CN221150190U

CN221150190U - Battery device

Info

Publication number: CN221150190U
Application number: CN202322430234.7U
Authority: CN
Inventors: 杨绪龙; 王帅锋; 李冉; 王娟
Original assignee: China Innovation Aviation Technology Group Co ltd
Current assignee: China Innovation Aviation Technology Group Co ltd
Priority date: 2023-09-07
Filing date: 2023-09-07
Publication date: 2024-06-14
Anticipated expiration: 2033-09-07

Abstract

The invention relates to the technical field of batteries, in particular to a battery device, which comprises a box body and a battery pack, wherein the box body is provided with a bottom plate, and a battery compartment is arranged on the bottom plate; the battery pack is arranged in the battery compartment, the battery pack comprises a battery, a converging piece and a heat exchange piece, the battery is provided with a first end and a second end which are oppositely arranged and a side face between the first end and the second end, the side face is a cylindrical face, the side face of the battery is oppositely arranged with the bottom plate, the converging piece is arranged at the first end of the battery, the converging piece is used for electrically connecting a plurality of batteries, the heat exchange piece comprises a heat exchange plate, the heat exchange plate is arranged at the second end of the battery, and the heat exchange plate is used for exchanging heat with the battery. The risk of battery device short circuit can be reduced, and the safety of the battery device is improved.

Description

Battery device

Technical Field

The disclosure relates to the technical field of batteries, and in particular relates to a battery device.

Background

Battery devices are often provided in electric vehicles for powering the electric vehicles. The battery device is provided with a plurality of batteries, and the plurality of batteries are electrically connected through the bus bar. The battery can produce a large amount of heat in the charge and discharge process, causes the battery to generate heat, in order to dispel the heat to the battery, still be provided with the heat transfer piece in the battery device. In the related art, a heat exchange medium is introduced into the heat exchange member, and the heat exchange medium with lower temperature can reduce the temperature of a partial area of the converging member, so that condensation is formed on the converging member, and the risk of short circuit exists in the battery device. In addition, heat dissipation unevenness is likely to occur inside the battery.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the present disclosure and thus may include information that does not constitute prior art known to those of ordinary skill in the art.

Disclosure of Invention

An object of the present disclosure is to provide a battery device, and further to at least reduce short-circuit risk of the battery device to some extent, while improving heat dissipation uniformity of the battery.

The present disclosure provides a battery device including:

The box body is provided with a bottom plate, and a battery compartment is arranged on the bottom plate;

The battery pack is arranged in the battery compartment and comprises a battery, a converging piece and a heat exchange piece, the battery is provided with a first end and a second end which are oppositely arranged and a side face between the first end and the second end, the side face is a cylindrical surface, the side face of the battery and the bottom plate are oppositely arranged, the converging piece is arranged at the first end of the battery and is used for electrically connecting a plurality of batteries, the heat exchange piece comprises a heat exchange plate, the heat exchange plate is arranged at the second end of the battery, and the heat exchange plate is used for exchanging heat with the battery.

The battery device provided by the embodiment of the disclosure comprises a box body and a battery pack, wherein the box body is provided with a bottom plate, a battery compartment is formed on the bottom plate, the battery pack is arranged in the battery compartment, the battery pack comprises a battery, a converging piece and a heat exchange piece, the battery is provided with a first end and a second end which are oppositely arranged, a side face is a cylindrical face, the side face and the bottom plate are oppositely arranged, the converging piece is arranged at the first end of the battery, the heat exchange plate is arranged at the second end of the battery, the converging piece and the heat exchange plate are respectively arranged at two ends of the battery, the influence of heat exchange medium in the heat exchange plate on the temperature of the converging piece is reduced, so that condensation is avoided on the converging piece, the risk of short-circuiting of the battery device is reduced, and the safety and the service life of the battery device are improved. Further, the heat exchange plate is arranged at the second end of the battery, so that the problem that in the related art, the heat dissipation of the outer layer of the battery cell is better than that of the inner layer of the battery cell due to the fact that the heat exchange plate is arranged on the side face of the battery is avoided, and the temperature difference exists between the inner layer of the battery cell and the outer layer of the battery cell.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the disclosure and together with the description, serve to explain the principles of the disclosure. It will be apparent to those of ordinary skill in the art that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived from them without undue effort.

Fig. 1 is a schematic structural view of a battery device according to an exemplary embodiment of the present disclosure;

Fig. 2 is a schematic structural view of a battery pack according to an exemplary embodiment of the present disclosure;

fig. 3 is a schematic structural view of a battery according to an exemplary embodiment of the present disclosure.

Description of the reference numerals

10. A case; 11. a bottom plate; 12. shaping the beam; 20. a battery pack; 21. a battery; 201. a first end; 202. a second end; 203. a side surface; 204. a housing; 210. a battery layer; 211. a battery main body; 212. a pole; 22. a confluence member; 221. a busbar; 23. a heat exchange member; 231. a heat exchange plate; 232. a liquid collecting pipe.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the accompanying drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/the" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present disclosure may be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present disclosure, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, as described in the example embodiments of the present disclosure, are described with the angles shown in the drawings, and should not be construed as limiting the example embodiments of the present disclosure. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

The exemplary embodiment of the present disclosure provides a battery device, as shown in fig. 1 to 3, including a case 10 and a battery pack 20, the case 10 having a bottom plate 11, and a battery compartment provided on the bottom plate 11; the battery pack 20 is arranged in the battery compartment, the battery pack 20 comprises a battery 21, a converging piece 22 and a heat exchange piece 23, the battery 21 is provided with a first end 201 and a second end 202 which are oppositely arranged, a side surface 203 is arranged between the first end 201 and the second end 202, the side surface 203 is a cylindrical surface, the side surface 203 of the battery 21 is oppositely arranged with a bottom plate 11, the converging piece 22 is arranged at the first end 201 of the battery 21, the converging piece 22 is used for electrically connecting a plurality of batteries 21, the heat exchange piece 23 comprises a heat exchange plate 231, the heat exchange plate 231 is arranged at the second end 202 of the battery 21, and the heat exchange plate 231 is used for exchanging heat with the battery 21.

The battery device provided by the embodiment of the disclosure includes a case 10 and a battery pack 20, the case 10 has a bottom plate 11, a battery compartment is formed on the bottom plate 11, the battery pack 20 is arranged in the battery compartment, the battery pack 20 includes a battery 21, a converging piece 22 and a heat exchange piece 23, the battery 21 has a first end 201 and a second end 202 which are oppositely arranged, and a side 203 which is positioned between the first end 201 and the second end 202, the side 203 is a cylindrical surface, the side 203 and the bottom plate 11 are oppositely arranged, the converging piece 22 is arranged at the first end 201 of the battery 21, the heat exchange plate 231 is arranged at the second end 202 of the battery 21, and the influence of a heat exchange medium in the heat exchange plate 231 on the temperature of the converging piece 22 is reduced by respectively arranging the converging piece 22 and the heat exchange plate 231 at two ends of the battery 21, so that condensation formed on the converging piece 22 is avoided, the risk of short-circuiting of the battery device is reduced, and the safety and the service life of the battery device are improved. Further, the heat exchange plate 231 is arranged at the second end of the battery 21, so that the problem that in the related art, the heat dissipation of the outer layer of the battery cell is better than that of the inner layer of the battery cell due to the fact that the heat exchange plate 231 is arranged on the side face of the battery 21, and then the temperature difference exists between the inner layer of the battery cell and the outer layer of the battery cell is avoided.

The following will describe each part of the battery device provided in the embodiments of the present disclosure in detail:

The case 10 is used to form the outer contour of the battery device and protect the battery pack 20 and the like in the case 10. The case 10 may include a base plate 11 and a plurality of molding beams 12, and the plurality of molding beams 12 are provided to the base plate 11 and form one or more battery compartments on the base plate 11 for accommodating the battery pack 20 and the like.

The base plate 11 may have a single-layer structure, for example, the base plate 11 is a support plate for carrying the battery pack 20. Alternatively, the base plate 11 may be a multi-layered composite structure, for example, the base plate 11 includes a support plate for carrying the battery 21 and a bottom cover plate provided on a side of the support plate remote from the battery 21 for sealing and protecting the support plate and the battery 21.

The profiled beam 12 may be provided on the top surface of the base plate 11, the bottom surface of the profiled beam 12 being in contact with the base plate 11. Or a border surrounded by a plurality of profiled beams 12 may surround the base plate 11, i.e. the sides 203 of the profiled beams 12 are in contact with the base plate 11. The profiled beams 12 may be connected by welding, bolting, riveting or glue.

In one possible embodiment, the plurality of shaped beams 12 comprises side beams that are joined end to end in sequence to form the battery compartment. For example, the enclosing frame is in a rectangular or approximately rectangular structure, the enclosing frame comprises four side beams, and the four side beams are connected end to end in sequence to form the rectangular enclosing frame.

As shown in fig. 2, the battery pack 20 includes a battery 21, a bus member 22 and a heat exchanging member 23, the battery 21 has a first end 201 and a second end 202 which are disposed opposite to each other, and a side 203 disposed between the first end 201 and the second end 202, the side 203 is a cylindrical surface, the side 203 of the battery 21 is disposed opposite to the bottom plate 11, the bus member 22 is disposed at the first end 201 of the battery 21, the bus member 22 is used for electrically connecting the plurality of batteries 21, the heat exchanging member 23 includes a heat exchanging plate 231, the heat exchanging plate 231 is disposed at the second end 202 of the battery 21, and the heat exchanging plate 231 is used for exchanging heat with the battery 21.

The battery 21 may be a cylindrical battery, where the first end face and the second end face of the cylindrical battery are planar structures, and the side face 203 of the cylindrical battery is a cylindrical surface. In the battery device, the cylindrical surface of the battery 21 and the bottom plate 11 are opposite to each other, that is, the battery 21 is arranged in a lying manner in the battery compartment, and the axis of the battery 21 is parallel to the bottom plate 11.

The batteries 21 are arranged in the battery compartment in a lying manner, and the confluence piece 22 and the heat exchange plates 231 are arranged at two ends of the batteries 21 along the axial direction, so that the dimension of the battery device in the height direction can be effectively reduced, and the battery device can be conveniently and flexibly distributed on the electric vehicle. Particularly, for lithium iron phosphate batteries, the capacity of the lithium iron phosphate batteries is relatively low due to the influence of the capacity of the materials, and the batteries 21 are arranged in a battery compartment in a lying manner, so that the overall energy density of the battery pack is improved.

As shown in fig. 3, the battery 21 includes a battery body 211 and a post 212, the battery body 211 has a cylindrical or approximately cylindrical structure, the post 212 is provided at a first end of the battery body 211, and the post 212 partially protrudes from a first end surface of the battery body 211. The pole 212 protrudes from the first end surface of the battery body 211, facilitating connection of the pole 212 and the bus bar 22.

The battery body 211 may include a housing 204 and a battery cell, where the housing 204 has a receiving cavity, the pole 212 is disposed through the housing 204, the battery cell is disposed in the receiving cavity, and the battery cell is connected with the pole 212. In the battery 21, the electrode post 212 is one electrode terminal of the battery 21, the case 204 is the other electrode terminal of the battery 21, for example, the electrode post 212 is the positive electrode terminal of the battery 21, and the case 204 is the negative electrode terminal of the battery 21.

It is understood that the housing 204 may also be provided with a plurality of poles 212, at least one of the poles 212 being the positive terminal of the battery 21 and at least one of the poles 212 being the negative terminal of the battery 21. The plurality of posts 212 are disposed at the first end 201 of the battery body 211.

The shell 204 may include a cover plate, a bottom plate and a cylinder, where the cylinder is hollow and has openings at two ends, and the cover plate and the bottom plate are plugged at two ends of the cylinder respectively. The cover forms a first end 201 of the battery 21, the bottom forms the battery 21, and the can forms a side 203 of the battery 21. The pole 212 is arranged on the cover plate, part of the pole 212 protrudes out of the cover plate, part of the pole 212 is positioned in the accommodating cavity, part of the pole 212 protruding out of the cover plate is connected with the bus piece 22, and part of the pole 212 positioned in the accommodating cavity is connected with the battery cell.

The cylinder body and the cover plate are of an integrated structure, and the cylinder body and the bottom plate are of a split structure. For example, the cylinder and the cover plate are integrally formed by stamping, and the bottom panel and the cylinder are connected by welding or riveting. Or the cylinder body and the cover plate are of split molding structures, and the cylinder body and the bottom panel are of integrated molding structures, for example, the cylinder body and the bottom panel are integrally molded through stamping, and the cover plate and the cylinder body are connected through welding or riveting and the like.

The housing 204 is made of an electrically conductive material, and the material of the housing 204 may be steel, aluminum, nickel, cadmium, manganese, tungsten, copper, or the like. The materials of the cover plate, bottom panel and can may be the same or the materials of the cover plate, bottom panel and can may be different.

The battery cell comprises a battery cell body, a first tab and a second tab, wherein the first tab and the second tab extend out of the battery cell body respectively. And the first tab is electrically connected to the post 212 and the second tab is electrically connected to the housing 204.

Optionally, the first tab and the second tab extend from an end of the cell body near the cover plate. On this basis, a current collecting assembly is arranged between the battery core main body and the cover plate, the current collecting assembly comprises a first current collecting piece and a second current collecting piece, the first current collecting piece is connected with the first tab and the pole 212, and the second current collecting piece is connected with the second tab and the shell 204.

Or the first tab extends from one end of the battery core body close to the cover plate, the second tab extends from one end of the battery core body close to the bottom panel, the first tab is connected with the pole 212 through the first current collector, and the second tab is connected with the shell 204 through the second current collector.

It should be noted that, in the embodiment of the present disclosure, the battery 21 is not limited to the electrode column 212 being used as one electrode, and the case 204 being used as the other electrode. For example, a first pole and a second pole may be disposed on the housing 204, where the first pole and the second pole are disposed in an insulating manner, and the first pole is connected to the first pole ear, and the second pole is connected to the second pole ear.

The battery cell can be a winding type battery cell, and the battery cell comprises a first pole piece, a second pole piece and a diaphragm, wherein the electrical properties of the first pole piece and the second pole piece are opposite, for example, the first pole piece is a positive pole piece, and the second pole piece is a negative pole piece. The diaphragm sheet is arranged between the first pole piece and the second pole piece, and is wound to obtain the winding type battery cell.

The battery cell has an opening surface, and the opening surface of the battery cell is disposed opposite to the heat exchange plate 231. The winding type battery cell forms a multi-layer structure through winding, and the opening surface of the battery cell refers to two end surfaces perpendicular to the winding axis of the battery cell, namely, the opening refers to a gap between the multi-layer pole pieces.

In the embodiment of the present disclosure, the battery pack 20 may include a plurality of batteries 21, the plurality of batteries 21 forming at least two battery layers 210, the battery layers 210 having at least two batteries 21 arranged in a first direction therein; the heat exchange plates 231 are provided with the battery layers 210 along both sides of a first direction, which is an extending direction of the heat exchange plates 231, respectively.

The bus bar 22 may include a wire harness plate provided at the first end 201 of the battery 21 opposite to the first end face of the battery 21, a bus bar 221 provided at a side of the wire harness plate away from the battery 21 (or the bus bar 221 may be embedded in the wire harness plate), and a connection hole provided on the wire harness plate, the battery 21 being connected with the bus bar 221 through the connection hole. The temperature detecting member may be provided on the surface of the battery 21 or the temperature detecting member may be provided on the bus bar 221, the temperature detecting member being for detecting the temperature of the battery 21. The circuit board is located the pencil board and is kept away from the one side of battery 21 to the circuit board is connected with temperature detection spare, in order to transmit the temperature signal that temperature detection spare gathered.

The bus bar 221 connects adjacent two cells 21 in the cell layer 210. The bus bar 221 may include a first bus bar portion connected to the first battery and a second bus bar portion connected to the second battery, which are adjacent two batteries 21 in the battery layer 210.

The bus bar 221 connects adjacent cells 21 in the cell layer 210 in series, and when the two electrode terminals of the cells 21 are the electrode posts 212 and the case 204, respectively, the first bus portion may be a case 204 connection portion and the second bus portion may be a electrode post 212 connection portion. The first bus bar portion is connected to the housing 204 of the first battery, and the second bus bar portion is connected to the post 212 of the second battery. When the two electrode terminals of the battery 21 are the first electrode post and the second electrode post, respectively, the first bus portion is connected to the first electrode post of the first battery, and the second bus portion is connected to the second electrode post of the second battery. Of course, in practical applications, the bus bar 221 may also be connected in parallel with the battery 21 in the battery layer 210, which is not limited in the embodiment of the disclosure.

The harness board is an insulating board to realize insulation of the bus bar 221 and the battery 21 and the circuit board and the battery 21. For example, the harness plate may be made of plastic, rubber, ceramic, or the like. The harness plate may be a plate-like structure, or the harness plate may be a film structure or the like. The circuit board may be a flexible circuit board (FPC) or a Printed Circuit Board (PCB).

The temperature acquisition member may include a temperature transmission sheet and a temperature sensor, the temperature transmission sheet may be a nickel sheet, one end of the nickel sheet is connected with the housing 204 or the busbar 221 of the battery 21, the other end of the nickel sheet is connected with the temperature sensor, and the temperature sensor is disposed on the circuit board. Or the temperature collection member may include a temperature sensor provided to the case 204 of the battery 21 or the bus bar 221, and a transmission harness through which the temperature sensor is connected to the circuit board and through which the temperature signal is transmitted to the circuit board.

The heat exchange assembly comprises a heat exchange plate 231 and a liquid collecting pipe 232, wherein the heat exchange plate 231 is arranged at the second end 202 of the battery 21, the heat exchange plate 231 is in heat conduction connection with the second end 202 of the battery 21, the liquid collecting pipe 232 is communicated with the heat exchange plate 231, and the liquid collecting pipe 232 is used for providing cooling medium for the heat exchange plate 231 and collecting heat exchange medium output by the heat exchange plate 231. The battery device is internally provided with a plurality of battery packs 20, and correspondingly, the battery device is internally provided with a plurality of heat exchange plates 231, and a liquid collecting pipe 232 is communicated with the plurality of heat exchange plates 231.

A medium channel is arranged in the heat exchange plate 231, and is used for transmitting heat exchange medium, and the medium channel is communicated with the liquid collecting pipe 232. A plurality of medium channels may be provided in the heat exchange plate 231, the plurality of medium channels extending in a length direction of the heat exchange plate 231.

The heat exchange plate 231 may have a rectangular or approximately rectangular structure, and the heat exchange plate 231 may include two oppositely disposed first surfaces and a plurality of second surfaces disposed between the two first surfaces, and the first surfaces have an area larger than that of the second surfaces. The first surface of the heat exchange plate 231 faces the second end surface of the battery 21, that is, the large surface of the heat exchange plate 231 is an effective heat exchange surface, and the heat exchange area is increased by setting the large surface of the heat exchange plate 231 as the effective heat exchange surface, so that the heat exchange efficiency is improved, and the temperature rise of the battery device is effectively inhibited.

The heat exchanger plate 231 is in heat conductive connection with the second end 202 of the battery 21 and the second end surface of the battery 21 coincides with the first surface of the heat exchanger plate 231, i.e. the orthographic projection of the battery 21 on the first surface of the heat exchanger plate 231 is located within the first surface. For example, the heat exchange plate 231 directly abuts against the second end surface of the battery 21. Or the heat exchange plate 231 and the second end surface of the battery 21 are connected by a heat conductive adhesive.

The battery cell is the coiling type battery cell, and heat exchange plate 231 sets up at battery 21 second terminal surface, and battery cell positive and negative pole piece and diaphragm can dispel the heat in a balanced way, if heat exchange plate 231 sets up at battery 21's side 203, heat exchange plate 231 is better to battery cell surface radiating effect, but to battery cell internal surface, because need pass multilayer pole piece and diaphragm, the radiating effect is poor, consequently locates the second end 202 of battery 21 with heat exchange plate 231, is favorable to the equilibrium of radiating between a plurality of retes in the battery cell.

The liquid collecting pipe 232 may include a liquid inlet pipe and a liquid outlet pipe, which are respectively disposed at two ends of the heat exchange plate 231, and are communicated with the heat exchange plate 231, and the liquid inlet pipe is used for providing heat exchange medium to the heat exchange plate 231. The drain pipe is communicated with the heat exchange plate 231, and the drain pipe is used for collecting heat exchange medium output by the heat exchange plate 231.

The heat exchange member 23 provided in the embodiment of the present disclosure can cool the battery 21, and the liquid collecting tube 232 provides the heat exchange medium with a low temperature to the heat exchange plate 231, and discharges the heat generated by the battery 21 in the charging and discharging process through the heat exchange medium. Of course, in practical application, the heat exchanging member 23 may be used to heat the battery 21, and the liquid collecting tube 232 provides the heat exchanging medium with a higher temperature to the heat exchanging plate 231.

The heat exchange plates 231 are provided with the battery layers 210 along both sides of a first direction, which is an extending direction of the heat exchange plates 231, respectively. And at least two battery layers 210 are provided at each side of the heat exchange plate 231, and at least two battery layers 210 are stacked in a second direction perpendicular to the bottom plate 11. The side of the heat exchange plate 231 is provided with the multi-layer stacked battery layers 210, so that the uniformity of heat dissipation of the plurality of battery layers 210 can be improved, and the problem of local overheating of the battery device caused by uneven heat dissipation of the multi-layer battery layers 210 due to the fact that the heat exchange plate 231 is arranged on the side surface 203 of the battery 21 is avoided.

The manifold is provided at an end of the battery layer 210 in the first direction, and the manifold extends in the third direction, and the manifold communicates with the plurality of heat exchange plates 231. In the embodiment of the present disclosure, the first direction, the second direction, and the third direction are perpendicular to each other, the first direction is the arrangement direction of the cells 21 in the cell layer 210, and the first direction is parallel to the bottom plate 11. For example, in a cartesian coordinate system, the first direction is the X-axis direction, the second direction is the Z-axis direction, and the third direction is the Y-axis direction.

The battery device includes a plurality of battery packs 20, the plurality of battery packs 20 being sequentially arranged in a third direction, the third direction being perpendicular to the first direction, and the third direction being parallel to the bottom plate 11. In the adjacent battery packs 20, the bus bars 22 on the battery packs 20 are opposed, and in order to avoid a short circuit between the adjacent bus bars 22, the bus bars 221 in the adjacent two battery packs 20 are arranged in an insulating manner.

Wherein an insulating separator is provided between two adjacent battery packs 20. The insulating separator may be of a unitary plate structure, i.e., the insulating separator is disposed between adjacent battery packs 20, and the projection of the bus bar 22 onto the insulating separator is within the insulating separator. Alternatively, the insulating separator may include a plurality of sub-separators that are discretely distributed between adjacent battery packs 20. For example, the sub-separators may be bonded to the battery packs 20 on both sides, respectively.

The battery device provided by the embodiment of the disclosure can be applied to an electric vehicle, and when the battery device is used for the electric vehicle, the battery device can be a battery pack which is installed on the electric vehicle and provides energy for the electric vehicle.

In practice, the battery pack may be mounted to the frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modularized battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any adaptations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice within the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims

1. A battery device, characterized in that the battery device comprises:

The battery pack is arranged in the battery compartment and comprises a battery, a converging piece and a heat exchange piece, the battery is provided with a first end and a second end which are oppositely arranged, the side face between the first end and the second end is a cylindrical surface, the side face of the battery and the bottom plate are oppositely arranged, the converging piece is arranged at the first end of the battery and is used for electrically connecting a plurality of batteries, the heat exchange piece comprises a heat exchange plate, the heat exchange plate is arranged at the second end of the battery, and the heat exchange plate is used for exchanging heat with the battery.

2. The battery device according to claim 1, wherein the heat exchange plates are provided with battery layers on both sides thereof in a first direction, respectively, the battery layers including a plurality of batteries arranged in the first direction, the first direction being an extending direction of the heat exchange plates.

3. The battery device according to claim 2, wherein at least two battery layers are provided on each side of the heat exchange plate, and at least two of the battery layers are stacked in a second direction perpendicular to the bottom plate.

4. The battery device of claim 2, wherein the battery device comprises:

The plurality of battery packs are sequentially arranged along a third direction, the third direction is perpendicular to the first direction, and the third direction is parallel to the bottom plate.

5. The battery device of claim 4, wherein the buss member comprises a plurality of buss bars, the buss bars in adjacent two of the battery packs being insulated.

6. The battery device according to claim 5, wherein an insulating partition plate is provided between adjacent two battery packs.

7. The battery device of claim 4, wherein the heat exchange member further comprises:

And the collecting pipe is arranged at the end part of the battery layer along the first direction and extends along the third direction, and is communicated with a plurality of heat exchange plates.

8. The battery device of any one of claims 1-7, wherein the battery comprises:

a battery main body;

And the pole is arranged at the first end of the battery body and is connected with the confluence piece.

9. The battery device according to claim 8, wherein the battery main body includes:

The shell is provided with an accommodating cavity, and the pole is arranged in the shell in a penetrating way;

The battery cell is arranged in the accommodating cavity and connected with the pole, the battery cell is a winding type battery cell and is provided with an opening surface, and the opening surface and the heat exchange plate are oppositely arranged.

10. The battery device of any of claims 1-7, wherein the heat exchange plate and the second end of the battery are connected by a thermally conductive adhesive.