CN115810851A - Battery module, battery package and electric automobile - Google Patents

Abstract

The invention discloses a battery module, a battery pack and an electric automobile, which comprise a battery core group, a collecting assembly and end plates, wherein the battery core group comprises a plurality of battery cores arranged along a preset direction, the collecting assembly comprises a collecting plate and plug connectors, the plug connectors are arranged on the collecting plate, the end plates are arranged at two ends of the battery core group along the arrangement direction of the battery cores, the upper end surface of each end plate is provided with a groove sunken towards the bottom of the battery module, the plug connectors are arranged in the grooves, and the upper end surface of each plug connector is not higher than the upper end surface of the collecting plate. Through setting up recess installation plug connector at the end plate up end to make the up end of plug connector not higher than the collection board of battery core group up end, can reduce the height of battery module, make the whole height of battery package of constitution diminish, and then make the battery package that sets up on vehicle chassis highly higher apart from ground, make the vehicle have better trafficability characteristic.

Description

Battery module, battery package and electric automobile

Technical Field

The invention relates to a battery module, a battery pack and an electric automobile.

Background

The power of the electric automobile comes from a battery pack which consists of a plurality of battery cells. In the battery pack, in order to safely and effectively manage hundreds of single battery cells, the battery cells are not randomly placed in a box body of the battery pack, but are orderly placed according to battery modules. The battery module is an intermediate energy storage unit between a battery core monomer and a battery pack, and forms a modular battery pack by connecting a plurality of battery cores in series and in parallel and adding an auxiliary structural member which plays the roles of collecting current, collecting data, fixing and protecting the battery cores and the like.

The existing battery module is characterized in that a plurality of battery cores are arranged along a preset direction to form a battery core group, then end plates are placed at two ends of the battery core group to be used for a reinforcing structure, and the battery core group is supported, fixed and protected. But this kind of battery module will gather the collection subassembly setting of battery core information at the up end of battery core group, because the battery module need transmit the battery core information of gathering for outside monitoring device, this plug connector that just needs a switching, because the plug connector has certain thickness, can make the high increase of battery module with the plug connector setting at the up end of battery core group, and then leads to the high increase of battery package. For the mode that the battery pack is installed on the chassis of the electric vehicle, the height of the vehicle chassis from the ground is limited, the height of the battery pack is increased to reduce the height of the battery pack from the ground, and the battery pack is not favorable for replacing the bottom of the electric vehicle, and replacing the battery pack, so that the battery replacement failure is caused.

Disclosure of Invention

The invention aims to solve the technical problem that the height of a battery pack is reduced from the ground due to the fact that the height of the battery pack is increased, and battery replacement failure caused by the fact that a battery replacement device goes in and out of the bottom of an electric vehicle and the battery pack is replaced is not facilitated.

The invention solves the technical problems through the following technical scheme:

the invention provides a battery module, which comprises a battery core group, a collecting assembly and end plates, wherein the battery core group comprises a plurality of battery cores which are arranged along a preset direction, the collecting assembly comprises a collecting plate and plug connectors, the plug connectors are arranged on the collecting plate, the end plates are arranged at two ends of the battery core group along the arrangement direction of the battery cores, the upper end surface of each end plate is provided with a groove which is sunken towards the bottom of the battery module, the plug connectors are arranged in the grooves, and the upper end surface of each plug connector is not higher than the upper end surface of the collecting plate.

In this scheme, set up recess installation plug connector through the up end at the end plate, and make the up end of plug connector not higher than the collection board of battery core group up end, can reduce the height of battery module, thereby reduce the whole height of battery package, and then make the battery package that sets up on vehicle chassis apart from ground height higher, make the vehicle have better trafficability characteristic, make the battery package can adapt to different motorcycle types, the application scope of battery package has been increased, and conveniently trade the bottom of electrical equipment business turn over electric vehicle and trade the electric service, improve the success rate of trading the electricity, reduce restriction and the cost in trading electrical equipment and place.

Preferably, a first insulating part is arranged between the collecting plate and the end plate;

and/or a second insulating piece is arranged between the end plate and the battery core.

In this scheme, adopt above-mentioned structure, will gather board and end plate through first insulating part and insulate to ensure battery module's electrical property. Avoid the battery core electric leakage to lead to causing the damage to other parts through the end plate through setting up the second insulator, influence the normal use of battery module.

Preferably, the collecting plate is arranged on the upper end face of the battery core group and extends along the arrangement direction of the battery cores, and one end of the collecting plate, provided with the plug connector, is bent downwards from the upper end face of the end plate and extends and is fixed in the groove;

and/or, the battery module includes total positive pole seat and total negative pole seat, total positive pole seat with total negative pole seat is located respectively battery core group both ends in the recess of end plate, total positive pole seat with the upper end of total negative pole seat is not more than gather the up end of board.

In the scheme, by adopting the structure, the acquisition board is arranged on the upper end face of the battery core group and extends along the arrangement direction of the battery cores, so that the information such as voltage, current, temperature and the like of each battery core can be acquired through the acquisition board, and one end of the acquisition board, which is provided with the plug connector, is bent downwards from the upper end face of the end plate and extends and is fixed in the groove, so that the height of the battery module can be reduced, and the overall height of the battery pack is reduced; set up the total positive pole seat and the total negative pole seat of battery module in the recess and make the upper end of total positive pole seat and total negative pole seat no longer than the up end of battery core, reduce the height of battery module, thereby reduce the whole height of battery package, and then make the battery package that sets up on vehicle chassis highly higher apart from ground, make the vehicle have better trafficability characteristic, make the battery package can adapt to different motorcycle types, the application scope of battery package has been increased, and conveniently trade the bottom of electrical equipment business turn over electric vehicle and trade the electric service, improve the success rate of trading the electricity, reduce restriction and the cost in trading electrical equipment and place.

Preferably, the end plate includes two mounting panels that set up along the vertical direction interval in the recess, and connect two the diaphragm at the top of mounting panel, the plug connector is located between two mounting panels and is located the below of diaphragm.

In this scheme, adopt above-mentioned structure for the plug connector has independent installation area, avoids producing with other parts and interferes.

Preferably, the mounting plate and the transverse plate are both provided with mounting holes, and the collecting plate is fixedly connected with the mounting plate and the transverse plate through a first connecting piece.

In this scheme, adopt above-mentioned structure for gather the board and can tightly laminate on battery module, prevent that battery package vibrations from leading to gathering the subassembly and damaging.

Preferably, two ends of the two end plates in the width direction of the battery module are respectively provided with a connecting hole penetrating through the end plates in the height direction of the battery module, and the connecting holes are used for arranging a second connecting piece to fixedly connect the battery module with a battery box body;

and/or the bottom surface of the end plate is higher than the bottom surface of the battery cell;

and/or a plurality of weight reduction grooves are arranged on the end plate.

In the scheme, by adopting the structure, the battery module is connected with the temperature adjusting plate or the bottom plate of the battery box body by arranging the second connecting piece (specifically, the screw) on the end plate, so that the connection strength between the battery module and other parts of the battery pack can be enhanced, and the battery pack is prevented from shaking or moving to influence the normal use of the battery pack; the bottom surface of the end plate is higher than the bottom surface of the battery core, so that the battery module is assembled with the battery box body when being installed in the battery box body; the weight of the battery module can be reduced by arranging the weight reduction grooves on the end plates, so that the weight of the battery pack can be reduced.

Preferably, the upper end surface of the battery core group is provided with an insulating base plate, the insulating base plate extends along the arrangement direction of the battery cores, at least one end of the insulating base plate is connected to the end plate, and the collecting assembly is arranged on the insulating base plate.

In this scheme, adopt above-mentioned structure, set up insulating backing plate at the up end of battery core group to on locating insulating backing plate with the collection subassembly, avoid collection subassembly snap-on to produce the destruction to the battery core on the battery core.

Preferably, a plurality of exhaust holes are formed in the insulating base plate, the exhaust holes correspond to the explosion-proof valves on the battery cores, and hollow structures corresponding to the exhaust holes are formed in the middle of the collecting plate.

In this scheme, adopt above-mentioned structure, explosion-proof valve on the battery core is used for self-bleeding under the too big condition of battery core internal pressure, is provided with a plurality of exhaust holes that correspond with explosion-proof valve on the insulating backing plate and avoids insulating backing plate to influence explosion-proof valve normally to exhaust, and the hollow out construction that the acquisition board set up and correspond with the exhaust hole avoids the acquisition board to be strikeed by explosion-proof valve's exhaust and leads to breaking away from with the battery core.

Preferably, the battery module comprises a plurality of busbars, the busbars are used for connecting the electrodes of two adjacent battery cores, the collecting assembly comprises a plurality of signal collecting pieces, and the signal collecting pieces are in one-to-one correspondence with the busbars and are electrically connected with the busbars.

In this scheme, adopt above-mentioned structure, gather information such as voltage, electric current and the temperature of each battery core through gathering the subassembly, establish ties and/or parallelly connected each battery core through the busbar and make the battery core of battery module form series connection and/or parallel passage, signal acquisition piece and busbar laser welding, the plug connector is connected with external monitoring device, with the various information transfer that the subassembly was gathered for external monitoring device.

Preferably, the collection assembly further comprises a plurality of temperature detectors, the temperature detectors are arranged on the collection plate, a through hole is formed in one end, connected with the collection plate, of the collection sheet, the temperature detectors are located in the through hole, the through hole is provided with an extension portion extending in the vertical direction, and the upper end face of the extension portion is higher than the upper end face of the temperature detectors.

In the scheme, by adopting the structure and arranging the temperature detector to monitor the temperature of the battery core in real time, the problem that the normal use of the battery pack is influenced by overhigh or overlow temperature of the battery core is avoided; in locating the through-hole of gathering the piece with temperature detector, set up the extension that vertical direction extends and make the up end of extension be higher than temperature detector's up end at the through-hole, can protect temperature detector, avoid it to receive external pressure and damage.

Preferably, the outer side surface of the battery core group is provided with a heat conducting film; or the bottom surface of the battery core group is provided with a temperature adjusting plate.

In this scheme, adopt above-mentioned structure, can adjust the temperature of battery module according to the demand, make battery module keep at suitable operating temperature.

The invention also provides a battery pack which comprises the battery module.

In this scheme, adopt the battery package of above-mentioned battery module, whole height is lower for the battery package that sets up on vehicle chassis is higher apart from ground height, makes the vehicle have better trafficability characteristic, makes the battery package can adapt to different motorcycle types, has increased the application scope of battery package, and conveniently trades the bottom of electric vehicle of electrical equipment business turn over and trade the electric service, improves the success rate of trading the electricity, reduces restriction and the cost of trading electrical equipment and place.

Preferably, the battery pack comprises a battery box body and a plurality of battery modules, and the battery modules are connected with the battery box body through second connecting pieces and/or structural adhesive.

In this scheme, battery module is glued through second connecting piece and/or structure and is connected with the battery box, has guaranteed the stability of battery module in the battery box, avoids taking place to rock or remove.

Preferably, the battery pack further comprises a temperature adjusting plate, the temperature adjusting plate is fixed to the bottom of the battery box body, and the battery module is mounted on the temperature adjusting plate.

In this scheme, set up the temperature regulation board in the battery package and can heat or cool down the battery module according to ambient temperature, make whole battery package remain throughout at the optimum temperature, avoid the battery package to take place spontaneous combustion because of the high temperature, or cross the duration that influences electric vehicle because of the temperature is low.

Preferably, the electrodes of two adjacent battery modules are connected through a metal row;

and/or the end plates of two adjacent battery modules are fixed through a third connecting piece.

In the scheme, the electrodes of two adjacent battery modules in the battery box body are connected in series and/or in parallel through the metal bars, the battery modules are connected in series and/or in parallel through the metal bars to form a series and/or parallel passage, and the metal bars can also play a role in connection and fixation to enhance the stability of the battery modules in the battery box body; the both ends of two adjacent battery modules in the battery box are fixed through the connecting piece, strengthen the stability of battery module in the battery box, avoid the battery module to take place to remove in the battery box.

The invention also provides an electric automobile which comprises the battery pack.

The positive progress effects of the invention are as follows:

according to the invention, the plug connector is installed by arranging the groove on the upper end face of the end plate of the battery module, and the upper end face of the plug connector is not higher than the acquisition plate on the upper end face of the battery core group, so that the height of the battery module can be reduced, the overall height of the battery pack is reduced, the height of the battery pack arranged on a vehicle chassis from the ground is higher, the vehicle has better trafficability, the battery pack can adapt to different vehicle types, the application range of the battery pack is enlarged, the battery replacing equipment can conveniently enter and exit from the bottom of the electric vehicle for battery replacing service, the success rate of battery replacing is improved, and the limitation and cost of the battery replacing equipment and a place are reduced.

Drawings

Fig. 1 is a schematic structural diagram of a battery module in embodiment 1 of the present invention.

Fig. 2 is a schematic structural view of the battery module in fig. 1 from another perspective.

Fig. 3 is a plan view of the battery module in fig. 1.

Fig. 4 is a schematic structural view of an end plate in embodiment 1 of the present invention.

Fig. 5 is an enlarged view of a portion a of fig. 1.

Fig. 6 is an enlarged view of a portion B in fig. 1.

Fig. 7 is a schematic view of a structure of a plurality of battery modules in a battery pack according to embodiment 2 of the present invention.

Fig. 8 is an enlarged view of a portion C of fig. 7.

Fig. 9 is a side view of an assembly structure of a plurality of battery modules in the pouch of fig. 7.

Fig. 10 isbase:Sub>A sectional view taken along linebase:Sub>A-base:Sub>A of fig. 9.

Fig. 11 is a cross-sectional view of the battery module in fig. 8 placed in a battery case in the width direction of a battery pack.

Description of reference numerals:

battery core pack 100

Battery cell 110

Bus bar 120

General positive electrode holder 130

Cap 131

General negative pole base 140

End plate 200

First mounting plate 201

Second mounting plate 202

Horizontal plate 203

Mounting hole 204

Connecting hole 205

First region 210

Second region 220

Lightening holes 206

Reinforcing ribs 230

Clamping part 240

Collection assembly 300

Acquisition board 310

Signal acquisition sheet 311

Through-hole 3111

Extension portion 3112

Temperature probe 312

Connector 320

Insulating backing plate 400

Exhaust vent 410

Second connector 500

Binding tie 600

First connector 700

Foam 800

Vertical insulator 900

Battery case 10

Box bottom case 11

Boss 1101

Temperature adjusting plate 20

Flanging 2001

Third connecting member 30

Metal row 40

Detailed Description

The present invention will be more clearly and completely described below by way of examples in conjunction with the accompanying drawings, but the present invention is not limited thereto.

Example 1

As shown in fig. 1 to 6, a battery module according to an embodiment of the present invention includes a battery core group 100, a collecting assembly 300, and an end plate 200, where the battery core group 100 includes a plurality of battery cores 110 arranged in a predetermined direction, the collecting assembly 300 includes a collecting plate 310 and a plug connector 320, the plug connector 320 is disposed on the collecting plate 310, the end plate 200 is disposed at two ends of the battery core group 100 along the arrangement direction of the battery cores 110, an upper end surface of the end plate 200 has a groove recessed toward a bottom of the battery module, the plug connector 320 is installed in the groove, and an upper end surface of the plug connector 320 is not higher than an upper end surface of the collecting plate 310. Through set up recess installation plug connector 320 at the up end of end plate 200, and make the up end of plug connector 320 not be higher than the collection board 310 of the 100 up end of battery core group, can reduce the height of battery module, thereby reduce the whole height of battery package, make the battery package that sets up on vehicle chassis highly higher apart from ground, make the vehicle have better trafficability characteristic, make the battery package can adapt to different motorcycle types, the application scope of battery package has been increased, and conveniently trade the bottom of electric equipment business turn over electric vehicle and trade the electric service, improve the success rate of trading the electricity, reduce restriction and the cost in trade electric equipment and place.

In the present embodiment, the Flexible Printed Circuit (FPC) is used as the acquisition board 310, and the Flexible Printed Circuit has excellent characteristics of light weight, thin thickness, free bending and folding, and the like. The end plate 200 is made of aluminum. Preferably, a first insulating member is disposed between the collecting plate 310 and the end plate 200, and the collecting plate 310 is insulated from the end plate 200 by the first insulating member, so as to ensure the electrical performance of the battery module.

As shown in fig. 1 to 3, in the present embodiment, the collecting plate 310 is disposed on the upper end surface of the battery core pack 100 and extends along the arrangement direction of the battery cores 110, and one end of the collecting plate 310, on which the plug 320 is disposed, is bent downward from the upper end surface of the end plate 200 and fixed in the groove. The collecting plate 310 is disposed on the upper end surface of the battery core pack 100 and extends along the arrangement direction of the battery cores 110 so as to collect information on the voltage, current, temperature, etc. of each battery core 110 through the collecting plate 310.

Preferably, the first insulating member includes foam 800 (polyurethane), which is easily broken at a bent portion due to the adoption of FPC for the collecting plate 310, and the foam 800 (polyurethane) is disposed between the collecting plate 310 and the end plate 200 and the battery core pack 100 at the bent portion of the collecting plate 310 to protect the bent portion of FPC and insulate from the end plate 200 of aluminum.

As shown in fig. 4, in the present embodiment, the end plate 200 includes a first mounting plate 201 and a second mounting plate 202 spaced apart from each other in the vertical direction in the recess, the top portions of the first mounting plate 201 and the second mounting plate 202 are connected by a transverse plate 203, and the plug 320 is located between the two first mounting plates 201 and the second mounting plate 202 and below the transverse plate 203. With the above structure, the plug 320 has an independent installation area, and interference with other components is avoided. The first and second mounting plates 201 and 202 divide the groove into a first region 210 between the two mounting plates and second regions 220 located at both sides of the first region 210, and the plug 320 is provided in the first region 210 of the end plate 200 at one end of the battery core pack 100.

The first mounting plate 201, the second mounting plate 202 and the transverse plate 203 are all provided with mounting holes 204, and the collecting plate 310 is fixedly connected with the first mounting plate 201, the second mounting plate 202 and the transverse plate 203 through a first connecting piece 700. The end of the collecting plate 310 provided with the plug-in connector 320 is bent downwards along the upper end surface of the transverse plate 203 and fixed in the first region 210. Adopt above-mentioned structure for gather board 310 can tightly laminate on battery module, prevent that battery package vibrations from resulting in gathering subassembly 300 and damaging.

Specifically, the foam 800 (polyurethane) is disposed at the bent portion of the collecting plate 310 and at least a portion of the foam 800 contacts the horizontal plate 203, and the collecting plate 310 and the foam 800 are connected to the horizontal plate 203 through the first connecting member 700. The plug 320 and the foam 800 are connected to the first mounting board 201 and the second mounting board 202 by the first connector 700.

The first insulating member includes a vertical insulating member 900 disposed between the downward-bent collecting plate 310 and the first and second mounting plates 201 and 202, the vertical insulating member 900 is used to support the first connecting member 700 and insulate the end plate 200, and the collecting plate 310 and the vertical insulating member 900 are connected to the first and second mounting plates 201 and 202 through the first connecting member 70. Preferably, the vertical insulating member 900 is made of plastic.

In this embodiment, the first connector 700 is a screw, preferably a plastic screw.

The battery module comprises a total positive electrode base 130 and a total negative electrode base 140, the total positive electrode base 130 and the total negative electrode base 140 are respectively arranged in the grooves of the end plates 200 at the two ends of the battery core group 100, and the upper ends of the total positive electrode base 130 and the total negative electrode base 140 do not exceed the upper end surface of the collecting plate 310. Set up total positive pole seat 130 and total negative pole seat 140 of battery module in the recess and make total positive pole seat 130 and total negative pole seat 140's upper end no longer than battery core 110's up end, reduce the height of battery module, thereby reduce the whole height of battery package, and then make the battery package that sets up on vehicle chassis increase apart from ground height, make the vehicle have better trafficability characteristic, make the battery package can adapt to different motorcycle types, the application scope of battery package has been increased, and conveniently trade the bottom of battery equipment business turn over electric vehicle and trade the electric service, improve the success rate of trading the electricity, reduce restriction and the cost of trading battery equipment and place. Specifically, the total positive electrode holders 130 and the total negative electrode holders 140 are respectively disposed in the second regions 220 of the two end plates 200 at both ends of the battery core pack 100.

As shown in fig. 5, the total positive electrode holder 130 and the total negative electrode holder 140 are respectively provided with a cap 131, and the wire connectors of the total positive electrode holder 130 and the total negative electrode holder 140 are located below the cap 131. Through set up block 131 on total positive pole seat 130 and total negative pole seat 140, avoid other electrically conductive objects to bump with total positive pole seat 130 and total negative pole seat 140's connector lug mistake and lead to taking place the short circuit to can also avoid total positive pole seat 130 and total negative pole seat 140's connector lug to pollute and influence normal use.

As shown in fig. 4, in the present embodiment, the two end plates 200 at the two ends of the width direction of the battery module are respectively provided with a connection hole 205 penetrating through the end plate 200 along the height direction of the battery module, and the connection hole 205 is used for providing a second connection member 500 to fixedly connect the battery module with the battery box. Through set up second connecting piece 500 on end plate 200 and connect the bottom plate of thermoregulation board or battery box, can strengthen the joint strength of battery module and other parts of battery package, avoid it to take place to rock or remove the normal use that influences the battery package. Preferably, the second connector 500 is a screw.

In the present embodiment, the bottom surface of the end plate 200 is higher than the bottom surface of the battery cell 110. The bottom surface of the end plate 200 is higher than the bottom surface of the battery cell 110 so as to be easily assembled with the battery case when the battery module is mounted in the battery case.

The end plate 200 is provided with a plurality of lightening holes 206 at the portions where the coupling holes 205 are provided to reduce the weight of the battery module, so that the weight of the battery pack can be reduced. The end surface of the end plate 200 on the side away from the battery core pack 100 is further provided with reinforcing ribs 230 to increase the strength of the end plate 200. The end plate 200 is further provided with a clamping portion 240 at the junction of the reinforcing ribs 230, in this embodiment, the clamping portion 240 is a circular hole structure for clamping by the robot so that the robot can move the battery module.

As shown in fig. 1 to 3, the upper end surface of the battery core pack 100 is provided with an insulating pad 400, the insulating pad 400 extends along the arrangement direction of the battery cores 110, at least one end of the insulating pad 400 is connected to the end plate 200, and the collecting assembly 300 is disposed on the insulating pad 400. The insulating base plate 400 is disposed on the upper end surface of the battery core pack 100, and the collecting assembly 300 is disposed on the insulating base plate 400, thereby preventing the collecting assembly 300 from being directly fixed on the battery core 110 to damage the battery core 110.

The insulating base plate 400 is provided with a plurality of vent holes 410, the vent holes 410 are arranged corresponding to the explosion-proof valves on the battery cells 110, and the middle of the collecting plate 310 is provided with a hollow structure corresponding to the vent holes 410. The explosion-proof valve on the battery core 110 is used for automatically exhausting air under the condition that the internal pressure of the battery core 110 is overlarge, the insulating base plate 400 is provided with a plurality of exhaust holes 410 corresponding to the explosion-proof valve to prevent the insulating base plate 400 from influencing the normal exhaust of the explosion-proof valve, and the acquisition plate 310 is provided with a hollow structure corresponding to the exhaust holes 410 to prevent the acquisition plate 310 from being separated from the battery core 110 due to the exhaust impact of the explosion-proof valve.

As shown in fig. 1 to 3, the battery module includes a plurality of bus bars 120, the bus bars 120 are used for connecting electrodes of two adjacent battery cores 110, the collecting assembly 300 includes a plurality of signal collecting pieces 311, and the plurality of signal collecting pieces 311 are in one-to-one correspondence with and electrically connected to the plurality of bus bars 120. The battery module collects information such as voltage, current and temperature of each battery cell 110 through the collection assembly 300, the battery cells 110 of the battery module form a serial and/or parallel path by connecting the battery cells 110 in series and/or in parallel through the bus bar 120, the signal collection sheet 311 is welded with the bus bar 120 by laser, the plug connector 320 is connected with an external monitoring device, and various information collected by the collection assembly 300 is transmitted to the external monitoring device. Considering the cost, the bus bar 120 is preferably an aluminum bar, and may be made of a copper bar or other material with better conductivity. The signal collecting sheet 311 may be made of nickel or aluminum. In the present embodiment, the battery cells 110 in the battery core pack 100 are connected in series by the bus bar 120, that is, the positive electrodes and the negative electrodes of two adjacent battery cells 110 are connected in series by the bus bar 120. Of course, the battery cells 110 in the battery core pack 100 may be connected in parallel or in series-parallel by the bus bars 120, which is not limited herein.

As shown in fig. 6, in the present embodiment, the collecting assembly 300 further includes a plurality of temperature detectors 312, the temperature detectors 312 are disposed on the collecting plate 310, a through hole 3111 is formed at one end of the collecting plate connected to the collecting plate 310, the temperature detectors 312 are located in the through hole 3111, the through hole 3111 has an extending portion 3112 extending in the vertical direction, and an upper end surface of the extending portion 3112 is higher than an upper end surface of the temperature detectors 312. The temperature of the battery core 110 is monitored in real time by the temperature detector 312, so that the normal use of the battery pack is prevented from being influenced by overhigh or overlow temperature of the battery core 110; locate temperature detector 312 in the through-hole 3111 of gathering the piece, set up the extension 3112 of vertical direction extension and make the up end of extension 3112 be higher than temperature detector 312's up end at through-hole 3111, can protect temperature detector 312, avoid it to receive external pressure and damage.

In the present embodiment, a second insulating member (not shown) is provided between the end plate 200 and the battery cell 110. The second insulating member is arranged to prevent the battery cell 110 from being damaged by the end plate 200 due to leakage of electricity, thereby preventing the normal use of the battery module from being affected.

The second insulating member is a plate-shaped structure, and the second insulating member, the end plate 200 and the battery core 110 are respectively bonded and fixed through structural adhesive. The second insulating member is fixed to the end plate 200 and the battery cell 110 by the structural adhesive, so that the second insulating member is firmly bonded to the end plate 200 and the battery cell 110, and the second insulating member is prevented from being separated from the end plate 200 and the battery cell 110. Preferably, the upper end of the second insulating member is bent toward the upper end surface of the battery cell 110 and attached to the upper end surface of the battery cell 110, and/or the lower end of the second insulating member is bent toward the lower end surface of the battery cell 110 and attached to the lower end surface of the battery cell 110. The upper end surface and the lower end surface of the battery core 110 are protected by the second insulating part, and the end part of the battery core 110 is prevented from being collided and damaged.

As shown in fig. 1 to 2, the battery module further includes a binding band 600, the plurality of battery cells 110 are adhered by structural adhesive, and the binding band 600 is used to surround the outer circumferential side of the battery module to bind the battery cells 110 and the end plates 200. The battery module is fixed by the binding band 600, and the connection stability between the battery cells 110 of the battery module is further enhanced. In this embodiment, the binding band 600 is a steel band structure.

In some embodiments, the outer side of the battery core pack 100 is provided with a thermal conductive film, or the bottom of the battery core pack 100 is provided with a temperature-adjusting plate. By adopting the structure, the temperature of the battery module can be adjusted according to the requirement, so that the battery module is kept at a proper working temperature.

Example 2

As shown in fig. 7 to 11, the present embodiment provides a battery pack using the battery module according to embodiment 1. Adopt the battery package of above-mentioned battery module, whole height reduces for the battery package that sets up on vehicle chassis increases apart from ground height, makes the vehicle have better trafficability characteristic, makes the battery package can adapt to different motorcycle types, has increased the application scope of battery package, and conveniently trades the bottom of electrical equipment business turn over electric vehicle and trade electric service, improves the success rate of trading the electricity, reduces restriction and the cost of trading electrical equipment and place.

The battery pack comprises a battery box body 10 and a plurality of battery modules, and the battery modules are connected with the battery box body 10 through a second connecting piece 500 and/or structural adhesive. The battery module is glued through second connecting piece 500 and/or structure and is connected with battery box 10, has guaranteed the stability of battery module in battery box 10, avoids taking place to rock or remove. The battery box 10 includes a box bottom case 11, and the box bottom case 11 has a receiving chamber in which a plurality of battery modules are disposed.

In this embodiment, the battery pack further includes a temperature adjustment plate 20, the temperature adjustment plate 20 is fixed at the bottom of the bottom case 11 of the case, and the battery module is mounted on the temperature adjustment plate 20. As shown in fig. 11, bosses 1101 are provided on the periphery of the bottom of the cabinet bottom 11, flanges 2001 are provided on the periphery of the temperature-adjusting plate 20, structural adhesive is filled between the bottom of the temperature-adjusting plate 20 and the bottom of the cabinet bottom 11 for fixation, the lower end faces of the flanges 2001 are abutted against the upper end faces of the bosses 1101, and the flanges 2001 and the bosses 1101 are also fixed by the structural adhesive.

Set up temperature regulating plate 20 in the battery package, can heat or cool down the battery module according to ambient temperature, make whole battery package remain throughout at suitable temperature, avoid the battery package to take place the spontaneous combustion because of the high temperature, or cross low duration that influences electric vehicle because of the temperature. In the present embodiment, the temperature adjustment plate 20 is a water-cooling plate.

In this embodiment, the second connecting member 500 is a screw, the battery module is fixed to the temperature-adjusting plate 20 by the screw, and the temperature-adjusting plate 20 is fixed to the bottom case 11 by the structural adhesive, so as to fixedly connect the battery module to the battery case 10.

In this embodiment, the electrode of two adjacent battery module passes through metal bar 40 to be connected, and the battery module passes through metal bar 40 to be connected not only makes a plurality of battery module in the battery package form the electric current route, can also make and drag each other between a plurality of battery module and avoid single battery module fixed not firm emergence to rock. In the present embodiment, a plurality of battery modules are connected in series through the metal bars 40, and as shown in fig. 8, the total positive electrode holders 130 and the total negative electrode holders 140 of two adjacent battery modules are connected in series through the metal bars 40. The metal bar 400 is made of a conductive material, preferably copper, and may be aluminum. In other embodiments, a plurality of battery modules are connected in parallel or in series-parallel through the metal bars 40.

In the present embodiment, the end plates 200 of adjacent two battery modules are fixed by the third connection member 30. The end plate 200 at the same side of the two adjacent battery modules is provided with a connecting hole 205, the two ends of the third connecting piece 30 are provided with through holes corresponding to the connecting holes 205 on the two adjacent battery modules, and the two adjacent battery modules are fixedly connected with the temperature adjusting plate 20 through the second connecting piece 500 sequentially passing through the through holes of the third connecting piece 30 and the connecting holes 205 of the end plate 200, so that the two adjacent battery modules are fixedly connected with each other through the third connecting piece 30. The third connecting member 30 may be a metal sheet or a plastic plate. The both ends of two adjacent battery module in the battery box 10 are fixed through third connecting piece 30, strengthen the stability of battery module in battery box 10, avoid the battery module to take place to remove in battery box 10.

The embodiment also discloses an electric automobile, and the electric automobile adopts the battery pack.

Electric automobile adopts foretell battery package, and the whole height of battery package reduces, and the battery package on the vehicle chassis increases apart from ground height, makes the vehicle have better trafficability characteristic for the battery package can adapt to different motorcycle types, has increased the application scope of battery package, and conveniently trades the bottom of electric vehicle of battery equipment business turn over and trade the electric service, improves the success rate of trading the electricity, reduces restriction and the cost of trading battery equipment and place.

While specific embodiments of the invention have been described above, it will be understood by those skilled in the art that this is by way of example only, and that the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the spirit and scope of the invention, and these changes and modifications are within the scope of the invention.

Claims (16)

1. The utility model provides a battery module, includes battery core group, collection subassembly and end plate, battery core group includes a plurality of battery cores of arranging along the predetermined direction, it includes collection board and plug connector to gather the subassembly, the plug connector sets up gather on the board, its characterized in that, the end plate sets up battery core group along the both ends of the arrangement direction of battery core, the up end of end plate have to the recess of the undercut of battery module, the plug connector is installed in the recess, the up end of plug connector is not higher than gather the up end of board.

2. The battery module according to claim 1, wherein a first insulating member is disposed between the collecting plate and the end plate;

and/or a second insulating piece is arranged between the end plate and the battery core.

3. The battery module according to claim 1, wherein the collecting plate is disposed on the upper end surface of the battery core pack and extends along the arrangement direction of the battery cores, and one end of the collecting plate, at which the plug connector is disposed, is bent downward from the upper end surface of the end plate and is fixed in the groove;

and/or, the battery module includes total positive pole seat and total negative pole seat, total positive pole seat with total negative pole seat is located respectively battery core group both ends in the recess of end plate, total positive pole seat with the upper end of total negative pole seat is not more than gather the up end of board.

4. The battery module of claim 1, wherein the end plate includes two mounting plates spaced apart vertically within the recess and a cross plate connecting the tops of the two mounting plates, the connector being located between the two mounting plates and below the cross plate.

5. The battery module as set forth in claim 4, wherein the mounting plate and the transverse plate are provided with mounting holes, and the collecting plate is fixedly connected with the mounting plate and the transverse plate through first connecting members.

6. The battery module according to claim 1, wherein the two end plates at the two ends of the battery module in the width direction are respectively provided with a connecting hole penetrating through the end plates in the height direction of the battery module, and the connecting holes are used for providing a second connecting member for fixedly connecting the battery module with a battery case;

and/or the bottom surface of the end plate is higher than the bottom surface of the battery cell;

and/or a plurality of weight reduction grooves are arranged on the end plate.

7. The battery module according to claim 1, wherein the upper end surface of the battery core pack is provided with an insulating pad plate extending in the arrangement direction of the battery cores, at least one end of the insulating pad plate is connected to the end plate, and the collecting member is provided on the insulating pad plate.

8. The battery module according to claim 7, wherein the insulating pad is provided with a plurality of vent holes, the vent holes are arranged corresponding to the explosion-proof valves on the battery cells, and the middle of the collecting plate is provided with a hollow structure corresponding to the vent holes.

9. The battery module according to claim 1, wherein the battery module comprises a plurality of bus bars for connecting electrodes of two adjacent battery cells, and the collecting assembly comprises a plurality of signal collecting pieces, and the plurality of signal collecting pieces are in one-to-one correspondence with and electrically connected with the plurality of bus bars.

10. The battery module according to claim 9, wherein the collecting assembly further comprises a plurality of temperature detectors, the temperature detectors are disposed on the collecting plate, one end of the collecting plate, which is connected to the collecting plate, is provided with a through hole, the temperature detectors are located in the through holes, the through holes are provided with extending portions extending in a vertical direction, and upper end surfaces of the extending portions are higher than upper end surfaces of the temperature detectors.

11. The battery module according to claim 1, wherein the outer side of the battery core pack is provided with a thermally conductive film; or the bottom surface of the battery core group is provided with a temperature adjusting plate.

12. A battery pack comprising the battery module according to any one of claims 1 to 11.

13. The battery pack according to claim 12, wherein the battery pack comprises a battery case and a plurality of the battery modules, and the battery modules are connected with the battery case by second connecting members and/or structural adhesives.

14. The battery pack according to claim 13, further comprising a temperature-adjusting plate fixed to the bottom of the battery case, wherein the battery module is mounted on the temperature-adjusting plate.

15. The battery pack according to claim 12, wherein the electrodes of adjacent two of the battery modules are connected by a metal row;

and/or the end plates of two adjacent battery modules are fixed through a third connecting piece.

16. An electric vehicle comprising the battery pack according to any one of claims 12 to 15.

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