery pack frame further comprises cross beams connected to the left and right side beams, respectively;

the end plates are detachably connected with the cross beam.

8. The battery pack of claim 7, wherein the end plate is provided with a boss on a side facing away from the battery cell assembly, the boss being provided with a mounting hole through which a fastener passes to connect the end plate with the cross member.

9. The battery pack according to any one of claims 1 to 8, wherein the battery pack frame is provided with at least two of the electric core groups;

at least two the electric core group is followed the width direction of battery package frame arranges in proper order, the electric core group with the connection can be dismantled to the battery package frame.

10. A vehicle characterized by comprising the battery pack according to any one of claims 1 to 9.

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