CN210984776U

CN210984776U - Battery pack and electric automobile with same

Info

Publication number: CN210984776U
Application number: CN201921449292.1U
Authority: CN
Inventors: 郑必麟; 马爱国; 谈际刚; 邵保林; 凌添
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-07-10
Anticipated expiration: 2029-08-30

Abstract

The utility model discloses a battery pack and electric automobile who has it, battery pack includes: the shell is provided with a battery core cavity, the shell is provided with a plurality of limiting plates which extend along the width direction of the battery core cavity and are arranged at intervals along the length direction of the battery core cavity, the battery pack is clamped between two adjacent limiting plates, and the heat exchange plate is connected with the limiting plates and covers the limiting plates and is arranged on the battery core cavity. Set up the battery package through setting up the limiting plate clamp, can utilize the limiting plate to inject the size of battery package on casing length direction, prevent that the battery package from taking place the swell inflation on the length direction of casing, utilize heat transfer board and limiting plate to link to each other, can utilize the heat transfer board to inject the size of battery package at limiting plate width direction, further prevent that the battery package from taking place the swell in the thickness direction of casing, not only can guarantee to rise the reliable fixed of battery package and casing, can also promote the job stabilization nature of battery package.

Description

Battery pack and electric automobile with same

Technical Field

The utility model belongs to the technical field of the battery technique and specifically relates to a battery pack and electric automobile who has it is related to.

Background

In the related technology, the battery is fixed on the bottom support through a support frame, a locking screw and the like in the battery box, and the structure is relatively complex; electric core adopts the multirow to arrange, and single electric core volume receives the restriction, and hoards the heat easily, and whole space utilization is lower, because the inside connecting pieces such as support frame and locking screw that use of battery box have reduced the volume utilization of box in addition, and the practical application volume of battery box can reduce, can reduce battery package energy density.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, an object of the present invention is to provide a battery assembly, which can not only ensure the reliable fixation of a battery pack, but also effectively prevent the battery pack from bulging.

The utility model also provides an electric automobile who has above-mentioned battery pack.

According to the utility model discloses battery pack of first aspect includes: casing, battery package and heat transfer board, it has the electric core chamber to inject on the casing, be equipped with on the casing and follow electric core chamber width direction extends and follows a plurality of limiting plates of electric core chamber length direction spaced apart setting, the battery package presss from both sides and establishes adjacent two between the limiting plate, the heat transfer board with the limiting plate links to each other and covers and establish on the electric core chamber.

According to the utility model discloses a battery pack, press from both sides through setting up the limiting plate and establish the battery package on the one hand, can utilize the limiting plate to prescribe a limit to the size of battery package on casing length direction, prevent that the battery package from taking place the swell on the length direction of casing, on the other hand, utilize the heat transfer board to link to each other with the limiting plate, can utilize the heat transfer board to prescribe a limit to the size of battery package at limiting plate width direction, further prevent that the battery package from taking place the swell on the thickness direction of casing, not only can guarantee the reliable fixed of battery package and casing, can also promote the job stabilization nature of battery package.

According to some embodiments of the invention, the battery pack comprises: the battery cell comprises a plurality of battery cells, at least one limiting strip and a plurality of pole connecting pieces, wherein the battery cells are arranged along the width direction of a shell, the limiting strips are arranged along the length direction of the shell, the battery cells are clamped between adjacent limiting plates, the limiting strips are arranged along the length direction of the shell, the limiting strips are connected with the end portions of the battery cells, and the pole connecting pieces are connected between adjacent electrodes of the battery cells so as to enable the battery cells to be arranged in series or in parallel.

According to some embodiments of the present invention, in the thickness direction of the housing, the electric core single layer sets up just the thickness direction of the electric core with the length direction of the housing is parallel.

According to the utility model discloses a some embodiments, spacing is two, two spacing follows the spaced apart setting of width direction of casing, electricity core is connected two between the spacing, just the limiting plate is located two between the spacing.

According to some embodiments of the utility model, the utmost point post connection piece is located the top of spacing strip and with spacing spaced apart setting of spacing strip.

According to some embodiments of the invention, the housing comprises: tray, sealed lid and automatically controlled box, it has upwards open electric core groove to be restricted to on the tray, the limiting plate is established on the tray and follow the width direction of tray extends, and is a plurality of the limiting plate is followed the spaced apart setting of length direction of casing, sealed lid cover is established on the battery package and with the tray can be dismantled continuously, in order to open electric core groove or seal electric core groove form the electric core chamber, automatically controlled box is established on the tray, be equipped with signal connection in the automatically controlled box the controller of battery package.

According to some embodiments of the invention, the thickness of the tray is less than 50 mm.

According to some embodiments of the utility model, be equipped with coolant liquid entry and coolant liquid export on the casing, the heat transfer board includes: heating panel, heating member and intercommunication are in the coolant liquid entry with a plurality of cooling tubes between the coolant liquid export, the heating panel is connected the limiting plate, the cooling tube is arranged on the heating panel, and is a plurality of cooling tube parallel arrangement, adjacent two liquid flow opposite direction in the cooling tube, the heating member is established be used for on the cooling tube right the battery package heating.

According to some embodiments of the utility model, the limiting plate orientation one side of heating panel is equipped with the edge a plurality of screw holes that the length direction interval of limiting plate set up, the heating panel corresponds the position of screw hole is formed with the connecting hole, the heat transfer board is in through the cooperation the connecting hole with connecting piece between the screw hole is connected on the limiting plate.

According to the utility model discloses electric automobile of second aspect includes according to the above-mentioned embodiment battery pack.

According to the utility model discloses an electric automobile, through adopting above-mentioned embodiment battery pack, can prevent that the battery package from taking place the swell inflation on the length direction of casing, and then can promote electric automobile's job stabilization nature and reliability, reduced because of the battery pack trouble leads to the unable incident probability of moving of electric automobile.

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

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a schematic structural view of a battery pack according to an embodiment of the present invention;

fig. 2 is an exploded view of a battery assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an electric vehicle according to an embodiment of the present invention.

Reference numerals:

s: an electric vehicle; 100: a battery assembly; 200: a vehicle body;

10: a housing; 11: a tray; 111: a connecting seat; 112: a coolant inlet;

113: a coolant outlet; 12: a sealing cover; 13: an electronic control box; 14: a limiting plate;

20: a battery pack; 21: an electric core; 22: connecting the pole column with a connecting sheet; 23: a limiting strip;

30: a heat exchange plate; 31: a heat dissipation plate; 32: a connecting member.

Detailed Description

Embodiments of the present invention are described in detail below, and the embodiments described with reference to the drawings are exemplary.

The battery assembly 100 and the electric vehicle S having the same according to the embodiment of the present invention are described below with reference to fig. 1 to 3.

As shown in fig. 3, according to the utility model discloses electric automobile S, include: a vehicle body 200 and a battery assembly 100, the battery assembly 100 may be provided on a chassis of the vehicle body 200.

As shown in fig. 1 and 2, a battery assembly 100 according to an embodiment of the present invention may include: a case 10, a battery pack 20, and a heat exchange plate 30.

Wherein, be injectd in the casing 10 and have the electric core chamber, battery package 20 holds in the electric core intracavity, can keep apart battery package 20 with the external world, thereby prevent that battery package 20 from leading to corrosion damage with the air contact for a long time, thereby the shock-resistant performance of casing 10 is better than battery package 20 in addition, and casing 10 can reduce because of the damage that external force impact led to the fact battery package 20, prolongs battery package 20's life.

Be equipped with on casing 10 along electric core chamber width direction extend and along a plurality of limiting plate 14 of electric core chamber length direction spaced apart setting, battery package 20 presss from both sides and establishes between two adjacent limiting plates 14, at the in-process that the user used battery pack 100, when charging and discharging battery package 20, the inside intensification that lasts of battery package 20, and then lead to the electrolyte to decompose the gasification, make the internal pressure increase, reach the certain degree when pressure, arouse battery package 20 to bulge easily, can be because effectively restrain the bulge of battery package 20 on electric core chamber length direction in the battery use through establishing a plurality of limiting plate 14 of electric core chamber length direction spaced apart setting.

The heat exchange plate 30 is connected with the limiting plate 14 and covers the core cavity, the heat dissipation plate 31 is clamped between the battery pack 20 and the inner peripheral wall of the casing 10, the heat dissipation plate 31 is attached to the inner peripheral wall of the casing 10, the heat dissipation plate 31 is arranged between the battery pack 20 and the inner peripheral wall of the casing 10, and therefore heat dissipation of the battery cell 21 can be achieved under the condition that safe use of the heat exchange plate 30 is guaranteed. In addition, the heat exchange plate 30 is connected to the stopper 14, so that the battery pack 20 can be stopped in the thickness direction of the case 10, and thus swelling of the battery pack 20 in the thickness direction of the case 10 during charging and discharging can be prevented.

From this, according to the utility model discloses a battery pack 100, on the one hand press from both sides through setting up limiting plate 14 and establish battery package 20, can utilize limiting plate 14 to prescribe a limit to battery package 20 size on casing 10 length direction, prevent that battery package 20 from taking place the swell on casing 10's length direction, on the other hand, utilize heat transfer plate 30 and limiting plate 14 to link to each other, can utilize heat transfer plate 30 to prescribe a limit to battery package 20 size at limiting plate 14 width direction, further prevent that battery package 20 from taking place the swell on casing 10's thickness direction, not only can guarantee to rise battery package 20 and casing 10 reliably fixed, can also promote battery package 20's job stabilization nature.

According to the utility model discloses electric automobile S, through the battery pack 100 who adopts above-mentioned structure, can promote electric automobile S' S job stabilization nature.

As shown in fig. 2, according to some embodiments of the present invention, the battery pack 20 includes a plurality of battery cells 21, the battery cell 21 is a kinetic energy core of the electric vehicle S, and the electric cell 21 discharges electricity to drive a motor of the vehicle, so as to provide kinetic energy for traveling of the vehicle, and when the electric vehicle S is not needed, the battery cell 21 can be charged, and the battery cell 21 can be repeatedly used.

In this embodiment, the battery pack 20 further includes: at least one spacing 23 and a plurality of utmost point post connection piece 22, a plurality of electric cores 21 extend and arrange along the length direction of casing 10 along the width direction of casing 10, and the arrangement is simple, can make full use of the space in electric core chamber moreover, is favorable to reducing the occupation space of battery package 20 on casing 10 thickness direction, and then can reduce the thickness of casing 10.

A plurality of batteries 21 are arranged in order and then clamped between adjacent limiting plates 14, the limiting strip 23 extends along the length direction of the casing and is connected with the end of the battery 21, the limiting strip 23 is arranged on one side of the width direction of the battery pack 20, for example, each battery 21 has a left end and a right end, the limiting strip 23 can be arranged on the left side of the battery pack 20, the left ends of all the batteries 21 can be connected to the limiting strip 23 on the left side of the battery pack 20, the limiting strip 23 can also be arranged on the right side of the battery pack 20, the right ends of all the batteries 21 can be connected to the limiting strip 23 on the right side of the battery pack 20, and the limiting strip 23 can be connected to the casing 10 through fasteners.

Not only can utilize spacing 23 to promote the cooperation stability of a plurality of electric cores 21 from this, can also make up into a whole to a plurality of electric cores 21, provide convenience for the assembly and the transportation of battery package 20, can utilize spacing 23 to inject electric core 21 and remove in casing 10 width direction, prevent that electric core 21 from taking place to remove, also can restrain electric core 21 swelling phenomenon in length direction.

The pole connecting sheet 22 is connected between the electrodes of the adjacent battery cells 21 to connect the plurality of battery cells 21 in series or in parallel, and the pole connecting sheet 22 is used to combine a plurality of independent battery cells 21 into a whole, so that parameters such as voltage of the battery pack 20 can be set according to the requirement of the battery assembly 100.

The electric vehicle S needs a larger voltage to ensure normal running of the electric vehicle S in use, but the voltage of a single battery cell 21 is smaller, the battery cell 21 using a large voltage is higher in cost, and the safety factor is low, at this time, a plurality of battery cells 21 can be connected in series, the series battery cell 21 at this time can provide a higher voltage for the electric vehicle S, and in order to connect the plurality of battery cells 21 in series, an appropriate pole connecting piece 22 needs to be used, and the plurality of battery cells 21 are connected between electrodes of adjacent battery cells 21 through the pole connecting piece 22 to be connected in series or in parallel, so as to obtain a higher voltage or electric quantity.

Spacing 23 and utmost point post connection piece 22 are spaced apart to be set up, and spacing 23 and utmost point post connection piece 22 and the in-process of electric core 21 assembly, spacing 23 are less than utmost point post connection piece 22 height, avoid causing the influence to welding utmost point post connection piece 22, and spacing 23 and the condition emergence that utmost point post connection piece 22 contact caused electric core 21 short circuit in addition. Wherein, all be equipped with insulating coating between spacing 23 and the electric core 21 and between heat transfer board 30 and the electric core 21, can be the rubber coating, prevent to take place creepage phenomenon because of the distance is too near between spacing 23, heat transfer board 30 and the utmost point post connection piece 22, can promote battery package 20's job stabilization nature and security from this.

As shown in fig. 2, the battery cells 21 are arranged in a single layer in the thickness direction of the casing 10, and by arranging the battery cells 21 arranged in a single layer in the thickness direction of the battery assembly 100, the thickness direction of the battery cells 21 is parallel to the length direction of the casing 10. The size of the battery pack 20 in the thickness direction of the battery assembly 100 can be reduced, for example, the battery assembly 100 can be tiled at the bottom of the electric vehicle S, the battery cells 21 extend along the width direction of the battery assembly 100 and are arranged along the length direction of the battery assembly 100, by increasing the coverage area of the battery assembly 100 in the horizontal direction, on the premise that the battery assembly 100 has sufficient voltage and electricity storage capacity, the thickness of the battery assembly 100 is reduced, because the area of the bottom of the electric vehicle S is larger, but the distance from the ground is closer, only the battery assembly 100 with the above structure can fully utilize the space at the bottom of the electric vehicle S, and the battery assembly 100 can be prevented from being damaged due to the fact that the distance from the ground is too close to the ground.

As shown in fig. 2, the thickness direction of the battery cells 21 is parallel to the length direction of the casing 10, so that the number of the battery cells 21 accommodated between the limiting plates 14 can be increased to improve the performance of the battery pack 20, and it can be ensured that each battery cell 21 can exchange heat with the heat exchange plate 30 to achieve a heat dissipation effect, thereby preventing the battery cells 21 from being stacked to cause heat accumulation.

The electricity storage capacity of battery package 20 can be increased through the combination of a plurality of electric cores 21, and electric core 21 can also promote the radiating effect through the individual layer setting in the thickness direction of battery pack 100 in addition, and the heat in the electric core 21 that the individual layer set up passes through sealed lid 12 or tray 11 alright diffusion to the environment in, reduces because of the heat that the multilayer stack set up and produces and gathers.

According to some embodiments of the utility model, spacing 23 is two, two spacing 23 are spaced apart from the setting along the width direction of casing 10, electric core 21 presss from both sides and establishes between two limiting plates 14, in other words, the left and right sides of battery package 20 respectively sets up a spacing 23, the left end of all electric cores 21 is all connected on being located the left spacing 23 of battery package 20, the right-hand member of all electric cores 21 is all connected on being located the spacing 23 on battery package 20 right side, spacing 23 can be fixed on tray 11 with the help of the fastener, spacing 23 limits the displacement of electric core 21 in battery package 20 width direction, limiting plate 14 is located between two spacing 23 in addition, can fix on tray 11 with the help of the fastener through spacing 23, spacing 23 limits the displacement of electric core 21 in battery package 20 width direction.

According to some embodiments of the invention, the housing 10 comprises: tray 11, sealed lid 12 and automatically controlled box 13, be limited to upwards open electric core 21 groove on the tray 11, limiting plate 14 is established on tray 11 and is extended along the width direction of tray 11, and a plurality of limiting plates 14 set up along the length direction spaced apart of casing 10, sealed lid 12 covers and establishes on battery package 20 and can dismantle with tray 11 and link to each other, form the electric core chamber with opening electric core 21 groove or closed electric core 21 groove, automatically controlled box 13 establishes on tray 11, be equipped with the control ware of signal connection battery package 20 in the automatically controlled box 13.

As shown in fig. 2, the housing 10 includes: tray 11 and sealed lid 12, the electricity core chamber is established on tray 11, battery package 20 is established at the electricity core intracavity, automatically controlled box 13 detachably fixes on tray 11, be equipped with a plurality of connecting seats 111 on tray 11, a plurality of connecting seats 111 are along the spaced apart setting of circumference of tray 11, connecting seat 111 is suitable for to connect battery pack 100 detachably on electric automobile S, particularly, be formed with the connecting hole on connecting seat 111, electric automobile S corresponds the position of connecting hole and is formed with the bolt hole, the bolt passes the connecting hole and connects in the bolt hole soon and then install battery pack 100 on electric automobile S.

Wherein, sealed lid 12 can dismantle with tray 11 and link to each other in order to open or close the electric core chamber, and sealed lid 12 covers and establishes on battery package 20 to with tray 11 sealed cooperation, promote the seal nature in electric core chamber from this, prevent that external environment from corroding battery package 20 in the electric core intracavity, or be that electric core chamber is intake and damage battery package 20.

Further, automatically controlled box 13 is established on the surface of casing 10, and be equipped with the battery control module of signal connection battery package 20 on automatically controlled box 13, the circuit breaker, the fuse, communication interface and terminal, that is to say, set up automatically controlled box 13 in the outside of casing 10, battery control module, the circuit breaker, the fuse, communication interface and terminal are all integrated on automatically controlled box 13, wherein battery control module, circuit breaker and fuse can be established in automatically controlled box 13, communication interface and terminal can be established on the surface of automatically controlled box 13, make things convenient for communication interface and terminal to be connected with the external world, communication interface can be low voltage communication interface, the terminal can be high voltage terminal.

From this, according to the utility model discloses a battery pack 100 sets up automatically controlled box 13 through the outside at casing 10 to set up battery control module, circuit breaker, fuse, communication interface and wiring end etc. on automatically controlled box 13, can promote the degree of integration of automatically controlled box 13 inner part, can promote the space utilization in the electric core intracavity moreover, in addition, need not to change whole battery package 20 when certain hardware fault needs to be changed in automatically controlled box 13, improved the maintenance convenience.

Electric core 21 arranges at the thickness direction individual layer of casing 10, and the thickness of battery package 20 is less, and the size less than or equal to 50mm of tray 11 on battery pack 100 thickness direction, so can guarantee the lower height dimension of whole fixed knot structure, assembles into the higher frame of size in the cooperation after battery package 20 with electric core 21, can directly hide battery package 20 in the high space of frame, need not extra battery compartment and arranges, practices thrift the whole car and arranges the space.

Optionally, the tray 11 is formed into a metal alloy material, and can be made of aluminum alloy or other materials, the small deformation of the movement of the frame when the tray is matched and fixed with the frame does not affect the structural stability of the tray, and meanwhile, the characteristic of the metal material can ensure that the fixed structure has better anti-extrusion and anti-collision capabilities.

Optionally, the sealing cover 12 is formed as a plastic polymer material, which can reduce the mass of the whole casing 10, and can improve the energy density of the battery assembly 100 when the battery assembly 100 is assembled by matching with the battery cell 21.

According to some embodiments of the present invention, the housing 10 is provided with a coolant inlet 112 and a coolant outlet 113, and the heat exchange plate 30 includes: the cooling plate 31 is connected with the limiting plate 14, the cooling pipes are arranged on the cooling plate 31 in an S shape and are arranged in parallel, the flow directions of liquid in two adjacent cooling pipes are opposite, and the heating elements are arranged on the cooling pipes and are used for heating the battery pack 20.

Wherein, the cooling tube is arranged on heating panel 31, the cooling tube can be the S-shaped and arrange, arrange on heating panel 31 through being the S-shaped with the cooling tube, can arrange the most cooling tube on fixed usable floor area, can increase the area of contact of cooling tube and battery package 20, then can increase the radiating effect of heat transfer board 30 subassembly, guarantee that battery package 20 can normally work, and a plurality of cooling tube parallel arrangement, the liquid flow opposite direction in two adjacent cooling tubes, can make the temperature difference of electric core 21 between two adjacent cooling tubes minimum, control the heat in ideal scope.

Specifically, the coolant flows from the coolant inlet 112 and then the cooling pipe, and then flows out from the coolant outlet 113, and flows in the cooling pipe inside the battery assembly 100 by using the coolant, and the heat generated by the battery pack 20 is transferred to the coolant through heat conduction, so that the temperature of the battery pack 20 is reduced, the coolant exchanges heat with the casing 10 to cool the battery cell 21, and the damage caused by the over-high temperature of the battery cell 21 is prevented.

The coolant has a lower temperature at a position adjacent to the coolant inlet 112, and the temperature of the coolant gradually increases as heat exchange with the battery pack 20 is performed, and when reaching the coolant outlet 113, the temperature of the coolant is higher, the heat dissipation efficiency is poor, and the flows of the coolant in the adjacent cooling tubes are reversed, wherein the coolant inlet 112 of one cooling tube is arranged adjacent to the coolant outlet 113 of the adjacent cooling tube, and one lower temperature is higher than the other lower temperature, so that uniform distribution of the temperature at different positions of the heat exchange plate 30 assembly can be achieved.

Further, be equipped with the heating member on the cooling tube, the heating member is used for heating electric core 21 in the battery package 20, in the in-service use of battery package 20, often meet low temperature weather, electric core 21 work efficiency under low temperature environment is low, can't run even, in order to control the temperature of electric core 21 in the battery package 20 at the temperature that electric core 21 can normally work, just can be through the dress heating member for on the heating panel 31, for example, when electric automobile S is under low temperature environment, the heating member is under the condition that electric core 21 can not normally work, heat release through the heat effect of electric current and heat the coolant liquid, again with the coolant liquid give electric core 21 intensification through the cooling tube, make electric core 21 can be under the temperature of normal work.

In addition, the one side of heating member is hugged closely together through a plurality of cooling tubes and electric core 21 many places, has increased area of contact, improves the heat exchange efficiency of thermal management heat exchanger plate 30, reduces energy loss, and the heating member another side pastes with the cooling tube mutually, in conducting the heat to the coolant liquid, the coolant liquid is through flowing, has uniformed all electric core 21's temperature, prevents the thermal runaway that local overheat triggered.

The heating element generates heat after passing current, and the cooling liquid heats the battery cell 21 by passing the heat through the cooling pipe and the heat conducting pad; and multiple heating elements can be added according to heating power requirements and distributed on different pipeline positions. The battery is heated by the heated cooling liquid, so that the temperature of all the battery cores 21 can be well uniform, and thermal runaway caused by local overheating is prevented.

Therefore, according to the heat exchange plate 30 assembly of the utility model, on one hand, by arranging a plurality of cooling pipes with opposite flow directions, the heat dissipation efficiency of the heat exchange plate 30 assembly can be ensured to be set evenly, the temperature difference of the battery pack 20 caused by uneven heat exchange at different positions of the heat exchange plate 30 assembly is prevented from being too large, the heat dissipation efficiency of the battery pack 20 can be improved, and the damage caused by too high local temperature of the battery pack 20 or the influence of too low local temperature on the working efficiency can be prevented; on the other hand, the temperature of the heat exchange plate 30 assembly can be controlled by arranging the heating element, so that the situation that the battery pack 20 cannot work or the working efficiency is low due to too low external environment temperature is prevented.

According to the utility model discloses battery pack 100 and electric automobile S through adopting above-mentioned heat transfer board 30 subassembly, not only can promote battery pack 100 and electric automobile S' S work efficiency, can guarantee moreover that battery pack 100 and electric automobile S normally work under low temperature environment.

As shown in fig. 1 and 2, one side of the limiting plate 14 facing the heat dissipation plate 31 is provided with a plurality of threaded holes arranged at intervals along the length direction of the limiting plate 14, the position of the heat dissipation plate 31 corresponding to the threaded holes is formed with a connecting hole, the heat exchange plate 30 is connected to the limiting plate 14 through a connecting piece 32 matched between the connecting hole and the threaded hole, the connecting piece 32 can be a bolt or a screw, the heat exchange plate 30 is fixed to the limiting plate 14 through the connecting piece 32, the overall stability of the battery assembly 100 is improved, the bulge of the battery cell 21 in the height direction of the battery assembly 100 can be effectively inhibited, and the use safety of the battery assembly.

Wherein, reserve the screw hole on the limiting plate 14, fix heating panel 31 on limiting plate 14 through a plurality of bolt or screw, when electric core 21 can obtain abundant heat transfer, can also guarantee that electric core 21 is reliably fixed, effectively restrain electric core 21 and send out the drum.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

In the description of the present invention, "the first feature" and "the second feature" may include one or more of the features. In the description of the present invention, "a plurality" means two or more. In the description of the present invention, the first feature "on" or "under" the second feature may include the first and second features being in direct contact, and may also include the first and second features being in contact with each other not directly but through another feature therebetween. In the description of the invention, the first feature being "on", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.

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

Claims

1. A battery assembly, comprising:

the battery comprises a shell, a plurality of battery cores and a plurality of battery cores, wherein a battery core cavity is defined on the shell, and a plurality of limiting plates which extend along the width direction of the battery core cavity and are arranged at intervals along the length direction of the battery core cavity are arranged on the shell;

the battery pack is clamped between two adjacent limiting plates;

and the heat exchange plate is connected with the limiting plate and covers the electric core cavity.

2. The battery pack of claim 1, wherein the battery pack comprises:

the battery cores extend in the width direction of the shell and are arranged in the length direction of the shell, and the battery cores are clamped between the adjacent limiting plates;

the limiting strip extends along the length direction of the shell and is connected with the end part of the battery core;

and the pole connecting sheets are connected between the electrodes of the adjacent electric cores so as to connect the electric cores in series or in parallel.

3. The battery assembly of claim 2, wherein the cell is arranged in a single layer in a thickness direction of the casing and the thickness direction of the cell is parallel to a length direction of the casing.

4. The battery assembly according to claim 2, wherein the number of the limiting strips is two, the two limiting strips are arranged at intervals along the width direction of the shell, the battery cell is connected between the two limiting strips, and the limiting plate is located between the two limiting strips.

5. The battery assembly of claim 2, wherein the post connection tab is positioned above and spaced apart from the retention bar.

6. The battery assembly of claim 1, wherein the housing comprises:

the battery cell comprises a tray, a plurality of shell bodies and a plurality of limiting plates, wherein a battery cell groove which is opened upwards is defined on the tray, the limiting plates are arranged on the tray and extend along the width direction of the tray, and the limiting plates are arranged at intervals along the length direction of the shell bodies;

the sealing cover covers the battery pack and is detachably connected with the tray so as to open the battery cell groove or close the battery cell groove to form the battery cell cavity;

the electronic control box is arranged on the tray, and a controller in signal connection with the battery pack is arranged in the electronic control box.

7. The battery assembly of claim 6, wherein the tray is less than 50mm thick.

8. The battery pack of claim 1, wherein the housing defines a coolant inlet and a coolant outlet, and the heat exchanger plate includes:

the heat dissipation plate is connected with the limiting plate;

the cooling pipes are communicated between the cooling liquid inlet and the cooling liquid outlet, the cooling pipes are arranged on the heat dissipation plate and are arranged in parallel, and the liquid flow directions in two adjacent cooling pipes are opposite;

the heating member is established be used for on the cooling tube right the battery package heating.

9. The battery pack according to claim 8, wherein the limiting plate is provided with a plurality of threaded holes at intervals along a length direction of the limiting plate on a side of the limiting plate facing the heat dissipation plate, the heat dissipation plate is formed with connection holes at positions corresponding to the threaded holes, and the heat exchange plate is connected to the limiting plate through connection members fitted between the connection holes and the threaded holes.

10. An electric vehicle characterized by comprising the battery assembly according to any one of claims 1 to 9.