Lithium ion battery module and battery pack with same

Abstract

The utility model relates to the field of lithium ion batteries, and discloses a lithium ion battery module and a battery pack with the same. The module comprises an assembling support, the assembling support comprises a vertical frame of an integrated structure, and the vertical frame comprises a bottom frame, a top frame and two vertical side frames connected between the two tail ends of the bottom frame and the top frame, one of the two single batteries is located in the front frame, the other of the two single batteries is located in the rear frame, the bottoms of the two single batteries are located on the storage table respectively, the two sides of the two single batteries are limited to the inner side faces of the two frames respectively, the interval face is arranged between the two single batteries in an interval mode, and tabs of the two single batteries extend out of the top frame respectively. Two rows of tabs opposite to each other are formed, the two tabs in the same row are electrically connected to the top surface of the top frame, and the two battery monomers are connected in series or in parallel; the heat-conducting sheet metal part comprises a middle area and two bent edges which are connected to the two sides of the middle area and are perpendicular to the middle area, the middle area covers the outer side face, opposite to the spacing face, of any battery monomer, and the two bent edges cling to and cover the outer side faces of the two frames of the assembling support.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of battery pack especially relates to a lithium ion battery module and battery pack with module. BACKGROUND

[0002] With the more and more widely used battery, especially the application of lithium ion battery, the equipment using lithium ion battery is also more and more, and the use environment is also more and more complex. SUMMARY

[0003] One of the purposes of the utility model embodiment is to provide a lithium ion battery module and battery pack with module, and the application of the scheme is favorable for improving the temperature balance of lithium ion battery.

[0004] The utility model embodiment provides a lithium ion battery module, including,

[0005] The assembly support includes a vertical frame of integrated structure, the vertical frame includes opposite bottom frame, top frame and two vertical side frames connected between the two ends of the bottom frame and the top frame, the space surface in the vertical plane between the bottom frame, the top frame and the two side frames, the top surface of the bottom frame is horizontal and the object table, the object table and the opposite inner side surface of the two side frames form the object frame, the space surface is spaced to the front frame located in the front of the space surface and the rear frame located in the back,

[0006] Two battery monomers, one of which is located in the front frame, and the other is located in the rear frame, the bottom of the two battery monomers is located on the object table respectively, and the two sides are limited to the inner side surface of the two side frames, and the space surface is spaced between the two battery monomers,

[0007] The tab of the two battery monomers is respectively stretched out from the top frame, forming two rows of front and back opposite tabs, the two tabs in the same column are electrically connected to the top surface of the top frame, and the two battery monomers are connected in series or parallel;

[0008] The heat conduction sheet metal part includes a middle region and two bending edges connected to the middle region and perpendicular to the middle region,

[0009] The middle region covers the outer side surface of any battery monomer opposite to the space surface, and the two bending edges are tightly covered on the outer side surface of the two side frames of the assembly support.

[0010] Optionally, the tab is respectively bent on the top surface of the top frame, and two bus bars made of conductive material are locked on the top surface of each column of tabs, the two bus bars have an insulating distance therebetween, and each column of tabs is tightly attached between the top surface of the top frame and the bottom surface of each bus bar.

[0011] Optionally, two bus bars made of conductive material are locked on the top surface of the top frame, and the two bus bars have an insulating spacing therebetween, and the two rows of tabs are respectively welded to the top surface of the two bus bars.

[0012] Optionally, a limiting groove extending in the front-rear direction is further arranged on the top surface of the top frame, and is located between the two bus bars, and a lateral opening is respectively formed on two groove edges of the limiting groove,

[0013] A temperature and voltage acquisition module is arranged in the limiting groove, the temperature and voltage acquisition module is internally provided with a circuit and a temperature sensor electrically connected to the circuit, and two extending portions extending outward are arranged on two edges of the temperature and voltage acquisition module, the extending portions extend out of the lateral openings and are electrically connected to the bus bars to acquire the voltage of each bus bar.

[0014] Optionally, a front-rear penetrating through hole is respectively arranged at four top corners of the vertical frame, and the two battery monomers are located in the space between the four through holes.

[0015] Optionally, a plurality of vertical studs are further arranged on the top surface of the top frame, and an insulating protective cover plate is fixed on the top of the stud.

[0016] Optionally, a plurality of front-rear penetrating holes are respectively arranged on the top frame and / or the bottom frame.

[0017] Optionally, the spacing surface is in the shape of a cross and is integrally connected with the bottom frame, the top frame and the two side frames.

[0018] Optionally, the width of the top frame is narrower than the width of the placement table and is narrower than the width of each side frame, and the electrodes of each battery monomer extend from two edges of the top frame.

[0019] Optionally, a protruding positioning column and a recessed positioning hole are respectively arranged on the front-rear opposite end surfaces of the bottom frame, any positioning column has a positioning hole opposite thereto, and any positioning hole has a positioning column opposite thereto.

[0020] Optionally, a buckle portion is respectively arranged on the outer side surface of the two side frames.

[0021] In a second aspect, the utility model embodiment provides a lithium ion battery pack comprising a plurality of any of the lithium ion battery modules.

[0022] From the above, the battery assembly support of the embodiment has compact structure, the battery monomer is mounted on both sides of the isolation surface of the support, the series and parallel connection between the tab of two battery monomers can be realized on the top frame, a battery module is obtained, the bottom frame of the upright frame is used as the bottom support of the battery module, the battery module has compact structure and is convenient to install, and the production efficiency of the battery pack is improved.

[0023] In addition, the heat balance of the lithium ion battery module can be improved by using the technical scheme of the embodiment. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which are included to provide a further understanding of the present application and constitute a part of this application, illustrate embodiments of the present application and do not limit the present application in any way.

[0025] Figure 1 are respectively the perspective structural schematic diagrams of the battery assembly support provided by the embodiment of the present application;

[0026] Figure 2 is the side structural schematic diagram of the battery assembly support provided by the embodiment of the present application;

[0027] Figure 3 are the front and rear end surface structural schematic diagrams of the battery assembly support provided by the embodiment of the present application;

[0028] Figure 4 , 5 are the top view and bottom view structural schematic diagrams of the battery assembly support provided by the embodiment of the present application;

[0029] Figure 6 is the exploded structural schematic diagram of the battery module provided by the embodiment of the present application;

[0030] Figure 7 , 8 are respectively the perspective structural schematic diagrams of the battery module provided by the embodiment of the present application;

[0031] Figure 9 is the exploded structural schematic diagram of the lithium ion battery pack provided by the second embodiment;

[0032] Figures 10-15 are respectively the assembly structural schematic diagrams of the lithium ion battery pack provided by the second embodiment.

[0033] 11: bottom frame; 12: top frame; 13: side frame; 14: object table; 15: busbar fixing part;

[0034] 16: spacing surface; 17: through hole; 18: hole part; 19: stud; 22: limiting groove;

[0035] 61: positioning column; 62: positioning hole; 63: first buckle part;

[0036] 21: Busbar; 23: Through slot; 24: Temperature and voltage acquisition module; 25: Pin header interface;

[0037] 31: Battery cell; 32: Electrode;

[0038] 41: Screw; 42: Protective cover plate; 43: End plate; 44: Lifting hole; 45: Insulating buffer sheet;

[0039] 46: Insulating spacer block; 51: Insulating protective sleeve;

[0040] 7: Heat-conducting sheet metal part; 71: Bending edge; 72: Middle area; 73: Second snap-fit ​​part;

[0041] 81: Electrically controlled temperature regulating plate; 82: Temperature conducting plate; 83: Heat insulation plate. Detailed Implementation

[0042] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The illustrative embodiments and descriptions of the present invention are used to explain the present invention, but are not intended to limit the present invention. Example

[0043] See Figures 1-8 Show.

[0044] This embodiment provides a battery mounting bracket suitable for lithium-ion battery packs and a battery module composed of the mounting bracket.

[0045] The main body of the mounting bracket is an upright frame made of a one-piece molded insulating material, such as, but not limited to, a rigid plastic part made of one-piece injection molding. A spacer surface 16 in a vertical plane is provided at the center of the upright frame. For ease of description, the side with the front of the spacer surface 16 is referred to as the front, and the side with the back of the spacer surface 16 is referred to as the rear.

[0046] The upright frame includes a bottom frame 11 and a top frame 12 that are opposite each other, and two upright side frames 13 located between the bottom frame 11 and the top frame 12. The two side frames 13 are opposite each other from left to right. The top of the two side frames 13 is connected to the left and right ends of the top frame 12, and the bottom of the two side frames 13 is connected to the left and right ends of the bottom frame 11, forming a frame.

[0047] A horizontal shelf 14 is provided at the top of the bottom frame 11. The left and right ends of the shelf 14 are connected to the lower ends of the two side frames 13 of the upright frame to form a shelf frame. The inner sides of the two upright frames are the upright side frames of the shelf frame. The partition surface 16 divides the shelf frame into a front frame located on the front of the partition surface 16 and a back frame located on the back of the partition surface 16.

[0048] When assembling the battery, a battery cell 31 (or cell) is placed on the table 14 of the front frame, and another battery cell 31 is placed on the table 14 of the rear frame. The left and right sides of the two battery cells 31 are respectively limited to the inner sides of the left and right side frames 13, and the spacing surface 16 is spaced between the two battery cells 31.

[0049] As an example of the present embodiment, preferably, the width of the front and rear direction of the top frame 12 is narrower than the width of the table 14, and is narrower than the width of the two side frames 13. The top frame 12 and the spacing surface 16 are located in the middle of the width of the table 14 and each side frame 13, and the electrodes of the two battery cells 31 located on both sides of the spacing surface 16 respectively extend from both sides of the top frame 12.

[0050] The top surface of the top frame 12 is also provided with a busbar fixing part 15. In the present embodiment, the positive and negative electrode lugs 32 of the battery cell 21 are shown as extending from the top end together. Two busbar fixing parts 15 are provided on the top surface of the top frame 12, and the two busbars 21 have a certain spacing therebetween. The electrode lugs 32 of the two battery cells 21 respectively extend from both sides of the top frame 12, are bent on the top frame 12 to connect the electrode lugs 32 of the two battery cells 31, and then the two busbars 21 are respectively fixed on the top frame 12, so that the connected electrode lugs 32 are tightly pressed under the busbars 21, realizing the connection between the two battery cells 31, and obtaining a battery module. The two battery cells 31 can be connected in parallel or in series. As can be seen from the above, compared with the prior art technical solution of welding the electrode lugs 32 of the battery cell 31 on the top surface of the busbar 21, the present solution can use screws to lock the busbar 21 on the top frame 12 and tightly press on the electrode lugs 32 to realize the fixation and electrical connection between the electrode lugs 32, which is more convenient to operate, does not need to use welding equipment, has lower preparation cost, and when the battery is disassembled and the battery cell 31 is replaced, the connection between the busbar 21 and the electrode lugs 32 can be removed by unscrewing the screw, which is flexible and convenient.

[0051] As can be seen from the above, the battery assembly support structure of the present embodiment is compact, the battery cells 31 are respectively mounted on both sides of the spacer surface of the support, the series and parallel connection between the electrode lugs 32 of the two battery cells 31 can be made on the top frame 12, a battery module is obtained, and the bottom frame 11 of the upright frame is used as the bottom support of the battery module. The battery module structure is compact and convenient to install, which is beneficial to improve the production efficiency of the battery.

[0052] As an example of the present embodiment, a front and rear through hole 17 is provided at each of the four top corners of the upright frame of the present embodiment, and each through hole 17 is located outside the storage frame, i.e. the storage frame is located in the space between each through hole 17, and the position of the screw rod 41 is higher than the plane where the busbar 21 is located.

[0053] In the assembling of the battery pack, the plurality of battery modules can be stacked in front of and behind each other, the electrodes of the top frame 12 of each battery module are electrically connected according to the series and parallel connection relationship of each battery module of the battery pack, the four threaded rods 41 are respectively penetrated through the penetration holes 17 at the four vertices of each battery module, and the threaded rods 41 are locked to tightly attach each battery module. A plurality of battery modules form a larger battery pack. In actual application, the number of battery modules can be increased or decreased according to application needs. In the adjustment, assembling and disassembling of the battery pack, the user only needs to adjust the threaded rods 41 at the top corners, and the shell does not need to be replaced. The present scheme is beneficial to reduce the production materials of the battery pack and reduce the production cost.

[0054] As an illustration of the present embodiment, a plurality of front-to-back through holes 18 are hollowed out in the top frame 12 of the assembly support as weight reduction holes to reduce the weight of the battery module. These holes 18 are uniformly distributed on the top frame 12.

[0055] Similarly, a plurality of front-to-back through holes 18 are hollowed out in the bottom frame 11 as weight reduction holes, and the placement table 14 is located on the top surface of the bottom frame 11.

[0056] As an illustration of the present embodiment, the spacing surface 16 in the shape of a "cross" can be used, but is not limited to. The spacing surface 16 is integrally connected with the left and right side frames 13, the bottom frame 11 and the top frame 12 in the shape of a "cross" with the front-to-back through hollow parts near the inner sides of the four top corners in the central upright frame. This structure is beneficial to save material cost, reduce the weight of the battery pack, and improve the heat dissipation effect of the two battery monomers 31 on both sides of the spacing surface 16.

[0057] As an illustration of the present embodiment, the top surface of the top frame 12 is a flat surface. For example, the positive and negative electrodes of the battery monomer 31 extend from the top. In application, the busbar 21 made of conductive material can be fixed above the top frame 12 on each limiting platform. The tab 32 extending from the two sides of the top frame 12 of each battery monomer 31 is bent on the top surface of the busbar 21 and welded on the busbar 21. The series or parallel connection between each battery monomer 31 is realized through the busbar 21, which is convenient for the assembling of the battery pack.

[0058] As an illustration of the present embodiment, a plurality of threaded rods 19 are arranged on the top surface of the top frame 12 of the upright frame, the top surfaces of the threaded rods 19 are flush, and the openings of the threaded holes of the threaded rods 19 are upward. In the assembling of the battery pack, an insulating protective cover plate 42 is installed on the top surface of the threaded rods 19, and the electrode connecting components such as the busbar 21 are covered below the protective cover plate 42 to prevent dust and moisture.

[0059] Although it is illustrated that the positive and negative tabs 32 of each battery cell 31 extend from the top end of the battery, and two bus bars 21 are arranged on the top frame 12 of the assembly bracket, the present embodiment is not limited thereto. For example, one of the positive and negative tabs 32 of the battery cell 31 extends from the top of the battery, and the other extends from the bottom of the battery. In this case, the bus bars 21 can be arranged on the top surface of the top frame 12 and the bottom surface of the bottom frame 11, respectively, to connect the tabs 32 between the two battery cells 31, thereby achieving series and parallel connection between the battery cells 31.

[0060] In addition, as an illustration of the present embodiment, a front-rear direction extending limiting groove 22 is further arranged in the middle of the top frame 12, and the limiting groove 22 is spaced between the two bus bars 21. In this way, the temperature and voltage acquisition module 24 can be laid in the limiting groove 22. The temperature and voltage acquisition module 24 is provided with an extending portion which is in close contact with each bus bar 21, such as but not limited to being locked together with the bus bar 21 through the bus bar fixing portion 15, to detect the temperature of the battery module in real time and ensure the safety of charging and discharging.

[0061] As an illustration of the present embodiment, the lithium ion battery module further comprises a heat conduction sheet metal part 7. The heat conduction sheet metal part 7 comprises two opposite bent edges 71 and an intermediate region 72 between the two bent edges 71 and perpendicular to the two bent edges 71. During assembly, the intermediate region 72 between the two bent edges 71 covers the outward lateral surface of any battery cell facing away from the spacing surface 16. The width of the intermediate region 72 is slightly wider than the width of the lateral surface of the battery cell and slightly wider than the width between the two side frames 13 of the assembly bracket. The two bent edges 71 on both sides of the intermediate region 72 cover the outer lateral surface of the two side frames 13 of the assembly bracket. The present embodiment can improve the thermal uniformity of the lithium ion battery module. The heat conduction sheet metal part 7 can be but not limited to an aluminum sheet bent into shape.

[0062] As an illustration of the present embodiment, the battery cell and the heat conduction sheet metal part 7 can be but not limited to be connected by pasting, such as but not limited to being pasted by double-sided tape.

[0063] In addition, a first clamping portion 63 can be further arranged on the outer lateral surface of the two side frames 13 of the assembly bracket, and a second clamping portion 73 which can match each first clamping portion 63 can be arranged on the two bent edges 71 of the heat conduction sheet metal part 7. During assembly, each second clamping portion 73 of the two bent edges 71 of the heat conduction sheet metal part 7 is matched and clamped with each first clamping portion 63 on the two side frames 13, and the heat conduction sheet metal part 7 is fixed on the assembly bracket, so that the assembly bracket serves as the gravity bearing part of the heat conduction sheet metal part 7. This scheme is conducive to further improving the structural stability of the battery module and improving the assembly efficiency. Embodiment

[0064] Referring to Figures 9-15 As shown in the embodiment, the lithium ion battery pack is composed of at least two lithium ion battery modules shown in the embodiment.

[0065] Referring to the drawings, the battery modules are sequentially arranged in a column to form a battery pack body, the electrodes between any two adjacent battery modules are located in the same column and extend from the top.

[0066] In the battery pack body, any two adjacent battery modules are arranged such that the heat conduction sheet metal member 7 covering the outer side surface of the battery module is in face-to-face contact with the exposed outer side surface of the battery module of the other battery module, one surface of any heat conduction sheet metal member 7 in the arranged battery pack body is in contact with the battery module of the battery module, and the other surface is in contact with the battery module of the opposite battery module. The heat conduction sheet metal members 7 outside the frame 13 of each battery module are sequentially arranged on the two side surfaces of the battery pack body. The through holes 17 at the four top corners of the vertical frame of each battery module are sequentially and oppositely arranged, i.e., the through holes 17 are respectively arranged on four parallel straight lines, and the four threaded rods 41 are respectively inserted through the through holes 17 at the four top corners. The four threaded rods 41 connect the battery modules together, and the two ends of each threaded rod 41 are locked to sequentially arrange the vertical frames of the lithium ion battery modules together. The battery modules 31 are encapsulated in the front frame and the rear frame of the vertical frame and locked in the space between the four threaded rods 41 to obtain a fixed battery pack body. The tabs 32 of the battery modules 31 extend from the top frame 12 of the vertical frame to the top of the battery pack body, and the tabs 32 extending from the top are connected in series or in parallel or in a combination of series and parallel to obtain the battery pack body. The battery pack body provides power to the outside with the total positive and negative electrodes.

[0067] As can be seen from the above, the battery pack of the embodiment is connected together by the threaded rods 41, and the battery pack is flexible and convenient to assemble. The application is beneficial to improve the assembly efficiency and reduce the production cost.

[0068] When any battery module 31 or battery module is damaged, the user can loosen the locked threaded rods 41, and the faulty battery module 31 or battery module can be removed for replacement or removal. When the battery pack is reassembled, the four threaded rods 41 are reinserted and the threaded rods 41 are locked. It can be seen that the battery pack of the embodiment has various application scenarios and is convenient to maintain.

[0069] As an example of the embodiment, a plurality of bus bars 21 made of conductive material with good conductivity are provided, such as copper bus bars 21.

[0070] As an embodiment of the present application, the electrodes of adjacent battery cells 31 are bent and tightly attached to the flat top surface of the top frame 12, the bus bars 21 are covered on the top surface of the tabs that need to be electrically connected to the same electrical node, and the bus bars 21 are locked on the top frames 12, so that the tabs 32 that need to be electrically connected are tightly pressed on the bottom surface of the same bus bar 21, tightly attached between the top frame 12 and the bus bar 21, and electrically connected together through the bus bar 21.

[0071] As another preferred embodiment of the present application, a square through slot 23 that can be passed through by each tab 32 can be provided on each bus bar 21, and the tabs 32 that need to be electrically connected to the same bus bar 21 extend from the through slot 23 on the bus bar 21, the bus bar 21 is locked on the top surface of the top frame 12, and then each tab 32 is bent and tightly attached to the top surface of the bus bar 21 on which it is located and laser welded to the top surface of the bus bar 21. With this scheme, the connection between each tab 32 and the bus plate is more stable. Moreover, the tabs are located on the top surface of the bus plate, and the series or parallel electrical connection relationship between each battery cell 31 is more obviously visible.

[0072] As an embodiment of the present application, bus bars 21 of multiple sizes can be designed according to the series or parallel relationship in the current batch of battery pack bodies, the number of battery modules contained, and the convenience of assembly. Two rows of bus bars 21 are formed on the top surface of the battery pack body, each row has multiple bus bars 21, and each bus bar 21 corresponds to multiple tabs 32 of battery cells 31.

[0073] As an embodiment of the present application, a limiting slot 22 is provided on the top of each upright frame, which can be but not limited to being composed of limiting flaps that are located on both sides of the limiting slot 22 and protrude above the top surface of the top frame 12. When the front and rear doors of each battery module are arranged opposite to each other, the limiting slots 22 on the top surface of each battery module are in front and back communication, and each bus bar 21 is located on both sides of the communicating limiting slots 22. A strip-shaped temperature and voltage acquisition module 24 is provided on the top surface of the battery pack body and laid in the limiting slots 22 that are directly opposite to the slot. The temperature and voltage acquisition module 24 is provided with a circuit and a temperature sensor electrically connected to the circuit, and a plurality of extending parts extending to both sides are also provided on both sides of the strip-shaped temperature and voltage acquisition module 24 in the length direction. Each extending part extends from both sides and is locked and electrically connected to the top surface of each bus bar 21 to acquire the voltage of the electrical connection of each locked bus bar. The strip-shaped temperature and voltage acquisition module 24 detects the temperature of the predetermined detection position on the top surface of the battery pack body and acquires the voltage of the predetermined electrical node, and transmits each temperature detection value and voltage acquisition value to the charging and discharging control circuit to protect the safety of the battery pack. Moreover, the temperature detection data and voltage acquisition data can also be output to the user to enable the user to grasp the state of the battery pack in real time and discover abnormalities in time to ensure the safety of the battery pack.

[0074] As an embodiment of the present application, the temperature and voltage acquisition module 24 can be made of a flexible circuit board. The temperature and voltage acquisition module 24 can be connected to the temperature probe and the voltage acquisition module through the pin seat interface 25 at one end of the temperature and voltage acquisition module 24.

[0075] As an embodiment of the present application, at least two threaded studs 19 are arranged on the top surface of each top frame 12. The threaded studs 19 have threaded holes with openings facing upwards. After the threaded rods 41 are locked, the electrical connection between the tabs 32 of the battery monomers 31 and the fixing of the temperature and voltage acquisition module 24 are completed, a protective cover plate 42 is arranged on the top of the battery pack body. The bottom surface of the protective cover plate 42 is supported on the top of each threaded stud 19. The protective cover plate 42 is locked. The bus bars 21, the temperature and voltage acquisition module 24 and other electrical connection components are completely covered below the protective cover plate 42. There is a predetermined gap between the protective cover plate 42 and the electrical connection components below. The design of the protective cover plate 42 is beneficial to improve the moisture-proof and dust-proof effect of the battery pack.

[0076] As an embodiment of the present application, the battery pack further comprises two end plates 43. The end plates 43 have through holes 17 opposite to the through holes 17 at the four corners of each upright frame. During assembly, the flat surface of the two end plates 43 is attached to the end surface of the battery module at the two end sides of the battery pack body. The two ends of the four threaded rods 41 respectively pass through the through holes 17 at the four corners of the two end plates 43. The end nuts are screwed on the outer end surface of the two end plates 43 to lock the battery modules between the two end plates 43. The battery monomers 31 are encapsulated in the upright frames of the battery modules. As an embodiment of the present application, the outer end surface of the two end plates 43 respectively has a battery pack hoisting part. For example, a metal plate can be used as the end plate 43. An insulating layer is sprayed on the surface of the metal plate. In addition, at least one horizontally bent metal part is formed on the outer end surface of the end plate 43. The hoisting hole 44 is arranged on the metal part. The technical solution of the present application is beneficial to improve the structural fastening of the battery pack body. The external mounting structure of the end plate 43 hoisting is beneficial to improve the anti-shock performance of the battery pack during use.

[0077] As an embodiment of the present application, a soft insulating buffer piece 45 can be further arranged between the inner end surface of the two end plates 43 and the outer end surface of the battery modules at the two ends to further improve the anti-shock performance of the battery pack.

[0078] As an embodiment of the present application, a plurality of insulating spacer blocks 46 are fixed on the top surface of the battery pack body. The insulating spacer blocks 46 are higher than the top surface of each bus bar 21. Each insulating spacer block 46 is arranged between two adjacent bus bars 21 with different electrode polarities to insulate and separate.

[0079] As an example of the present embodiment, the total positive electrode and the total negative electrode of the battery pack body can be extended out of the two end plates 43 of the battery pack body and located outside the protective cover plate 42 to facilitate connection during application. In addition, an insulating protective sleeve 51 is sleeved on the total positive electrode and the total negative electrode to improve moisture resistance and dust resistance.

[0080] As an example of the present embodiment, the upright frame of each battery module is provided with a protruding positioning column 61 and a recessed (or through) positioning hole 62 on the two opposite front and rear end surfaces of the bottom frame 11. The back surface of any positioning column 61 has a positioning hole 62 opposite to it, and the back surface of any positioning hole 62 has a positioning column 61 opposite to it, forming a one-to-one and opposite relationship. When assembling the battery pack body of the present embodiment, the bottom frames 11 of any two adjacent battery modules are in face-to-face contact, and the positioning columns 61 on the two opposite bottom frames 11 are limited in the positioning holes 62 of the opposite bottom frames 11, thereby limiting the connection between the two opposite bottom frames 11 to avoid displacement, further facilitating positioning and assembly, improving assembly efficiency, and improving the structural stability of the assembled battery pack.

[0081] As an example of the present embodiment, two electrically controlled temperature regulating pieces 81 can be further arranged on the two sides of the battery pack body covered with the heat-conducting sheet metal parts 7, and each electrically controlled temperature regulating piece 81 is fully attached to the outside of the heat-conducting sheet metal part 7 on the side. The two electrically controlled temperature regulating pieces 81 are connected in series and electrically connected with the control module (not shown in the figure) of the battery pack. The control module controls the operation of the two electrically controlled temperature regulating pieces 81 in real time according to the temperature data transmitted by the temperature and voltage acquisition module 24.

[0082] For example, when the temperature and voltage acquisition module 24 detects that the current temperature is lower than the set lower limit of the temperature, the control module controls the electrical connection between the battery pack body and the electrically controlled temperature regulating piece 81 to drive the electrically controlled temperature regulating piece 81 to generate heat, and the heat is transmitted to each battery monomer through each heat-conducting sheet metal part 7 to heat each battery monomer. When the temperature and voltage acquisition module 24 detects that the current temperature is higher than the set upper limit of the temperature, the control module controls the electrical connection between the battery pack body and the electrically controlled temperature regulating piece 81 to drive the electrically controlled temperature regulating piece 81 to cool, and the heat of each battery monomer is transmitted to the electrically controlled temperature regulating piece 81 through each heat-conducting sheet metal part 7 to cool each battery monomer. As can be seen from the above, the present embodiment can adjust the temperature of each battery monomer in each battery module to ensure the working temperature of the battery pack.

[0083] As an illustration of this embodiment, a flexible and efficient heat-conducting sheet 82 can be further installed between the heat-conducting sheet 7 and the electronically controlled temperature regulating sheet 81 on the outside of the battery pack body, further improving the thermal conductivity between the two electronically controlled temperature regulating sheets 81 and each heat-conducting sheet 7, thereby improving the heat conduction capability between the electronically controlled temperature regulating sheet 81 and each battery cell, and improving the temperature regulation efficiency.

[0084] Furthermore, two heat insulation sheets 83 can be further provided on the outside of the two electrically controlled temperature regulating sheets 81. Each heat insulation sheet 83 covers the outer surface of each electrically controlled temperature regulating sheet 81, which on the one hand prevents heat loss, and on the other hand protects the electrically controlled temperature regulating sheet 81.

[0085] The specific assembly process is as follows:

[0086] 1. Battery module assembly, see Figures 6-8 As shown, after assembling two battery cells 31 onto an assembly bracket, a heat-conducting sheet metal part 7 is further installed to obtain a battery module. Multiple battery modules are obtained in this way.

[0087] 2. See Figure 10 As shown, according to the requirements of series and parallel connection, a predetermined number of battery modules are arranged face to face in a row, and the positioning holes 62 and positioning posts 61 on the bottom frame 11 of each module are fixed together for limiting.

[0088] 3. See Figure 11 As shown, end plates 43 (and insulating buffer sheets 45) are fixed at the front and rear ends of the arrayed battery modules, respectively. Screws 41 pass through the end plates 43 and the arrayed battery modules, and screws 41 are locked at the outer end faces of the two end plates 43.

[0089] 4. See Figure 12 As shown, insulating spacers 46 are installed between adjacent electrical nodes with different electrodes at the top of the battery pack.

[0090] 5. See Figure 13 As shown, a busbar 21 is installed on the top of the battery pack, and each tab 32 is electrically connected to the busbar 21. A temperature and voltage acquisition module 24 is also installed.

[0091] 6. See Figure 14 As shown, install the electrode protective sleeve and the protective cover plate 42.

[0092] 7. See also Figure 15 As shown, a temperature-conducting plate 82, an electronically controlled temperature regulating plate 81, and a heat-insulating plate 83 are installed.

[0093] The above-described embodiments do not constitute a limitation on the protection scope of the technical solutions. Any modification, equivalent replacement and improvement made within the spirit and principle of the above-described embodiments should be included in the protection scope of the technical solutions.

Claims

1. A lithium-ion battery module, characterized in that, include, The mounting bracket includes an integrated upright frame, which includes a bottom frame, a top frame, and two upright side frames connected between the two ends of the bottom frame and the top frame. A vertical plane is formed between the bottom frame, the top frame, and the two side frames. A horizontal shelf is formed on the top surface of the bottom frame. The shelf and the opposing inner surfaces of the two side frames form a storage frame. The partition plane divides the storage frame into a front frame located on the front side of the partition plane and a rear frame located on the back side. Two battery cells, one located within the front frame and the other within the rear frame, are positioned with their bottoms resting on the shelf and their sides confined to the inner sides of the two frame members. A spacer is positioned between the two battery cells. Each of the two battery cells has a tab extending from the top frame to form two rows of tabs facing each other. The two tabs in the same row are electrically connected to the top surface of the top frame. The two battery cells are connected in series or in parallel. A heat-conducting sheet metal part, including a central region and two bent edges connected to the two sides of the central region and perpendicular to the central region. The intermediate region covers the outer side of any of the battery cells opposite to the spacer surface, and the two bent edges are closely attached to and cover the outer sides of the two frames of the mounting bracket.

2. The lithium-ion battery module according to claim 1, characterized in that, Each of the aforementioned tabs is bent on the top surface of the top frame. Two busbars made of conductive material are also locked on the top surface of each row of tabs. There is an insulating gap between the two busbars. Each row of tabs is in close contact with the top surface of the top frame and the bottom surface of each busbar.

3. The lithium-ion battery module according to claim 1, characterized in that, Two busbars made of conductive material are also locked on the top surface of the top frame, with an insulating gap between the two busbars, and the two rows of electrodes are respectively welded to the top surface of the two busbars.

4. The lithium-ion battery module according to claim 2 or 3, characterized in that, The top surface of the top frame is also provided with a limiting groove extending in the front-to-back direction, located between the two busbars, and lateral openings are respectively opened on the two sides of the limiting groove. A temperature and voltage acquisition module is provided in the limiting groove. The temperature and voltage acquisition module is equipped with a circuit and a temperature sensor electrically connected to the circuit. The temperature and voltage acquisition module has outwardly extending protrusions on both sides. The protrusions extend out from the lateral opening and are electrically connected to the busbars to acquire the voltage of each busbar.

5. The lithium-ion battery module according to claim 1, characterized in that, The upright frame has through holes at the four corners, and the two battery cells are located in the space between the four through holes.

6. The lithium-ion battery module according to claim 1, characterized in that, The top surface of the top frame is also provided with a plurality of upright studs, and an insulating protective cover plate is fixed on the top of the studs.

7. The lithium-ion battery module according to claim 1, characterized in that, The top frame and / or bottom frame are provided with a plurality of through holes.

8. The lithium-ion battery module according to claim 1, characterized in that, The spacer surface is cross-shaped and is integrated with the bottom frame, top frame, and two side frames.

9. The lithium-ion battery module according to claim 1, characterized in that, The width of the top frame is narrower than the width of the shelf and narrower than the width of each of the side frames, and the electrodes of each battery cell extend from both sides of the top frame.

10. The lithium-ion battery module according to claim 1, characterized in that, The bottom frame has protruding positioning posts and recessed positioning holes on its front and back opposite ends. Each positioning post has a positioning hole opposite to it, and each positioning hole has a positioning post opposite to it.

11. The lithium-ion battery module according to claim 1, characterized in that, Each of the two frame sides is provided with a buckle.

12. A lithium-ion battery pack, characterized in that, The lithium-ion battery module includes any one of claims 1 to 11.

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