CN114824621A

CN114824621A - Battery module

Info

Publication number: CN114824621A
Application number: CN202110125878.8A
Authority: CN
Inventors: 毛松; 彭升政
Original assignee: Kunshan Ju Innovative Energy Technology Co Ltd
Current assignee: Kunshan Ju Innovative Energy Technology Co Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2022-07-29

Abstract

The invention discloses a battery module, which comprises a bus bar, a laminated body, a shell, an end support, an electrode protective cover and a bus bar protective shell. The lamination body has the utmost point ear of stretching out to both ends, be equipped with in the casing and hold the chamber, casing bottom is equipped with heat conduction support piece towards the lamination body, heat conduction support piece extends along the length direction of casing, two end support are located the both sides that hold the chamber respectively, set up on two end support and hold the guiding hole of chamber intercommunication, the busbar is connected in one side of end support, the busbar quantity of establishing at first end support is more than the busbar quantity of establishing at second end support, utmost point ear stretches out and is connected with the busbar from the guiding hole, keeping away from of first end support and holding a chamber side is all connected to two electrode visor, be equipped with two first holes of dodging on the first busbar protective housing, two electrode visor stretch out to two first holes of dodging respectively. The battery module provided by the embodiment of the invention has the advantages of wide application range, quick assembly and disassembly, convenience and good insulation property.

Description

Battery module

Technical Field

The invention belongs to the technical field of battery production and manufacturing, and particularly relates to a battery module.

Background

In the current society, along with the improvement of environmental protection consciousness of people, more and more people choose to buy the new energy automobile with low energy consumption, and the new energy automobile mainly uses electric energy as main power source.

The new energy automobile can be divided into a pure electric automobile and a hybrid electric automobile, but no matter which one is used, the battery module can not be used for providing power for the new energy automobile. The battery module generally comprises a shell, an electric core, busbars and other structures, wherein the electric core is arranged inside the shell, the shell has certain thickness, the heat generated by the electric core in the working process can not be rapidly dissipated, the heat dissipation speed of the electric core is reduced, a plurality of groups of electric cores are electrically connected through the busbars, and in order to ensure the insulation between the electric core and the busbars, a tip support is usually arranged between the electric core and the busbars, but the tip support is arranged between the electric core and the busbars, the connection speed of the electric core and the busbars can be reduced by the tip support in the process of connecting lugs on the electric core and the busbars, the assembly efficiency is further reduced, in the prior art, positive and negative protective covers of the battery module are respectively arranged on different tip supports, when current is led out, the circuit arrangement is far, the wiring between different battery modules is complex, the wiring in a vehicle body is difficult, the wiring is difficult, the assembly efficiency is low, and the cost is reduced, The routing occupies more space.

Disclosure of Invention

The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides the battery module, the positive and negative protective covers of the battery module are arranged on the same end support, so that the subsequent connection between the battery modules is facilitated, the heat dissipation speed is high, and the technical problems that the heat dissipation speed of the battery module is low, the circuit arrangement is far when current is led out outwards, the connection is complex, the wiring is difficult, and the wiring occupies more space in the prior art are solved.

A battery module according to an embodiment of the present invention includes: a plurality of busbars; the laminated sheet bodies are arranged in a plurality of groups, and each group of laminated sheet bodies is provided with tabs extending towards two ends; the laminated body comprises a shell, wherein a containing cavity for containing a plurality of groups of laminated bodies is formed in the shell, a plurality of heat conduction supporting pieces are arranged at the bottom of the shell towards the laminated bodies, the bottom of each heat conduction supporting piece is connected with the bottom wall of the shell, the top of each heat conduction supporting piece is abutted against the laminated body, and the heat conduction supporting pieces extend along the length direction of the shell; the first end support and the second end support are respectively positioned at two sides of the accommodating cavity, the first end support and the second end support are respectively arranged at intervals with the heat-conducting supporting piece, a plurality of guide holes communicated with the accommodating cavity are formed in the first end support and the second end support, the bus bars are connected to one side of the end supports, which is far away from the accommodating cavity, and the number of the bus bars arranged on the first end support is more than that of the bus bars arranged on the second end support; the lug extends out of the guide hole and is connected with the bus bar; the two electrode protection covers are connected to one side face, far away from the accommodating cavity, of the first end support; the first busbar protective shell is connected to one side face, away from the accommodating cavity, of the first end support, two first avoidance holes are formed in the first busbar protective shell, and the two electrode protective covers extend out of the two first avoidance holes respectively; and the second busbar protective shell is connected to one side surface, far away from the accommodating cavity, of the second end support.

According to the battery module provided by the embodiment of the invention, the accommodating cavity for accommodating the multiple groups of laminated sheets is formed in the shell, and the multiple groups of laminated sheets are placed in the accommodating cavity, so that the battery capacity of a single battery module is increased. The casing can play the effect of protection lamination body, improves the security of lamination body, and is equipped with a plurality of heat conduction support piece between the bottom of casing and the lamination body, and heat conduction support piece still can inject the position of lamination body when improving lamination body radiating rate, guarantees stable in position between the many groups of lamination bodies, and when using battery module, can not collide each other between the multiunit lamination body. Set up first end support and second end support in the both sides that hold the chamber, two end supports with hold the chamber cooperation and have restricted the biggest displacement distance of multiunit lamination, further improve the position stability of lamination in the casing, also make things convenient for the electric core assembly to hold in the chamber. The tabs extending out of the laminated body towards the two ends can be quickly connected with the bus bar through the guide holes in the end support, so that the connection efficiency is improved; two electrode visor are connected on same tip support, and are equipped with the first hole of dodging the electrode visor on the first protective housing of arranging, in the in-process of subsequently connecting a plurality of battery module, can reduce the wiring degree of difficulty between the different battery module, make the wiring between each battery module comparatively simple, and walk the line occupation space few, improve the practicality of battery module box subassembly.

According to the battery module, each group of laminated bodies comprises a plurality of soft package batteries, each soft package battery is provided with a battery supporting part extending towards the bottom wall in a bending mode, one heat conduction supporting part is connected between every two adjacent battery supporting parts, and the upper parts of the heat conduction supporting parts are respectively abutted against the two soft package batteries.

Optionally, the heat-conducting supporting member includes a first supporting body, a second supporting body and a third supporting body, the first supporting body and the second supporting body are connected in a step shape, the battery supporting portion is connected between the second supporting body and the first supporting body, and the bottom of the first supporting body is connected to the bottom wall; the third support body is connected on the upper portion of the second support body, and the third support body is supported between two sets of the side faces of the soft package battery.

According to the battery module provided by the embodiment of the invention, the battery module further comprises a plurality of buffer foam, and the plurality of buffer foam are respectively arranged between the laminated body and the shell and between the two groups of laminated bodies; when two be equipped with the buffering bubble cotton between the lamination body, the cooperation groove has been seted up at heat conduction support piece's top, the cotton embedding of buffering bubble in the cooperation groove.

According to the battery module provided by the embodiment of the invention, the first busbar protective shell is provided with a plurality of first clamping holes around the first avoidance hole, the electrode protective covers are respectively provided with a plurality of buckles, and the buckles are clamped and matched with the first clamping holes.

Optionally, the battery module still includes the FPC board, the FPC board is connected first end support is kept away from hold one side in chamber, be equipped with the second on the first protective housing of dodging, the second dodges the hole and is located two first dodging between the hole, the partial structure of FPC board stretches into the hole department is dodged to the second, the FPC board respectively with on the first end support the busbar is connected.

According to the battery module of one embodiment of the invention, the first avoidance hole is formed in the upper portion of the first end support, the lower portion of the first end support extends out towards the first busbar protective shell to form the positioning insertion plate, the bottom of the first busbar protective shell is provided with the plurality of first clamping legs, the plurality of first clamping legs surround the positioning insertion groove, and when the positioning insertion plate is inserted into the positioning insertion groove, the first clamping legs abut against the positioning insertion plate.

Optionally, a plurality of second clamping pins are arranged on one side surface, facing the first busbar protective shell, of the first end support, a plurality of second clamping holes are formed in the first busbar protective shell, and the second clamping pins are clamped in the second clamping holes; and the clamping directions of the second clamping pins are different.

Optionally, the casing includes a top casing, a bottom casing, two side casings and two end casings, one end of each of the two side casings is connected to the bottom casing, the other end of each of the two side casings is connected to the top casing, and both ends of the top casing are respectively abutted to the first end bracket and the second end bracket, wherein one of the end casings is connected to a side of the first collecting protective casing away from the first end bracket, and the other end casing is connected to a side of the second collecting protective casing away from the second end bracket; the side shell is provided with a first socket, the end shell is provided with a second socket, the side part of the end part support is provided with a plug-in buckle, and the plug-in buckle is sequentially matched with the first socket and the second socket in a plug-in mode.

Optionally, a plurality of first heat dissipation holes are formed in the first bus protection shell, and the sum of the flow areas of the first heat dissipation holes from the middle to the two sides is gradually reduced; the end shell is provided with a plurality of second radiating holes, and the flow area of the second radiating holes is larger than that of the first radiating holes.

Additional aspects and advantages of the invention will be set forth 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 an exploded view of the housing, end brackets and bussing containment vessel of one embodiment of the present invention.

Fig. 2 is a perspective view of a first end bracket according to an embodiment of the invention.

Fig. 3 is a partial enlarged view of region i in fig. 1.

Fig. 4 is an exploded view of a plurality of sets of laminations and a housing according to one embodiment of the invention.

Fig. 5 is a schematic perspective view of the first end bracket connected to the electrode protection cover according to an embodiment of the invention.

Fig. 6 is a perspective view of a second end bracket according to an embodiment of the invention.

Fig. 7 is a schematic view of a plurality of lamination stacks disposed in a housing according to an embodiment of the present invention.

Fig. 8 is a partially enlarged view of the area ii in fig. 7.

Fig. 9 is an exploded view of a first end bracket and a first bussing arm according to one embodiment of the invention.

Fig. 10 is an exploded view of the housing and bussing containment of one embodiment of the present invention.

Fig. 11 is a partially enlarged view of region iii in fig. 10.

Reference numerals:

100. a battery module;

1. a bus bar;

2. stacking the sheets;

21. a tab;

22. a pouch cell; 221. a battery support part;

3. a housing;

31. an accommodating chamber; 311. a first opening; 312. a second opening;

33. a top shell;

34. a bottom case; 35. a side casing; 351. a first socket;

36. an end housing; 361. a second socket; 362. a second heat dissipation hole;

4. a first end bracket;

41. a first guide hole; 42. positioning the plug board; 43. a second clamping pin;

44. a first eye-splice;

45. a partition rib; 451. an inner concave cavity;

46. a guide channel;

47. a first clamping rib; 48. a first clamping cavity;

5. a second end bracket; 52. a second eye-splice; 53. a second clamping rib; 54. a second clamping cavity;

6. an electrode protection cover; 61. buckling;

7a, a first busbar protective shell;

71. a first avoidance hole; 72. a first card hole; 73. a claw;

74. a first clamping pin; 75. positioning the slot; 76. a second card hole; 77. a first heat dissipation hole;

7b, a second bus protection shell;

8. a thermally conductive support;

81. a first support; 82. a second support; 83. a third support;

9. buffering foam;

10. an FPC board.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "lateral," "length," "thickness," "upper," "lower," "top," "bottom," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for the purpose of convenience and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated in a particular manner, and are not to be construed as limiting the present invention.

The battery module 100 according to the embodiment of the present invention will be described with reference to the accompanying drawings.

A battery module 100 according to an embodiment of the present invention, as shown in fig. 1, includes: the electrode assembly comprises a plurality of busbars 1, a plurality of sets of laminated stacks 2, a housing 3, a first end support 4, a second end support 5, two electrode protection covers 6, a first busbar protection casing 7a and a second busbar protection casing 7 b.

As shown in fig. 3, each group of lamination bodies 2 has tabs 21 protruding from both ends.

As shown in fig. 1, a housing chamber 31 for housing the plurality of stacked sheet bodies 2 is provided in the housing 3. That is, a plurality of sets of the stacked sheets 2 can be accommodated in the accommodating chamber 31 at the same time.

As shown in fig. 3 and 4, the bottom of the housing 3 is provided with a plurality of heat conducting supporting members 8 facing the laminated body 2, the bottom of the heat conducting supporting members 8 is connected to the bottom wall of the housing 3, the top of the heat conducting supporting members 8 abuts against the laminated body 2, and the heat conducting supporting members 8 extend along the length direction of the housing 3. That is to say, be provided with a plurality of heat conduction support piece 8 between lamination body 2 and the casing 3 bottom, the diapire at casing 3 is connected to a plurality of heat conduction support piece 8's one end, and the other end butt lamination body 2 of a plurality of heat conduction support piece 8.

As shown in fig. 1, the first end bracket 4 and the second end bracket 5 are respectively located at both sides of the accommodating chamber 31, and the first end bracket 4 and the second end bracket 5 are respectively spaced apart from the heat conductive support member 8. Here, the heat conductive support member 8 is extended along the length direction of the housing 3 but the length of the heat conductive support member 8 is smaller than the length of the housing 3.

A plurality of guide holes communicated with the accommodating cavity 31 are formed in the first end support 4 and the second end support 5, the bus bars 1 are connected to one side of the end support far away from the accommodating cavity 31, and as shown in fig. 5 and 6, the number of the bus bars 1 arranged on the first end support 4 is greater than that of the bus bars 1 arranged on the second end support 5. That is, the first end bracket 4 and the second end bracket 5 have different structures, two molds are required to be separately produced in the actual production process for manufacturing the first end bracket 4 and the second end bracket 5, and the first end bracket 4 and the second end bracket 5 are not mixed.

The tab 21 protrudes from the guide hole and is connected to the bus bar 1.

As shown in fig. 1, two electrode protection covers 6 are each connected to a side of the first end carrier 4 remote from the receiving space 31. That is, both electrode protection covers 6 in the present application are provided on the first end support 4, and the electrode protection covers 6 are not provided on the second end support 5.

As shown in fig. 1, the first busbar protective housing 7a is connected to a side surface of the first end bracket 4 away from the accommodating cavity 31, two first avoidance holes 71 are formed in the first busbar protective housing 7a, and the two electrode protective covers 6 extend out of the two first avoidance holes 71 respectively.

The second protective bus bar 7b is connected to a side of the second end bracket 5 remote from the receiving chamber 31.

As can be seen from the above structure, in the battery module 100 according to the embodiment of the present invention, the tabs 21 extending to both ends are provided on each set of the laminated plates 2, and the tabs 21 are connected to the bus bars 1, so as to realize series connection or parallel connection between the laminated plates 2.

The multiple groups of laminated bodies 2 are arranged in the accommodating cavity 31, so that the battery capacity of a single battery module 100 is increased, and when the battery module 100 is impacted, the shell 3 collapses to absorb energy and absorbs a part of impact force by using the strength and rigidity of the shell, so that the damage of the impact force to the laminated bodies 2 is reduced; the accommodating cavity 31 provides an installation space for the plurality of groups of laminated bodies 2, limits the maximum moving position of the laminated bodies 2, prevents the laminated bodies 2 from being damaged by self due to dislocation movement when the battery module 100 is impacted, prolongs the service life of the laminated bodies 2, and improves the safety of the laminated bodies 2.

The plurality of heat conduction supporting pieces 8 are arranged between the lamination bodies 2 and the bottom of the shell 3, on one hand, the plurality of heat conduction supporting pieces 8 can play a role in fixing the lamination bodies 2 and provide a certain damping effect for the plurality of groups of lamination bodies 2, so that the plurality of groups of lamination bodies 2 are stable in position in the accommodating cavity 31, and in the using process of the battery module 100, the plurality of groups of lamination bodies 2 and the bottom wall of the shell 3 cannot collide with each other, so that the damage to the lamination bodies 2 is reduced, and the service life of the battery module 100 is prolonged; on the other hand, the heat conducting supporting members 8 can transfer the heat generated by the laminated body 2 during operation to the bottom wall of the housing 3 and dissipate the heat, thereby increasing the heat dissipation speed of the laminated body 2.

The first end support 4 and the second end support 5 are arranged on two sides of the accommodating cavity 31, and as the accommodating cavity 31 accommodates a plurality of groups of laminated bodies 2, the first end support 4 and the second end support 5 can play a role in limiting the positions of the laminated bodies 2, so that the laminated bodies 2 are stable in the accommodating cavity 31, and the battery cell 2 is conveniently assembled in the accommodating cavity 31; on the other hand, the first end bracket 4 and the second end bracket 5 are usually made of an insulating material, so that the first end bracket 4 and the second end bracket 5 can perform an insulating function, and the safety among the lamination body 2, the bus bar 1 and the housing 3 is improved.

Because of first end support 4 and second end support 5 set up the both sides that hold chamber 31 and with fold lamellar body 2 contact, if set first end support 4 and second end support 5 to contact with heat conduction support piece 8, then heat conduction support piece 8 is when dispelling the heat to folding lamellar body 2, the heat can be transmitted to first end support 4 and second end support 5 on, the end support can continue to transmit the heat to folding lamellar body 2 on, influence the radiating rate of folding lamellar body 2, consequently, set up first end support 4 and second end support 5 and heat conduction support piece 8 interval, can promote and fold lamellar body 2 radiating rate.

The last a plurality of guiding holes of seting up of tip support, utmost point ear 21 accessible guiding hole connects on busbar 1, and the guiding hole provides the direction to utmost point ear 21 for utmost point ear 21 stretches out in the guiding hole fast, thereby realizes the high-speed joint between utmost point ear 21 and the busbar 1, improves assembly efficiency.

The serial connection or parallel connection among a plurality of groups of laminated sheets 2 can be realized through the number of the bus bars 1 which are creatively arranged, and finally, the anode and the cathode led out by the battery module 100 are positioned at the same side, so that the wiring difficulty among different battery modules 100 can be reduced in the subsequent connection process of a plurality of battery modules 100, the wiring among the battery modules 100 is simpler, and the wiring occupation space is less.

Because the busbar 1 is connected to the side of the end support far away from the accommodating cavity 31, the first busbar protection shell 7a is connected to one side of the first end support 4 far away from the accommodating cavity 31, the busbar 1 arranged on the first end support 4 can be protected by the first busbar protection shell 7a, the busbar 1 is prevented from being stabbed by external sharp objects, external foreign objects are effectively prevented from falling on the busbar 1 to cause pollution, and the service life of the busbar 1 is prolonged. And two first avoidance holes 71 are arranged on the first busbar protective shell 7a, the first avoidance holes 71 leave avoidance spaces for arrangement of the electrode protective covers 6, so that the top parts of the electrodes extending out of the first busbar protective shell 7a can be located below the electrode protective covers 6, the electrode protective covers 6 are used for protecting the safety of the electrodes, the electrodes are prevented from being impacted, corroded and the like, the service life of the battery module 100 is prolonged, and the safety of the battery module 100 is improved.

The second protective bus bar 7b is connected to a side of the second end bracket 5 remote from the receiving chamber 31. The second busbar protection shell 7b can protect the busbar 1 arranged on the second end support 5, ensure that an external sharp object cannot stab the busbar 1 arranged on the second end support 5, effectively prevent external foreign objects from falling on the busbar 1 to cause pollution, and prolong the service life of the busbar 1.

It can be understood that, for prior art, the battery module 100 of this application is provided with a plurality of heat conduction support piece 8 between

electric core

2 and 3 bottoms of casing to improve the radiating rate of electric core 2, the radiating effect is good, draws forth the positive negative pole of battery module 100 to same one side at follow-up connected in-process, reduces the wiring degree of difficulty between the different battery modules 100, ensures to walk the simple and occupation space of arranging of line in the automobile body and is few, improves the space utilization in the automobile body.

Optionally, the heat conducting support member 8 may be a heat conducting pad or a heat conducting glue, so that the heat conducting support member 8 not only has certain flexibility, excellent insulation, compressibility, and natural surface viscosity, but also can fill a gap to complete heat transfer between a heating portion and a heat dissipating portion, and also has the effects of insulation, shock absorption, and the like.

Alternatively, as shown in fig. 1, both ends of the housing 3 form a first opening 311 and a second opening 312, respectively, which communicate with the accommodating chamber 31. First uncovered 311 and the uncovered 312 of second are convenient to install lamination body 2 to holding in the chamber 31, and first uncovered 311 and the uncovered 312 of second can dodge lamination body 2 outside ear of lug 21 that stretches out for in the first uncovered 311 of lug 21 accessible and the uncovered 312 of second draw forth to the guiding hole of tip support, the ear of lug 21 that draws forth from the guiding hole then is connected with busbar 1 electricity, forms the series connection between the lamination body 2 of multiunit or parallelly connected.

Optionally, the first end bracket 4 and the second end bracket 5 are detachably connected to a plurality of surfaces of the housing 3, the first end bracket 4 and the second end bracket 5 are formed as three separate structures by the detachable connection, the stack body 2 is placed in the accommodating cavity 31 and installed in place, and then the first end bracket 4 and the second end bracket 5 are connected to two sides of the accommodating cavity 31, so that the simplicity of manufacturing and the convenience of assembling the battery module 100 are greatly improved.

For convenience of description, as shown in fig. 1 and 2, a guide hole provided in the first end bracket 4 to communicate with the accommodation chamber 31 is referred to as a first guide hole 41; a guide hole provided in the second end bracket 5 to communicate with the accommodation chamber 31 is referred to as a second guide hole (not shown in the figure).

Alternatively, the first end bracket 4 and the second end bracket 5 are each partially protruded toward one side of the accommodating cavity 31 to form a plurality of spacing ribs 45 arranged in parallel, one side of each spacing rib 45 away from the accommodating cavity 11 forms an inner concave cavity 451, one guide channel 46 is formed between adjacent spacing ribs 45, one end of each guide channel 46 is communicated with the accommodating cavity 31, the other end of each guide channel 46 is connected with a guide hole, and the guide hole is arranged through the thickness direction of the end bracket.

Taking the first end bracket 4 as an example, as shown in fig. 1 and 2, a part of the structure of the first end bracket 4 protrudes toward one side of the accommodating cavity 31 to form a plurality of spaced ribs 45 arranged in parallel, a guide channel 46 is formed between adjacent spaced ribs 45, one end of each guide channel 46 is communicated with the accommodating cavity 31, the other end of each guide channel 46 is connected with the first guide hole 41, and the first guide hole 41 is arranged through the thickness direction of the first end bracket 4. Spacing rib 45 can increase the structural strength of first end support 4, when battery module 100 receives the striking, spacing rib 45 crumples the energy-absorbing and absorbs partial impact, so that the impact that is used in on folding piece body 2 reduces, and then reduce the damage of impact to folding piece body 2, the life of extension folding piece body 2, and cooperate through direction passageway 46 and first guiding hole 41, when utmost point ear 21 needs to be connected with busbar 1, utmost point ear 21 accessible direction passageway 46 stretches out first guiding hole 41 fast and is connected with busbar 1, realize the high-speed joint between utmost point ear 21 and busbar 1, improve connection efficiency.

Alternatively, as shown in fig. 2 and 5, the side of the partition rib 45 away from the accommodation chamber 11 forms an inner concave chamber 451. The formation of the inner concave cavity 451 can reduce the material consumption of the first end bracket 4 and save the production cost; in the second aspect, the weight of the first end bracket 4 can be reduced, and the battery module 100 can be reduced in weight; the concave cavity 451 in the third aspect bulges the partition rib 45 toward the side close to the accommodation cavity 31, and brings the partition rib 45 closer to the accommodation cavity 31, facilitating the partition rib 45 to guide the pole ear.

Alternatively, at least a portion of the cross-section of the spacing ribs 45 decreases toward the receiving cavity 31, and at least a portion of the cross-section of the guide channels 46 decreases toward the receiving cavity 31. Since a guide channel 46 is formed between two adjacent partition ribs 45, when the partition ribs 45 are arranged such that at least a part of the cross section thereof is gradually reduced toward the receiving chamber 31, accordingly, at least a portion of the cross-section of the guide passage 46 gradually increases toward the receiving chamber 31, when the tab 21 extends into the guide hole through the guide passage 46, the guide passage 46 with a larger cross section near the accommodating cavity 31 can ensure that the tab 21 can quickly enter the guide passage 46, and since a part of the cross-section of the guide passage 46 is gradually reduced toward a direction away from the accommodating chamber 31, to form the side surfaces of the guide passage 46 as inclined surfaces, the tab 21 is, during the movement into the guide passage 46 toward the guide hole, the side wall of the guide channel 46 can also play a role in guiding, so that the tab 21 can rapidly and accurately pass through the guide hole, and the connection efficiency of the tab 21 and the bus bar 1 is improved.

Optionally, as shown in fig. 1 and fig. 5, a plurality of first clamping ribs 47 are disposed on one side of the first end bracket 4 away from the accommodating cavity 31, the plurality of first clamping ribs 47 are enclosed around the plurality of inner concave cavities 451, the plurality of first clamping ribs 47 are enclosed to form a plurality of first clamping cavities 48, and the first clamping cavities 48 are suitable for being connected to the bus bar 1. The plurality of first clamping ribs 47 can improve the structural strength of the first end bracket 4, and can play a role in collapsing and absorbing energy when the battery module 100 is impacted; on the other hand, many first joint muscle 47 enclose to close and form a plurality of first joint chambeies 48, with busbar 1 joint in first joint intracavity 48, first joint muscle 47 has restricted busbar 1's the maximum shift position, prevents that battery module 100 from receiving when the striking busbar 1 dislocation removal and drive the utmost point ear 21 that connects on the lamination body 2 and remove, leads to utmost point ear 21 fracture damage, prolongs the life of lamination body 2 to improve the security of lamination body 2.

It should be noted that, in the present application, because the plurality of first clamping ribs 47 are enclosed around the plurality of inner concave cavities 451 and are enclosed into the first clamping cavity 48, when the bus bar 1 is connected in the first clamping cavity 48, the inner concave cavities 451 and the side wall of the bus bar 1 form a certain cavity, so that the bus bar 1 is not directly attached to the surface of the first end bracket 4, the contact area between the bus bar 1 and the first end bracket 4 is reduced, and the heat dissipation performance of the bus bar 1 is improved.

Optionally, as shown in fig. 1 and fig. 6, a plurality of second clamping ribs 53 are disposed on one side of the second end bracket 5, which is far away from the accommodating cavity 31, the plurality of second clamping ribs 53 enclose a plurality of second clamping cavities 54, and the second clamping cavities 53 are adapted to be connected to the bus bar 1. The beneficial effects of the second clamping rib 53 and the second clamping cavity 54 can refer to the beneficial effects of the first clamping rib 47 and the first clamping cavity 48, which are not described herein again.

As can be seen from fig. 5 and 6, the number of first snap-in cavities 48 on the first end support 4 to which the two electrode protection covers 6 are connected is greater than the number of second snap-in cavities 54 on the second end support 5. That is to say, the number of the busbars 1 connected to the first end bracket 4 is greater than the number of the busbars 1 connected to the second end bracket 5, and the number of the busbars 1 is creatively set to realize series connection or parallel connection between the multiple groups of lamination bodies 2, so that the positive electrode and the negative electrode led out by the battery module 100 of the present application are located on the same side, and the wiring difficulty between different battery modules 100 can be reduced in the subsequent connection process of multiple battery modules 100, and the wiring between the battery modules 100 is simpler and the wiring occupation space is less.

In a specific example, as shown in fig. 5, the number of first snap chambers 48 on the first end bracket 4 is three, and as shown in fig. 6, the number of second snap chambers 54 on the second end bracket 5 is two.

Alternatively, the first end bracket 4 and the second end bracket 5 are both made of plastic. That is, first end support 4 and second end support 5 form to the plastic support, and two plastic support covers respectively and establishes in first uncovered 311 and the uncovered 312 department of second for end support self has better chemical stability and impact resistance, and plays insulating effect, promotes the security between lamination body 2, busbar 1 and the casing 3, and is lighter because of the material of plastics, and the lightweight of battery module 100 can be realized through the end support that plastics were made.

Alternatively, the material of the housing 3 may be one of cast steel, glass fiber reinforced plastic, or aluminum alloy materials. Make casing 3 have higher intensity and rigidity, when battery module 100 takes place the striking, furthest's protection is folded piece body 2 and is not damaged, prolongs the life of folding piece body 2 and improves the security of folding piece body 2.

Advantageously, the surface of the housing 3 is subjected to corrosion protection treatment, so that the housing 3 still has a good corrosion protection effect under a long-term high-temperature condition, the service life of the housing 3 is prolonged, and the use cost of the battery module 100 is saved.

In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In some embodiments of the present invention, as shown in fig. 3, each group of stacked sheets 2 includes a plurality of pouch cells 22, each pouch cell 22 has a cell support portion 221 extending toward the bottom wall, one heat-conducting support member 8 is connected between adjacent cell support portions 221 (the specific structure of the heat-conducting support member 8 can also be seen in fig. 4), and the upper portions of the heat-conducting support members 8 respectively abut against two pouch cells 22. By arranging the battery supporting parts 221, the contact area between the soft package batteries 22 and the heat conduction supporting parts 8 can be increased, and one heat conduction supporting part 8 is arranged between the adjacent battery supporting parts 221, so that on one hand, the position stability of the two adjacent soft package batteries 22 can be ensured; on the other hand, a heat conduction support piece 8 can be simultaneously with two laminate polymer battery 22 on the heat transfer that produces at the during operation is to casing 3, for example in specific example, two heat conduction support piece 8 support three laminate polymer battery 22 respectively, have still reduced heat conduction support piece 8's use quantity when improving laminate polymer battery 22 radiating rate, practice thrift manufacturing cost and realize battery module 100's lightweight. In addition, partial laminate polymer battery 22 can support through two heat conduction support piece 8 respectively, when two heat conduction support piece 8 set up at the width direction interval of casing 3, will form certain heat dissipation space between electric core and two heat conduction support piece 8, promotes battery module 100's heat dispersion.

Alternatively, as shown in fig. 8, the heat conducting support member 8 includes a first support 81, a second support 82 and a third support 83, the first support 81 and the second support 82 are connected in a step shape, a battery support 221 is connected between the second support 82 and the first support 81, and the bottom of the first support 81 is connected to the bottom wall. The second support 82 and the first support 81 are matched to limit the position of the battery support part 221, the defined soft package battery 22 is not easy to shake, and the position of the battery support part 221 in the shell 3 is ensured to be stable, namely the position of the soft package battery 22 in the accommodating cavity 31 is stable.

Alternatively, as shown in fig. 8, a third support 83 is connected to the upper part of the second support 82, and the third support 83 is supported between the two sets of the sides of the pouch cells 22. The contact area between the heat conduction support member 8 and the pouch battery 22 is increased through the third support body 83, the position of the pouch battery 22 is further limited, and the position stability of the battery support part 221 in the housing 3 is ensured.

In the description of the invention, features defined as "first", "second" and "third" may explicitly or implicitly include one or more of the features for distinguishing between the described features, whether they are sequential or not.

Optionally, heat conduction support member 8 extends along the length direction of casing 3, so that heat conduction support member 8 can provide support for the structure of the whole length direction of electric core, and heat dissipation performance of the whole electric core is improved while stable support of electric core by heat conduction support member 8 is ensured.

Optionally, as shown in fig. 7, the battery module 100 further includes a plurality of buffer foam 9, and the plurality of buffer foam 9 are respectively disposed between the lamination bodies 2 and the housing 3, and between the two sets of lamination bodies 2. The cotton 9 of buffering bubble mainly plays the effect that the buffering was inhaled and is inhaled at the in-process that battery module 100 initial stage equipment and battery module 100 rocked, that is to say for multiunit lamination body 2 provides certain shock attenuation effect, effectively prevents jolting of battery module 100 vehicle-mounted in-process, prevents to take place the dislocation between the lamination body 2 of multiunit and causes the fish tail, and the cotton 9 of buffering bubble still can use the bulging force of later stage to the lamination body 2 production to absorb at battery module 100.

Optionally, when the buffering foam 9 is disposed between the two laminated bodies 2, a matching groove (not shown in the figure) is opened at the top of the heat-conducting support member 8, and the buffering foam 9 is embedded into the matching groove. The cooperation groove can play the cotton 9 effect of fixed buffering bubble, will cushion during the cotton 9 embedding cooperation grooves of bubble, and the cotton 9 of in-process buffering bubble of 100 transportation or rocking of battery module can not produce and rock.

In some embodiments of the present invention, as shown in fig. 9, a plurality of first clipping holes 72 are formed on the first busbar protective casing 7a around the first avoidance hole 71, a plurality of clips 61 are formed on the electrode protective covers 6, and the clips 61 are clipped and matched with the first clipping holes 72. By arranging the buckle 61 and the first clamping hole 72, on the first hand, the buckle 61 and the first clamping hole 72 can realize quick positioning in the process of connecting the electrode protection cover 6 and the first busbar protection shell 7a, so that the assembly convenience of the electrode protection cover 6 and the first busbar protection shell 7a is improved; in the second aspect, after the electrode protection cover 6 and the first bus protection shell 7a are assembled, the buckle 61 and the first buckle hole 72 form an abutting fit, so that the connection quality is improved, and the battery module 100 is not easy to loosen in the moving process; in a third aspect, the first busbar protection shell 7a and the electrode protection shell 6 are detachably connected through the buckles 61 and the first clamping holes 72, and when other components connected between the electrode protection shell 6 and the first busbar protection shell 7a need to be maintained or replaced, the battery module 100 is convenient to assemble and disassemble, so that the maintenance of the battery module 100 is more convenient and faster.

Alternatively, the electrode protection cover 6 and the first end support 4 are manufactured in an integral injection molding process. On one hand, the electrode protection cover 6 and the first end bracket 4 do not need to be subjected to machining such as welding, polishing and grinding in the early stage in the assembly process of the battery module 100, so that the assembly process is effectively simplified, and the production efficiency of the battery module 100 is improved; on the other hand, the electrode protection cover 6 is arranged on the first end support 4, and after the electrode protection cover 6 is connected with the first busbar protection shell 7a, the first end support 4 can be connected with the first busbar protection shell 7a, so that the assembly efficiency is improved.

Optionally, the battery module 100 further includes an FPC board 10 (the specific structure of the FPC board 10 can be seen in fig. 9), the FPC board 10 is connected to one side of the first end bracket 4 away from the accommodating cavity 31, a second avoiding hole (not shown in the figure) is formed in the first bus bar protecting shell 7a, the second avoiding hole is located between the two first avoiding holes 71, part of the structure of the FPC board 10 extends into the second avoiding hole, and the FPC board 10 is respectively connected to the bus bars 1 on the first end bracket 4. The second dodges the hole and leaves the space of dodging for laying of FPC board 10, conveniently lays FPC board 10 and guarantees that FPC board 10 accessible second dodges the hole and is connected with external component, in the detection circuitry who connects on FPC board 10 with busbar 1, winding displacement etc. for detect the output voltage and the electric current of each busbar 1, be convenient for monitor whole battery module 100's operating condition.

In some embodiments of the present invention, the first avoiding hole 71 is disposed at an upper portion of the first end bracket 4, as shown in fig. 9, a positioning insertion plate 42 is formed by extending a lower portion of the first end bracket 4 toward the first bus bar protection casing 7a, a plurality of first locking legs 74 are disposed at a bottom portion of the first bus bar protection casing 7a, a positioning insertion slot 75 is defined between the plurality of first locking legs 74, and when the positioning insertion plate 42 is inserted into the positioning insertion slot 75, the first locking legs 74 abut against the positioning insertion plate 42. In the process that first end support 4 and first bank of protection shell 7a are connected, first card foot 74 and location picture peg 42 can play direction and location effect, the assembly convenience of first end support 4 and first bank of protection shell 7a has been promoted, and after first end support 4 and first bank of protection shell 7a assembly were accomplished, location picture peg 42 inserted location slot 75 and the first card foot 74 of butt, make first card foot 74 and location picture peg 42 form the butt cooperation, improve connection quality, ensure that battery module 100 is difficult for taking off at the removal in-process, improve battery module 100's structural stability.

Optionally, as shown in fig. 9, a plurality of second locking pins 43 are disposed on a side surface of the first end bracket 4 facing the first busbar protective housing 7a, a plurality of second locking holes 76 are disposed on the first busbar protective housing 7a, and the second locking pins 43 are locked in the second locking holes 76. The cooperation of second card foot 43 and second card hole 76 makes first end support 4 and first bank protective housing 7a form and can dismantle the connection, further promotes the assembly convenience of first end support 4 and first bank protective housing 7a, and forms the butt cooperation with second card foot 43 joint in second card hole 76, improves connection quality.

Alternatively, the plurality of second locking legs 43 have different locking directions. In some specific examples, the upper portion of the first end bracket 4 protrudes toward the first busbar protection casing 7a to form a plurality of second locking feet 43, and the top of the first busbar protection casing 7a is provided with a plurality of second locking holes 76 matched with the second locking feet 43; the lower part of the first end support 4 also extends towards the first busbar protective shell 7a to form a plurality of second clamping feet 43, the bottom of the first busbar protective shell 7a is provided with a plurality of second clamping holes 76 matched with the second clamping feet 43, and the second clamping feet 43 and the second clamping holes 76 at different positions are matched, so that the connecting force of the busbar protective shell 7 and the end support 4 in different directions is effectively improved, and the connecting quality of the first end support 4 and the first busbar protective shell 7a is improved.

According to the structure, the first end support 4 and the first busbar protective shell 7a are connected in a matched mode through the buckle 61 and the first clamping hole 72, the second clamping pin 43 and the second clamping hole 76, and the first clamping pin 74 and the positioning insertion plate 42 respectively, so that the first end support 4 and the first busbar protective shell 7a can be detachably connected, and the connection strength is improved while the assembly efficiency is improved.

Correspondingly, the second end support 5 and the second busbar protective shell 7b are connected in a matched manner through the second clamping pin 43 and the second clamping hole 76 and the first clamping pin 74 and the positioning insertion plate 42 respectively, so that the second end support 5 and the second busbar protective shell 7b can be detachably connected, and the assembling efficiency and the connection strength between the second end support 5 and the second busbar protective shell 7b are improved.

In some embodiments of the present invention, as shown in fig. 10, the housing 3 includes a top shell 33, a bottom shell 34, two side shells 35 and two end shells 36, one end of each of the two side shells 35 is connected to the bottom shell 34, the other end of each of the two side shells 35 is connected to the top shell 33, two ends of the top shell 33 are respectively abutted to the first end bracket 4 and the second end bracket 5, one end shell 36 is connected to a side of the first bank protection shell 7a away from the first end bracket 4, and the other end shell 36 is connected to a side of the second bank protection shell 7b (see fig. 1 for a specific structure of the second bank protection shell 7 b) away from the second end bracket 5. The accommodating cavity 31 with two open ends is formed inside the housing 3 by matching the two side shells 35, the bottom shell 34 and the top shell 33, during the assembly process of the battery module 100, the multiple groups of laminated bodies 2 can be firstly placed in the accommodating cavity 31 formed by enclosing the two side shells 35, the bottom shell 34 and the top shell 33, then the first end bracket 4 and the second end bracket 5 are respectively connected with two ends of the top shell 33, after the two end shells 36 are connected in place, the two end shells 36 are respectively connected with the first end bracket 4 and the second end bracket 5, the production and manufacture simplicity and the assembly convenience of the housing 3 are greatly improved, and as one end shell 36 is connected with one side of the first busbar protective shell 7a, the other end shell 36 is connected with one side of the second busbar protective shell 7b, the two end shells 36 can play a role in protecting the busbar protective shell and the end bracket, the service lives of the busbar protective shell and the end bracket are prolonged, the use cost of the battery module 100 is reduced, and when the battery module 100 is impacted, the two end shells 36 can also reduce the damage of the impact force to the multiple groups of laminated stacks 2 by using the strength of the two end shells.

Optionally, a removable connection is formed between two side shells 35, bottom shell 34, and top shell 33. The detachable connection may improve the ease of manufacturing and assembly of the housing 3. The detachable connection can be a bolt and a nut, can also be riveted, can also be in clamping fit with a clamping groove through a buckle, and can be selected according to actual requirements.

Alternatively, as shown in fig. 11, a first socket 351 is provided on the side shell 35, a second socket 361 is provided on the end shell 36, and a buckle is provided on the side of the end bracket, and the buckle is in insertion fit with the first socket 351 and the second socket 361 in sequence. That is to say, the lateral parts of the first end bracket 4 and the second end bracket 5 are provided with the buckles, and the buckles, the first insertion holes 351 and the second insertion holes 361 enable the end brackets, the side casing 35 and the end casing 36 to be in clamping fit, so that the assembly convenience and the connection quality of the battery module 100 are improved, and the battery module 100 is stable in structure.

For convenience of description, the insert buckle provided on the first end bracket 4 is referred to as a first insert buckle 44 (the specific structure of the first insert buckle 44 can be seen in fig. 11); the insert buckle provided on the second end bracket 5 is referred to as a second insert buckle 52 (the specific structure of the second insert buckle 52 can be seen in fig. 10). The first inserting buckle 44 is sequentially in inserting fit with the first inserting hole 351 and the second inserting hole 361 to form detachable connection among the first end support 4, the side shell 35 and the end shell 36, and the second inserting buckle 52 is sequentially in inserting fit with the first inserting hole 351 and the second inserting hole 361 to form detachable connection among the second end support 5, the side shell 35 and the end shell 36, so that the connection strength and the connection efficiency among the components in the battery module 100 are improved.

Optionally, as shown in fig. 11, a plurality of first heat dissipation holes 77 are formed in the first busbar protective casing 7a, and the sum of the flow areas of the plurality of first heat dissipation holes 77 gradually decreases from the middle to both sides. By arranging the first heat dissipation holes 77 on the first bus bar protection shell 7a, the first heat dissipation holes 77 can timely dissipate heat generated by the multiple sets of lamination bodies 2, the bus bar 1 and the FPC board 10 in the working process, so that thermal runaway of the soft package battery 22 caused by heat accumulation is avoided, and the safety performance of the battery module 100 is improved; the weight of first protective housing 7a is arranged still to a plurality of first louvres 77 second aspect, realize the lightweight of first protective housing 7a that arranges, and then realize battery module 100's lightweight, and a plurality of first louvres 77 reduce gradually to the area sum of overflowing of both sides from the centre, the quantity of laying of the first louvre 77 of both sides has still been reduced when guaranteeing that the heat at battery module 100 middle part can distribute away fast, guarantee first protective housing 7 a's intensity of arranging, it can play the guard action to laminate polymer battery 22 to ensure that first protective housing 7a connects on the both sides of first end support 4, effectively prolong laminate polymer battery 22's life, guarantee battery module 100's safety in utilization.

In some specific examples, as shown in fig. 11, five rows of first heat dissipation holes 77 are provided on the first busbar protective casing 7 a. Wherein, the middle region of the first heat dissipation hole 7a is provided with two rows of first heat dissipation holes 77, the upper region of the first heat dissipation hole 7a is provided with two rows of first heat dissipation holes 77, and the lower region of the first heat dissipation hole 7a is provided with one row of first heat dissipation holes 77. The distance between two adjacent first louvers 77 of the middle region is less than the distance between the middle first louver 77 and the nearest upper first louver 77, and the distance between two adjacent first louvers 77 of the middle region is less than the distance between the middle first louver 77 and the nearest lower first louver 77. The structural strength of the first bus protection case 7a can be increased while ensuring effective dissipation of heat in the middle of the battery module 100, so that the first bus protection case 7a can effectively protect the laminated body 2.

Optionally, as shown in fig. 11, a plurality of second heat dissipating holes 362 are formed on the end casing 36, and an area of the second heat dissipating holes 362 is larger than an area of the first heat dissipating holes 77. Make the heat that a plurality of first louvres 77 were derived can in time follow second louvre 362 and emit, avoid the heat accumulation to lead to laminate polymer battery 22 to take place the thermal runaway, improve battery module 100's security performance, and the area of overflowing of second louvre 362 is greater than the area of overflowing of first louvre 77, guarantee that a second louvre 362 can distribute away the heat that a plurality of first louvres 77 were derived simultaneously, still can reduce the quantity of laying of second louvre 362 when improving second louvre 362 radiating rate, increase the structural strength of end shell 36.

It should be noted that, the second busbar protective housing 7b is further provided with a plurality of third heat dissipation holes (not shown in the figure), the function of the plurality of third heat dissipation holes is the same as that of the first heat dissipation hole 77, heat generated in the working process of the plurality of sets of lamination bodies 2, the busbar 1 and the FPC board 10 is diffused in time, the structure of the plurality of third heat dissipation holes is also the same as that of the first heat dissipation hole 77, and the sum of the flow areas from the middle to the two sides is gradually reduced, which is not described herein again.

In a specific example, as shown in fig. 11, the cross-sectional shape of the first heat dissipation hole 77 is a square, and the square here is a rectangle; the cross-sectional shape of the second louvers 362 is circular, and the aperture size of the second louvers 362 is not smaller than the length size of the first louvers 77. Make the area of overflowing of second louvre 362 be greater than the area of overflowing of first louvre 77, ensure that the heat that first louvre 77 derives can in time follow second louvre 362 effluvium, avoid the heat to accumulate and lead to laminate polymer battery 22 to take place the thermal runaway, and the cross sectional shape is interval between two adjacent first louvres 77 of increase that the first louvre 77 of quad slit can maximize, under the prerequisite of guaranteeing first protective housing 7a structural strength that converges, make the heat that laminate body 2 produced distribute away in time, ensure that the heat can not gather in the inside of battery module 100. Correspondingly, the cross-sectional shape of the third heat dissipation hole is also a square hole, and the beneficial effect produced by the third heat dissipation hole in the square hole can refer to the beneficial effect produced by the first heat dissipation hole 77 in the square hole, which is not described herein again.

In other examples, the cross-sectional shapes of the first louver 77 and the third louver may also be formed in an elliptical shape; the cross-sectional shape of the second louvers 362 is circular, and the aperture size of the second louvers 362 is not smaller than the major diameter size of the first louvers 77. The advantageous effect of the second louvers 362 is the same as the advantageous effect of the first louvers 77 and the third louvers, which are formed in a square shape and a circular shape, and thus the description thereof is omitted.

Alternatively, as shown in fig. 11, a plurality of claws 73 are symmetrically arranged on the first busbar protective casing 7a toward the end casing 36, and the claws 73 can be engaged with the second heat dissipation holes 362. Can connect end shell 36 on first protective housing 7a that arranges through jack catch 73 and the cooperation of second louvre 362, make first protective housing 7a that arranges and end shell 36 formation can dismantle the connection, promote the assembly convenience of first protective housing 7a that arranges and end shell 36, and form the butt cooperation with jack catch 73 joint in second louvre 362, improve the connection quality, guarantee that the relative position relation of first protective housing 7a that arranges in casing 3 is stable, the in-process that the vehicle was gone or is rocked, first protective housing 7a that arranges can not rock for casing 3, just that is soft-package battery 22 can not rock for casing 3, and then improve the stability of soft-package battery 22 in holding chamber 31.

Alternatively, as shown in fig. 11, the claws 73 include two, and the two claws 73 are arranged axisymmetrically at the center line of the first bank protection case 7 a. The first bus bar protective case 7a is stably coupled in the case 3 by the two jaws 73, further increasing the structural stability of the battery module 100.

The specific structure of the battery module 100 according to the exemplary embodiment of the present invention will be described with reference to the accompanying drawings. The embodiments of the present invention may be all embodiments obtained by combining the foregoing technical solutions, and are not limited to the following specific embodiments, which fall within the scope of the present invention.

Example 1

A battery module 100, as shown in fig. 1, includes: busbar 1, lamination stack 2, housing 3, first end support 4, second end support 5, two electrode protection covers 6, first busbar protective housing 7a and second busbar protective housing 7 b.

As shown in fig. 1, a containing cavity 31 for containing a plurality of sets of laminated sheets 2 is provided in the housing 3, as shown in fig. 3 and 4, a plurality of heat conducting supporting members 8 are provided at the bottom of the housing 3 toward the laminated sheets 2, the bottom wall of the housing 3 is connected to the bottom of the heat conducting supporting members 8, the top of the heat conducting supporting members 8 abuts against the laminated sheets 2, and the heat conducting supporting members 8 extend along the length direction of the housing 3.

As shown in fig. 1, the first end bracket 4 and the second end bracket 5 are respectively located at two sides of the accommodating cavity 31, and the first end bracket 4 and the second end bracket 5 are respectively arranged at an interval with the heat conducting support member 8, a plurality of guide holes communicated with the accommodating cavity 31 are respectively formed in the first end bracket 4 and the second end bracket 5, the bus bars 1 are connected to one side of the end bracket far away from the accommodating cavity 31, as shown in fig. 5, the number of the bus bars 1 arranged at the first end bracket 4 is more than that of the bus bars 1 arranged at the second end bracket 5.

The tab 21 protrudes from the guide hole and is connected to the bus bar 1.

As shown in fig. 1, two electrode protection covers 6 are each connected to a side of the first end carrier 4 remote from the receiving space 31.

Example 2

On the basis of embodiment 1, as shown in fig. 3 and 4, each stack body 2 includes a plurality of pouch cells 22, each pouch cell 22 has a cell support portion 221 extending toward the bottom wall in a bent manner, a heat-conducting support member 8 is connected between adjacent cell support portions 221, and the upper portion of each heat-conducting support member 8 abuts against two pouch cells 22.

As shown in fig. 8, the heat conducting supporting member 8 includes a first supporting body 81, a second supporting body 82 and a third supporting body 83, the first supporting body 81 and the second supporting body 82 are connected in a step shape, a battery supporting part 221 is connected between the second supporting body 82 and the first supporting body 81, and the bottom of the first supporting body 81 is connected with the bottom wall; the third support body 83 is connected to the upper part of the second support body 82, and the third support body 83 is supported between the two groups of the side faces of the soft package battery 22.

Example 3

Based on embodiment 1, as shown in fig. 9, a first busbar protective shell 7a is provided with two first clamping holes 72 around a first avoidance hole 71, each electrode protective cover 6 is provided with two buckles 61, and the buckles 61 are in clamping fit with the first clamping holes 72.

The first avoiding hole 71 is disposed at the upper portion of the first end bracket 4, as shown in fig. 9, the lower portion of the first end bracket 4 extends toward the first busbar protective shell 7a to form a positioning insertion plate 42, two first locking legs 74 are disposed at the bottom of the first busbar protective shell 7a, a positioning insertion slot 75 is enclosed between the two first locking legs 74, and when the positioning insertion plate 42 is inserted into the positioning insertion slot 75, the first locking legs 74 abut against the positioning insertion plate 42.

As shown in fig. 9, four second locking pins 43 are arranged on one side surface of the first end bracket 4 facing the first busbar protective shell 7a, four second locking holes 76 are arranged on the first busbar protective shell 7a, and the second locking pins 43 are locked in the second locking holes 76; the four second clamping legs 43 have different clamping directions.

Example 4

A battery module 100, based on embodiment 3, as shown in fig. 1 and 10, a housing 3 includes a top casing 33, a bottom casing 34, two side casings 35 and two end casings 36, one end of each of the two side casings 35 is connected to the bottom casing 34, the other end of each of the two side casings 35 is connected to the top casing 33, two ends of the top casing 33 are respectively abutted to a first end bracket 4 and a second end bracket 5, one of the end casings 36 is connected to a side of a first bus protection casing 7a away from the first end bracket 4, and the other end casing 36 is connected to a side of a second bus protection casing 7b away from the second end bracket 5.

As shown in fig. 11, a first receptacle 351 is disposed on the side shell 35, a second receptacle 361 is disposed on the end shell 36, and a plug-in buckle is disposed on a side portion of the end bracket, and the plug-in buckle is sequentially plugged into and matched with the first receptacle 351 and the second receptacle 361.

Example 5

In embodiment 4, as shown in fig. 11, a first busbar protective housing 7a is provided with a plurality of first heat dissipation holes 77, and the sum of the flow areas of the plurality of first heat dissipation holes 77 gradually decreases from the middle to both sides.

As shown in fig. 11, the end housing 36 is provided with a plurality of second heat dissipating holes 362, and the flow area of the second heat dissipating holes 362 is larger than that of the first heat dissipating holes 77.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Other configurations of the battery module 100 according to the embodiment of the present invention, such as how the plurality of stacked plates 2 are connected in series or in parallel via the bus bars 1, are known to those skilled in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "embodiment," "example," etc., 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 invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the 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 module, comprising:

a plurality of busbars;

the laminated sheet bodies are arranged in a plurality of groups, and each group of laminated sheet bodies is provided with tabs extending towards two ends;

the laminated body comprises a shell, wherein a containing cavity for containing a plurality of groups of laminated bodies is formed in the shell, a plurality of heat conduction supporting pieces are arranged at the bottom of the shell towards the laminated bodies, the bottom of each heat conduction supporting piece is connected with the bottom wall of the shell, the top of each heat conduction supporting piece is abutted against the laminated body, and the heat conduction supporting pieces extend along the length direction of the shell;

the first end support and the second end support are respectively positioned at two sides of the accommodating cavity, the first end support and the second end support are respectively arranged at intervals with the heat-conducting supporting piece, a plurality of guide holes communicated with the accommodating cavity are formed in the first end support and the second end support, the bus bars are connected to one side of the end supports, which is far away from the accommodating cavity, and the number of the bus bars arranged on the first end support is more than that of the bus bars arranged on the second end support; the lug extends out of the guide hole and is connected with the bus bar;

the two electrode protection covers are connected to one side face, far away from the accommodating cavity, of the first end support;

the first busbar protective shell is connected to one side face, away from the accommodating cavity, of the first end support, two first avoidance holes are formed in the first busbar protective shell, and the two electrode protective covers extend out of the two first avoidance holes respectively;

and the second busbar protective shell is connected to one side surface, far away from the accommodating cavity, of the second end support.

2. The battery module according to claim 1, wherein each group of the laminated body comprises a plurality of laminate batteries, each laminate battery has a battery supporting portion extending toward the bottom wall in a bending manner, one heat-conducting supporting member is connected between the adjacent battery supporting portions, and the upper portions of the heat-conducting supporting members are respectively abutted against two laminate batteries.

3. The battery module according to claim 2, wherein the heat-conducting supporting member comprises a first supporting body, a second supporting body and a third supporting body, the first supporting body and the second supporting body are connected in a step shape, the battery supporting part is connected between the second supporting body and the first supporting body, and the bottom of the first supporting body is connected with the bottom wall; the third support body is connected on the upper portion of the second support body, and the third support body is supported between two sets of laminate polymer battery side.

4. The battery module according to claim 1, further comprising a plurality of cushion foam, the plurality of cushion foam being respectively disposed between the lamination body and the case and between the two sets of lamination bodies;

when two be equipped with the buffering bubble cotton between the lamination body, the cooperation groove has been seted up at heat conduction support piece's top, the cotton embedding of buffering bubble in the cooperation groove.

5. The battery module according to claim 1, wherein the first busbar protective casing is provided with a plurality of first clamping holes around the first avoidance hole, the electrode protective cover is provided with a plurality of buckles, and the buckles are in clamping fit with the first clamping holes.

6. The battery module according to claim 5, further comprising an FPC board, wherein the FPC board is connected to a side of the first end support far away from the accommodating cavity, a second avoiding hole is formed in the first busbar protection shell, the second avoiding hole is located between the two first avoiding holes, a partial structure of the FPC board extends into the second avoiding hole, and the FPC board is respectively connected with the busbars on the first end support.

7. The battery module according to claim 1, wherein the first avoidance hole is formed in the upper portion of the first end support, the lower portion of the first end support extends out towards the first busbar protective shell to form a positioning insertion plate, a plurality of first clamping pins are arranged at the bottom of the first busbar protective shell, a plurality of positioning insertion grooves are formed between the first clamping pins in an enclosing mode, and when the positioning insertion plate is inserted into the positioning insertion grooves, the first clamping pins are abutted to the positioning insertion plate.

8. The battery module according to claim 7, wherein a plurality of second clamping pins are arranged on one side surface of the first end support facing the first busbar protective shell, a plurality of second clamping holes are formed in the first busbar protective shell, and the second clamping pins are clamped in the second clamping holes; and the clamping directions of the second clamping pins are different.

9. The battery module of any of claims 1-8, wherein the housing comprises a top housing, a bottom housing, two side housings, and two end housings, wherein one end of each of the two side housings is connected to the bottom housing, the other end of each of the two side housings is connected to the top housing, the two ends of the top housing are respectively abutted by the first end bracket and the second end bracket, wherein one of the end housings is connected to a side of the first busbar protective housing away from the first end bracket, and wherein the other end housing is connected to a side of the second busbar protective housing away from the second end bracket;

the side shell is provided with a first socket, the end shell is provided with a second socket, the side part of the end part support is provided with a plug-in buckle, and the plug-in buckle is sequentially matched with the first socket and the second socket in a plug-in mode.

10. The battery module as recited in claim 9, wherein the first bus bar protection housing is provided with a plurality of first heat dissipation holes, and the sum of the flow areas of the first heat dissipation holes gradually decreases from the middle to the two sides;

the end shell is provided with a plurality of second radiating holes, and the flow area of the second radiating holes is larger than that of the first radiating holes.