Battery module

Abstract

The invention discloses a battery module. The battery module comprises a battery cell assembly, an end plate, a hoisting piece and a fixing belt, wherein the end plates are arranged at the two ends of the battery cell assembly in the length direction, and hoisting parts are arranged on the top surfaces of the end plates; the hoisting piece is detachably mounted at the hoisting part; and the fixing band is sleeved on the peripheries of the two end plates and the battery core assembly so as to fix the battery core assembly between the two end plates. The problem that the space utilization rate in a battery pack box is low due to the fact that hoisting pieces occupy the space at the two ends of the module when the battery module is put into the box in the prior art can be solved.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery module. Background Art

[0002] Nowadays, the application fields of energy storage equipment are becoming more and more extensive. Energy storage equipment generally uses battery packs as energy components, and battery modules are the core components of battery packs. As the battery capacity continues to increase, battery packs need to put as many battery modules as possible in a limited space. This will compress the distance between battery modules and the distance between battery modules and the inner wall of the battery box, which is not conducive to manual handling into the box.

[0003] The existing battery modules are installed at both ends of the module by lifting parts to place the battery modules into the box, which occupies the space at both ends of the module, resulting in a certain gap between the battery modules and the inability to narrow the spacing between the battery modules, reducing the space utilization in the battery pack box and ultimately reducing the battery pack capacity. Summary of the invention

[0004] The main purpose of the present application is to provide a battery module to solve the problem in the prior art that when the battery module is put into a box, the lifting parts occupy the space at both ends of the module, resulting in low space utilization in the battery pack box.

[0005] According to one aspect of the present application, a battery module is provided, comprising:

[0006] Battery cell components;

[0007] End plates, the end plates are arranged at both ends of the battery core assembly in the length direction, and the top surface of the end plates is provided with a hoisting portion;

[0008] A hanging piece, the hanging piece is detachably mounted on the hanging part;

[0009] A fixing belt is sleeved on the two end plates and the outer periphery of the battery core assembly to fix the battery core assembly between the two end plates.

[0010] Furthermore, one of the hanging portion and the hanging piece is provided with a threaded hole, and the other of the two is provided with a threaded column matched with the threaded hole.

[0011] Furthermore, the hoisting part includes one or more parts. When the hoisting part includes multiple parts, the multiple hoisting parts are arranged on the top surface of the end plate at intervals along the width direction of the battery module.

[0012] Furthermore, the end plate includes a first surface and a second surface opposite to the first surface, the first surface is in contact with the battery cell assembly, and the second surface is provided with a limiting portion, the limiting portion includes two limiting ribs, the two limiting ribs are spaced apart along the height direction of the battery module to form a limiting space between the two limiting ribs, and the fixing belt is arranged in the limiting space.

[0013] Furthermore, the second surface is provided with an insertion slot, the battery module includes a supporting portion, and the supporting portion is detachably arranged in the insertion slot to at least limit and fix the fixing belt.

[0014] Furthermore, the battery module comprises:

[0015] An insulating plate, the insulating plate cover is arranged on the top of the battery core assembly;

[0016] A protection circuit board, the protection circuit board is arranged on the insulating board, the protection circuit board comprises a signal acquisition component and a circuit board body, and the signal acquisition component and the circuit board body are electrically connected;

[0017] A signal connector is disposed on the top surface of one of the two end plates, and the signal connector is electrically connected to the signal collection component through the circuit board body.

[0018] Furthermore, a drainage groove is provided on the top surface of the end plate, and the drainage groove has a first drainage end close to the battery cell assembly and a second drainage end away from the battery cell assembly. Along the direction from the first drainage end to the second drainage end, the drainage groove is inclined toward the bottom surface of the battery module.

[0019] Furthermore, the battery module includes a conductive connecting piece, which is arranged on the insulating plate and connected between the battery cell assembly and the protection circuit board, and the conductive connecting piece has a conductive portion for being clamped by a conductive clip to charge the battery cell.

[0020] Furthermore, an insertion opening is provided on the conductive connecting sheet, and the conductive portion is formed in a region of the conductive connecting sheet between the insertion opening and an outer edge of the conductive connecting sheet.

[0021] Furthermore, a recessed portion is provided on a side of the insulating plate facing away from the battery core, the conductive connecting sheet is provided in the recessed portion, and an extended portion for preventing the conductive clip from clamping the conductive portion is provided near an outer edge of the conductive portion.

[0022] Furthermore, a pressure relief portion is provided on the battery core assembly, and a relief hole corresponding to the pressure relief portion is provided on the protection circuit board;

[0023] The battery module comprises a battery cover plate, the battery cover plate is covered on the protection circuit board, the battery cover plate is provided with an exhaust portion, and the exhaust portion is provided corresponding to the pressure relief portion;

[0024] Wherein, when the battery cell assembly is in a thermal runaway state, the electrolyte of the battery cell assembly is released from the pressure relief portion and sprayed toward the exhaust portion, so that the exhaust portion is forced to be opened.

[0025] Furthermore, the exhaust portion includes a valve body, a first connecting rib and a valve sheet. The valve body is installed on the battery cover, and the valve body is provided with a mounting opening that passes through the battery cover in the thickness direction. The valve sheet covers the mounting opening, and the first connecting rib is connected between the valve sheet and the valve body.

[0026] Furthermore, the battery module comprises:

[0027] A protection circuit board, wherein the protection circuit board cover is arranged on the top of the battery core assembly, and output poles are arranged at both ends of the length direction of the protection circuit board;

[0028] Electrode protection seats, the electrode protection seats are respectively arranged on the top surfaces of the two end plates, and the electrode protection seats are provided with wiring parts;

[0029] An electrode protection cover, wherein the electrode protection cover is arranged on the electrode protection seat and is enclosed with the electrode protection seat to form an assembly space, the wiring portion is located in the assembly space, and openings are arranged on at least two different side walls of the electrode protection cover, at least one of the two openings is used for the output pole to penetrate into the assembly space to be connected with the wiring portion, and the other of the two openings is used for the conductive connector to penetrate into the assembly space to be connected with the output pole.

[0030] Further, the opening includes a first opening and a second opening, the first opening is used for the output electrode to penetrate into the assembly space, the second opening is used for the conductive connector to penetrate into the assembly space, and the electrode protection cover includes a main body and a surrounding plate connected to the main body;

[0031] Wherein, the first opening is arranged on a side of the enclosure away from the main body, and the second opening is arranged on two opposite side walls of the enclosure; or,

[0032] The first opening is arranged on a side of the enclosure away from the main body, and the second opening is arranged on the main body.

[0033] Furthermore, the outer surface of the electrode protection seat is provided with a first guide portion and a second guide portion, the first guide portion extends along the height direction of the battery module, and the second guide portion extends along the length direction of the battery module and intersects the first guide portion perpendicularly;

[0034] The electrode protection cover includes a first electrode protection cover and a second electrode protection cover. The first electrode protection cover is covered on the electrode protection seat through the first guide portion, and the second electrode protection cover is covered on the electrode protection seat through the second guide portion.

[0035] Furthermore, one of the electrode protection seat and the electrode protection cover is provided with a buckle which is inclined along the height direction of the battery module, and the other of the two is provided with a slot which is adapted to the buckle.

[0036] In the present application, the end plate is used in conjunction with the fixing belt. When the battery module is actually processed, the end plates can be provided at both ends of the length direction of the battery core assembly, and then the fixing belt is set on the two end plates and the periphery of the battery core assembly to fix the battery core assembly. When the battery module needs to be moved into the battery pack box, it is only necessary to install the lifting member at the lifting part, and then use the connecting member such as a rope to connect the lifting member to the lifting member, and the battery module can be moved into the box. In this process, since the battery pack needs to put more battery modules in a limited space as much as possible to increase the battery pack capacity, it is necessary to make the gap between the battery modules in the box smaller. To this end, the present application is provided with a lifting part on the top surface of the end plate. By connecting the lifting member to the lifting part, the battery module can be moved in the height direction of the battery module. When each battery module is loaded into the box one by one, the lifting member will not occupy the space on both sides of the battery module, which is conducive to reducing the gap between the battery modules, thereby reducing the volume of the battery pack, effectively improving the space utilization rate in the battery pack box, and finally increasing the battery pack capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0038] Figure 1 A schematic diagram of the structure of a battery module disclosed in an embodiment of the present application;

[0039] Figure 2 An exploded view of a battery module disclosed in an embodiment of the present application;

[0040] Figure 3 This is a schematic diagram of the structure of the end plate disclosed in the embodiment of the present application;

[0041] Figure 4The attached embodiment disclosed in this application Figure 3 A magnified image of area A;

[0042] Figure 5 It is a schematic structural diagram of an end plate with a supporting portion disclosed in an embodiment of the present application;

[0043] Figure 6 It is a structural schematic diagram of the hanging component disclosed in the embodiment of the present application;

[0044] Figure 7 This is a schematic diagram of the structure of the first electrode protection cover and the electrode protection seat when they are assembled according to the embodiment of the present application;

[0045] Figure 8 It is a structural schematic diagram of the second electrode protection cover and the electrode protection seat when they are assembled according to the embodiment of the present application;

[0046] Fig. 9 This is a schematic diagram of the structure of the electrode protection seat disclosed in the embodiment of the present application;

[0047] Fig.10 The attached embodiment disclosed in this application Fig. 9 Enlarged view of area B;

[0048] Fig.11 A schematic diagram of the structure of the first electrode protection cover disclosed in an embodiment of the present application;

[0049] Fig.12 A schematic diagram of the structure of the second electrode protection cover disclosed in an embodiment of the present application;

[0050] Fig.13 It is a schematic structural diagram of a second electrode protection cover with a blocking portion disclosed in an embodiment of the present application;

[0051] Fig.14 A schematic diagram of the structure of the protection circuit board and the insulation board disclosed in the embodiment of the present application;

[0052] Fig.15 The attached embodiment disclosed in this application Fig.14 Enlarged view of the middle C area;

[0053] Fig.16 A top view of the protection circuit board and the insulation board disclosed in the embodiment of the present application;

[0054] Fig.17 This is a schematic diagram of the structure of the insulation board disclosed in the embodiment of the present application;

[0055] Fig.18 This is a schematic diagram of the structure of the battery cover disclosed in the embodiment of the present application;

[0056] Fig.19 The attached embodiment disclosed in this application Fig.18 Magnified view of area D in the middle.

[0057] The above drawings include the following reference numerals:

[0058] 10. Battery cell assembly; 11. Battery cell; 12. Pressure relief unit;

[0059] 20, end plate; 201, first surface; 202, second surface; 21, lifting part; 211, threaded hole; 22, limiting part; 221, limiting rib; 222, limiting space; 23, plug-in slot; 24, supporting part; 25, drainage slot; 2501, first drainage end; 2502, second drainage end; 26, lifting part; 261, threaded column; 27, electrode protection seat; 271, wiring part; 272, first guide part; 2721, first plug-in end; 273, second guide part ; 2731, second plug-in end; 274, buckle; 275, main body section; 276, connecting section; 2761, connecting buckle; 2762, guiding inclined surface; 28, electrode protection cover; 2801, assembly space; 281, main body; 282, enclosure; 283, first electrode protection cover; 2831, first guide matching portion; 284, second electrode protection cover; 2841, second guide matching portion; 285, slot; 29, opening; 291, first opening; 292, second opening;

[0060] 30. Fixing belt; 40. Insulating plate; 41. Recessed portion; 42. Extended portion; 50. Protective circuit board; 51. Signal acquisition component; 52. Circuit board body; 53. Avoidance hole; 54. Output pole; 55. Conductive connecting piece; 551. Conductive portion; 552. Insertion port; 60. Signal connector; 70. Battery cover; 71. Exhaust portion; 72. Valve body; 73. First connecting rib; 74. Valve sheet; 75. Gap; 80. Conductive component; 90. Retaining portion; 91. Plate body; 92. Second connecting rib. DETAILED DESCRIPTION

[0061] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0062] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0063] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the present application. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0064] As mentioned in the background technology, the existing battery module is installed at both ends of the module by a hanging piece to put the battery module into the box. This will occupy the space at both ends of the module, resulting in a certain gap between the battery modules and the battery modules cannot be narrowed, thereby reducing the space utilization rate in the battery pack box, and ultimately resulting in a reduction in the battery pack capacity. To this end, the inventor of the present application has designed a new type of battery module, which can solve the problem in the prior art that the hanging piece occupies the space at both ends of the module when the battery module is put into the box, resulting in low space utilization rate in the battery pack box. The battery module of the present application will be described in detail in conjunction with the accompanying drawings.

[0065] It should be noted that the “length direction of the battery module” in this application is the length direction of the battery module. Figure 1 The direction indicated by the letter X in the figure is the width direction of the battery module. Figure 1 The direction indicated by the letter Y in the figure is the height direction of the battery module. Figure 1 The direction indicated by the letter Z.

[0066] See also Figure 1 to Figure 2 As shown, according to an embodiment of the present application, a battery module is provided, which includes a battery cell assembly 10, an end plate 20, a hanging member 26 and a fixing belt 30.

[0067] Among them, the end plates 20 are arranged at both ends of the length direction of the battery cell assembly 10, and a lifting portion 21 is provided on the top surface of the end plate 20; the lifting part 26 is detachably installed at the lifting portion 21; the fixing belt 30 is sleeved on the two end plates 20 and the outer periphery of the battery cell assembly 10 to fix the battery cell assembly 10 between the two end plates 20.

[0068] In this embodiment, the end plate 20 is used in conjunction with the fixing belt 30. When the battery module is actually processed, the end plates 20 can be provided at both ends of the length direction of the battery cell assembly 10, and then the fixing belt 30 is sleeved on the two end plates 20 and the periphery of the battery cell assembly 10 to fix the battery cell assembly 10. When the battery module needs to be moved into the battery pack box, it is only necessary to install the hoisting member 26 at the hoisting part 21, and then use a rope or other connecting member to connect the hoisting member 26 to move the battery module into the box. In this process, since the battery pack needs to put as many battery modules as possible in a limited space to increase the battery pack capacity, the gap 75 between the battery modules in the box needs to be smaller. To this end, the present embodiment is provided with a lifting portion 21 on the top surface of the end plate 20. By connecting the lifting part 26 to the lifting part 21, the battery module can be moved in the height direction of the battery module. When each battery module is loaded into the box one by one, the lifting part 26 will not occupy the space on both sides of the battery module, which is beneficial to narrowing the gap 75 between the battery modules, thereby reducing the volume of the battery pack, effectively improving the space utilization in the battery pack box, and ultimately increasing the battery pack capacity.

[0069] Specifically, see Figure 1 As shown, the battery cell assembly 10 in this embodiment includes at least one battery cell 11. When the battery cell 11 includes multiple batteries, the multiple battery cells 11 are arranged in sequence along the length direction of the battery module.

[0070] Further, see Figures 5 and 6 As shown, one of the hanging part 21 and the hanging member 26 in this embodiment is provided with a threaded hole 211, and the other is provided with a threaded column 261 adapted to the threaded hole 211. That is, when the hanging part 21 is provided with a threaded hole 211, the hanging member 26 is provided with a threaded column 261; when the hanging part 21 is provided with a threaded column 261, the hanging member 26 is provided with a threaded hole 211. Figure 3 And attached Figure 6 2 shows the situation where the hanging part 21 is provided with a threaded hole 211 and the hanging member 26 is provided with a threaded column 261 .

[0071] Specifically, when the battery module needs to be moved into the battery pack box, the connection between the hanging member 26 and the hanging part 21 can be achieved by simply connecting the threaded column 261 with the threaded hole 211, which effectively improves the reliability of the connection between the hanging member 26 and the hanging part 21 and prevents the battery module from falling and being damaged during the movement. At the same time, the arrangement of the threaded column 261 and the threaded hole 211 in this embodiment facilitates the installation and removal of the hanging member 26, has a simple structure, and is easy and quick to operate.

[0072] Further, see Figure 3 as well as Figure 5As shown, the hoisting part 21 in this embodiment includes one or more. When the hoisting part 21 includes multiple parts, the multiple hoisting parts 21 are arranged at intervals on the top surface of the end plate 20 along the width direction of the battery module. Specifically, the multiple hoisting parts 21 arranged at intervals can more evenly bear the load when the battery module is hoisted, reduce the problem of excessive local stress caused by load concentration, and prevent the battery module from tilting during the hoisting process, effectively improving the safety and stability of the hoisting.

[0073] Optionally, the "hanging part 21" in this embodiment can be set to one, or two or more. Figure 3 The case where two hanging parts 21 are provided is shown in FIG.

[0074] Further, see Figure 3 as well as Figure 5 As shown, the end plate 20 in this embodiment includes a first surface 201 and a second surface 202 opposite to the first surface 201, the first surface 201 is in contact with the battery cell assembly 10, and the second surface 202 is provided with a limiting portion 22, the limiting portion 22 includes two limiting ribs 221, the two limiting ribs 221 are spaced apart along the height direction of the battery module to form a limiting space 222 between the two limiting ribs 221, and the fixing belt 30 is arranged in the limiting space 222.

[0075] Specifically, when the fixing belt 30 is used to bundle the end plate 20 and multiple battery cells 11 of the battery module, the fixing belt 30 can pass through the limiting space 222, so that the limiting ribs 221 on both sides of the limiting space 222 can limit the fixing belt 30, thereby helping to reduce the possibility of sliding and deflection of the fixing belt 30, improving the reliability and stability of the installation of the fixing belt 30, and improving the stability of the connection between the battery cell 11 and the end plate 20, effectively ensuring the normal use of the battery module.

[0076] For example, see Figure 3 as well as Figure 5 As shown, in the present embodiment, on the basis of two limiting ribs 221 being spaced apart along the height direction of the battery module, two limiting ribs 221 can also be spaced apart along the width direction of the battery module (that is, the two limiting ribs 221 are staggered on the second surface 202), so that there is a certain distance between the two limiting ribs 221, so that the fixing belt 30 can be subjected to forces in two different directions, which is further beneficial to improve the stability and reliability of the installation of the fixing belt 30 on the end plate 20, and effectively prevent the fixing belt 30 from offsetting and sliding during the transportation and use of the battery module.

[0077] Furthermore, the limiting portion 22 in this embodiment includes at least one, and at least one limiting portion 22 is disposed on the second surface 202 to at least limit and fix the fixing belt 30. Optionally, the limiting portion 22 in this embodiment can be provided as one, or two or more. Figure 3 2 shows the situation when there are four limit parts 22. It can be understood that two of the four limit parts 22 in this embodiment can limit and fix one fixing belt 30, and the other two of the four limit parts 22 can limit and fix another fixing belt 30.

[0078] Specifically, in order to further improve the limiting effect of the end plate 20 on the fixing belt 30, see Figure 3 as well as Figure 5 As shown, the second surface 202 of this embodiment is provided with an insertion slot 23 , and the battery module includes a supporting portion 24 , which is detachably disposed in the insertion slot 23 to at least limit and fix the fixing belt 30 .

[0079] Specifically, after the fixing belt 30 is installed, the position of the fixing belt 30 on the end plate 20 may be offset due to battery expansion during use of the battery module or shaking of the battery module during transportation. To this end, the present embodiment provides an insertion slot 23 on the second surface 202 of the end plate 20, and inserts the supporting portion 24 into the insertion slot 23, so that the supporting portion 24 is located below the fixing belt 30 and abuts against the fixing belt 30. In this way, when the fixing belt 30 is offset due to battery expansion force or shaking, the presence of the supporting portion 24 can provide a resisting force for the fixing belt 30 to offset the offset of the fixing belt 30, thereby limiting the fixing belt 30, which is conducive to reducing the possibility of the fixing belt 30 offsetting and sliding during transportation and use of the battery module, improving the stability of the fit between the fixing belt 30 and the end plate 20, and further facilitating the stability of the connection between the battery module and the end plate 20.

[0080] Furthermore, the two limiting ribs 221 in this embodiment are fixedly connected to the fixing belt 30 by means of interference fit. That is to say, when the fixing belt 30 is installed between the two limiting ribs 221, the size of the fixing belt 30 is slightly larger than the distance between the two limiting ribs 221, so that the fixing belt 30 can be ensured to remain stable during the transportation and use of the battery module without causing the fixing belt 30 to deviate and slide due to vibration or other external forces. At the same time, the two limiting ribs 221 in this embodiment are fixedly connected to the fixing belt 30 by means of interference fit, which can also reduce the use of additional connectors (such as screws or rivets), thereby simplifying the assembly process.

[0081] Specifically, when the fixing belt 30 is used to bundle the end plate 20 and the multiple cells 11 of the battery module, the end plate 20 needs to be installed at the two opposite ends along the length direction of the cell assembly 10, and then pressure is applied to the end plate 20 in the direction of the cell 11, so that the end plate 20 and the cell assembly 10 are squeezed to the size set by the fixing belt 30, and then the fixing belt 30 is sleeved between the two limiting ribs 221 on the end plate 20, and the supporting portion 24 is installed in the plug-in slot 23 to abut against the fixing belt 30. In the process of sleeve-mounting the fixing belt 30 between the two limiting ribs 221, since the two limiting ribs 221 and the fixing belt 30 are fixedly connected by interference fit, a certain pressure needs to be applied to the fixing belt 30 to embed the fixing belt 30 between the two limiting ribs 221.

[0082] Further, see Figure 1 as well as Figures 14 to 16 As shown, the battery module in this embodiment includes an insulating plate 40, a protective circuit board 50 and a signal connector 60. Among them, the insulating plate 40 is covered on the top of the battery cell assembly 10; the protective circuit board 50 is arranged on the insulating plate 40, and the protective circuit board 50 includes a signal acquisition component 51 and a circuit board body 52, and the signal acquisition component 51 and the circuit board body 52 are electrically connected; the signal connector 60 is arranged on the top surface of one of the two end plates 20, and the signal connector 60 is electrically connected to the signal acquisition component 51 through the circuit board body 52. ​​It can be understood that the "signal acquisition component 51" in this embodiment includes a temperature sensor, a voltage detector, etc., which are at least used to collect signals such as temperature and voltage of each battery cell 11.

[0083] Specifically, since the signal connector 60 in this embodiment is disposed on the top surface of the end plate 20 instead of being disposed on the circuit board body 52, when the wiring harness of the battery management system and other structures is connected to the signal connector 60, the circuit board body 52 on the protection circuit board 50 will not be affected by the external force applied to the signal connector 60 and the connection force between the signal connector 60 and the wiring harness, and the circuit board body 52 is effectively prevented from being deformed, thereby ensuring the normal operation of the circuit board body 52, and further realizing the collection and transmission of signals such as the voltage and temperature of the battery module. Since in this embodiment, by installing the signal connector 60 on the top surface of the end plate 20, the wiring harness connected to the signal connector 60 can be located outside the battery module, so that the space occupied by the signal connector 60 and the wiring harness on the protection circuit board 50 can be reduced, and the space utilization rate inside the battery module can be improved. In addition, the signal acquisition component 51 on the protection circuit board 50 in this embodiment can transmit the temperature, voltage and other signals of each battery cell 11 to the signal connector 60, and then connect to the sampling device (such as the battery management system) through the signal connector 60 to realize the collection of the voltage, temperature and other signals of the battery module. In addition, the setting of the insulating plate 40 in this embodiment can prevent the battery module from short circuiting.

[0084] Specifically, the insulating plate 40 in this embodiment is processed by vacuum forming, so that the weight of the insulating plate 40 can be reduced, thereby reducing the overall weight of the battery module, facilitating miniaturization design, and at the same time, since the mold cost of vacuum forming is low, the production cost of the battery module can be reduced.

[0085] Further, see Figure 3 to Figure 4 As shown, a drainage groove 25 is provided on the top surface of the end plate 20 in this embodiment. The drainage groove 25 has a first drainage end 2501 close to the battery cell assembly 10 and a second drainage end 2502 away from the battery cell assembly 10. Along the direction from the first drainage end 2501 to the second drainage end 2502, the drainage groove 25 is inclined toward the bottom surface of the battery module.

[0086] Specifically, since the signal connector 60 in this embodiment generates heat during use, when the temperature of the external environment is lower than the temperature of the heat generated by the signal connector 60, water vapor near the signal connector 60 will form condensed water on the top surface of the end plate 20 due to condensation. If the condensed water is not processed in time, the insulation and withstand voltage performance of the signal connector 60 will be reduced. To this end, in this embodiment, by providing a drainage groove 25 on the top surface of the end plate 20, the condensed water formed on the top surface of the end plate 20 can be discharged along the drainage groove 25, preventing the condensed water from accumulating on the top surface of the end plate 20, thereby preventing the condensed water from having an adverse effect on the insulation and withstand voltage performance of the signal connector 60. At the same time, since the drainage groove 25 in this embodiment is inclined toward the bottom surface of the battery module, it is convenient for condensed water to flow from the first drainage end 2501 of the drainage groove 25 close to the battery cell assembly 10 toward the second drainage end 2502 of the drainage groove 25 away from the battery cell assembly 10, so that any condensed water accumulated on the top surface of the end plate 20 can flow out of the end plate 20 smoothly, effectively preventing the condensed water from having an adverse effect on the insulation and voltage resistance performance of the signal connector 60.

[0087] Further, see Figure 3 As shown, the drainage groove 25 in this embodiment includes one or more drainage grooves. When there are multiple drainage grooves 25, the multiple drainage grooves 25 are arranged at intervals on the top surface of the end plate 20 along the width direction of the battery module, and at least one drainage groove 25 is located at the bottom of the signal connector 60. In other words, when there is one drainage groove 25, the drainage groove 25 is located at the bottom of the signal connector 60; when there are multiple drainage grooves 25, the bottom of the signal connector 60 can be provided with one drainage groove 25, two drainage grooves 25, or more than two drainage grooves 25. The appended drawings of this embodiment show that the drainage groove 25 is arranged at the bottom of the signal connector 60. Figure 22 shows the situation when two drainage grooves 25 are provided at the bottom of the signal connector 60. With such a configuration, the condensed water at the bottom of the signal connector 60 can be discharged in time, effectively preventing the condensed water from accumulating at the bottom of the signal connector 60, reducing the risk of failure of the signal connector 60 due to condensed water, extending the service life of the signal connector 60, and improving the safety of the battery module.

[0088] Further, see Figure 14 to Figure 15 As shown, the battery module in this embodiment includes a conductive connecting piece 55, which is arranged on the insulating plate 40 and connected between the battery cell assembly 10 and the protection circuit board 50, and the conductive connecting piece 55 has a conductive portion 551 for being clamped by a conductive clip to charge the battery cell 11.

[0089] Specifically, since the conductive connecting sheet 55 in this embodiment is provided with a conductive portion 551, when there is a problem with the consistency between the various battery cells 11, such as the difference in capacity and voltage between the battery cells 11, the conductive portion 551 can be clamped by a conductive clamp, and then the conductive clamp is energized, so that a single battery cell 11 can be charged to adjust the charge of the battery cell 11 so that the charge of each battery cell 11 is consistent. In this process, since the present embodiment charges the battery cell 11 by clamping the conductive portion 551 of the conductive connecting sheet 55 by a conductive clamp, rather than charging the battery cell 11 by using the current transmission function of the protection circuit board 50, in this way, a larger current (for example, a current of 20A, 30A, or 50A) can be applied to the conductive clamp to realize the charging process of the battery cell 11, rather than realizing the charging process of the battery cell 11 by using a smaller current (less than 5A) transmitted by the protection circuit board 50, thereby improving the charging efficiency of the battery module, reducing the energy loss of the battery cell 11, and extending the service life of the battery cell 11 to a certain extent.

[0090] Further, in order to facilitate the conductive clip to clamp the conductive portion 551 and to improve the connection strength between the conductive clip and the conductive connecting sheet 55, see Fig.15 As shown, the conductive connecting sheet 55 in this embodiment is provided with an insertion opening 552 , and the conductive connecting sheet 55 is located between the insertion opening 552 and the outer edge of the conductive connecting sheet 55 to form a conductive portion 551 .

[0091] Specifically, since the conductive connecting sheet 55 in this embodiment is provided with an insertion port 552, when there is a problem with the consistency between the various battery cells 11, the conductive clamp can be opened so that one clamping section of the conductive clamp extends into the insertion port 552, and the other clamping section of the conductive clamp is located at the outer edge of the conductive connecting sheet 55, so that the conductive clamp can clamp the conductive part 551, so that the current can be better conducted to charge the battery cell 11, and finally the charge amount of the battery cell 11 can be adjusted. In other words, the provision of the insertion port 552 in this embodiment facilitates the conductive clamp to clamp the conductive part 551; and the provision of the conductive part 551 can improve the connection strength between the conductive clamp and the conductive connecting sheet 55, and at the same time improve the current conduction efficiency.

[0092] Further, as shown in the figure, there is an escape space between the outer peripheral side of the conductive connecting piece 55 and the insulating plate 40 in this embodiment, and the escape space is arranged close to the conductive portion 551 .

[0093] Specifically, since the conductive connecting sheet 55 in this embodiment is disposed on the insulating plate 40, if the conductive connecting sheet 55 and the insulating plate 40 are closely attached to each other and there is no gap for the conductive clamp to clamp, it will make it difficult to adjust the electrical performance of a single battery cell 11. For this reason, in this embodiment, an escape space is provided between the outer peripheral side of the conductive connecting sheet 55 and the insulating plate 40, and the escape space is provided close to the conductive portion 551. In this way, the existence of the escape space can avoid the conductive clamp, thereby providing a clamping space for the conductive clamp, which is convenient for the conductive clamp to clamp the conductive portion 551.

[0094] Further, see Fig.15 as well as Fig.17 As shown, the insulating plate 40 in this embodiment is provided with a recessed portion 41 on the side facing away from the battery cell 11, a conductive connecting sheet 55 is provided in the recessed portion 41, and an extension portion 42 for avoiding the conductive clip to clamp the conductive portion 551 is provided at the outer edge of the recessed portion 41 near the conductive portion 551, and the extension portion 42 forms the above-mentioned avoidance space.

[0095] Specifically, the setting of the recessed portion 41 provides an installation space for the conductive connecting piece 55, which facilitates the installation and fixation of the conductive connecting piece 55, thereby preventing the conductive connecting piece 55 from shifting due to vibration and impact during the transportation and use of the battery module, and effectively ensuring the stability of the internal structure of the battery module. At the same time, the setting of the extended portion 42 in this embodiment can provide a clamping space for the conductive clip, which facilitates the conductive clip to clamp the conductive portion 551.

[0096] Furthermore, along the height direction of the battery module, the top surface of the extension portion 42 in this embodiment is lower than the bottom surface of the recessed portion 41, and the depth h of the extension portion 42 satisfies the relationship: 0.5mm≤h≤1.5mm, for example, h can be 0.5mm, 0.6mm, 0.7mm, 0.8mm, 0.9mm, 1mm, 1.1mm, 1.2mm, 1.3mm, 1.4mm, 1.5mm, etc. When h is less than 0.5mm, the depth of the extension portion 42 is too shallow, so that the bottom surface of the extension portion 42 is basically flush with the bottom surface of the recessed portion 41, and the extension portion 42 cannot provide enough escape space for the conductive clip to clamp the conductive portion 551, which increases the difficulty of the conductive clip clamping the conductive portion 551; when h is greater than 1.5mm, the depth of the extension portion 42 is too deep, thereby reducing the structural strength of the insulating plate 40, causing the insulating plate 40 to be deformed or damaged when the battery module is impacted by external force. That is to say, in this embodiment, by making the depth h of the extension portion 42 satisfy the relationship: 0.5mm≤h≤1.5mm, it can not only provide sufficient avoidance space for the conductive clip to facilitate the conductive clip to clamp the conductive portion 551, but also enhance the structural strength of the insulating plate 40 to a certain extent, thereby preventing the insulating plate 40 from being damaged.

[0097] Further, see Fig.16 As shown, the conductive connecting sheet 55 in this embodiment includes at least one sheet, and the conductive connecting sheet 55 is connected to the battery cell 11 one by one, and each conductive connecting sheet 55 is provided with a conductive portion 551 for clamping by a conductive clip to charge each battery cell 11. In this way, each battery cell 11 can be charged by each conductive portion 551 to adjust the charge of each battery cell 11 so that the charge of each battery cell 11 is consistent. Optionally, the "conductive connecting sheet 55" in this embodiment can be set to one sheet, or two sheets or more. Fig.16 FIG. 2 shows a case where the number of conductive connecting sheets 55 is fourteen.

[0098] Further, see Fig.15 As shown, the battery module in this embodiment includes at least one conductive member 80 and at least one conductive connecting piece 55, the conductive member 80 and the conductive connecting piece 55 are arranged in a one-to-one correspondence, and the conductive member 80 is connected between the conductive connecting piece 55 and the protection circuit board 50; the protection circuit board 50 has at least one signal acquisition component 51, the signal acquisition component 51 is connected to the conductive connecting piece 55 in a one-to-one correspondence, and the signal acquisition component 51 is connected between the conductive connecting piece 55 and the protection circuit board 50.

[0099] Specifically, the signal acquisition component 51 in this embodiment includes a temperature sensor, which is used to collect the temperature of the battery cell 11. By connecting the temperature sensor to the conductive connecting sheet 55 in a one-to-one correspondence, this embodiment can monitor the temperature of each battery cell 11 in real time to prevent the battery cell assembly 10 from being damaged due to excessive temperature. The protective circuit board 50 can control the charging and discharging of the battery cell assembly 10 according to the data collected by the temperature sensor to prevent the battery cell assembly 10 from being overcharged or over-discharged, thereby extending the service life of the battery cell assembly 10. At the same time, the conductive member 80 is connected between the conductive connecting sheet 55 and the protective circuit board 50 to ensure the reliability of the connection and reduce faults caused by poor connection. By way of example, the "conductive member 80" in this embodiment includes a nickel sheet.

[0100] Optionally, the "conductive member 80" in this embodiment can be set to one, or two or more, and the "signal acquisition member 51" can be set to one, or two or more. The number of the conductive member 80 and the signal acquisition member 51 can be designed according to the number of the battery cells 11. Fig.16 FIG. 4 shows a situation where the number of the conductive members 80 and the number of the signal collecting members 51 are both fourteen.

[0101] Furthermore, the signal collection element 51 in this embodiment has a signal line (not shown in the drawings) and a ground line (not shown in the drawings); see Fig.16 As shown, in the embodiment shown in the present application, at least two signal collecting components 51 are arranged between every two adjacent conductive components 80, and the grounding lines of the signal collecting components 51 located between the two adjacent conductive components 80 are arranged in a colinear manner.

[0102] For example, in this embodiment, “at least two signal collection components 51 are arranged between every two adjacent conductive components 80” means that the signal collection components 51 between every two adjacent conductive components 80 can be two, three or more. Fig.16 FIG. 4 shows a situation where two signal collecting components 51 are arranged between two adjacent conductive components 80 .

[0103] Specifically, since the conductive member 80 itself has a power line, when the conductive member 80 and the signal acquisition member 51 are arranged alternately (i.e., there is a conductive member 80 between every two adjacent signal acquisition members 51), the power line of the conductive member 80 will block the grounding line of the signal acquisition member 51, so that the grounding line needs to bypass the power line of the conductive member 80 before connecting to the signal connector 60 of the battery module, and the grounding lines of each signal acquisition member 51 cannot be colinear, thereby increasing the number of wiring harnesses on the protection circuit board 50 and increasing the manufacturing cost. For this reason, in this embodiment, at least two signal acquisition members 51 are arranged between every two adjacent conductive members 80, so that the grounding line of the temperature sensor located between two adjacent conductive members 80 can be connected together without bypassing the power line of the conductive member 80, thereby reducing the number of wiring harnesses on the protection circuit board 50 and reducing the manufacturing cost.

[0104] Further, see Figure 2 as well as Fig.18 As shown, the battery cell assembly 10 in this embodiment is provided with a pressure relief portion 12, and the protection circuit board 50 is provided with an avoidance hole 53 corresponding to the pressure relief portion 12; the battery module includes a battery cover 70, the battery cover 70 is covered on the protection circuit board 50, and the battery cover 70 is provided with a vent portion 71, and the vent portion 71 is provided corresponding to the pressure relief portion 12; wherein, when the battery cell assembly 10 is in a thermal runaway state, the electrolyte of the battery cell assembly 10 is released from the pressure relief portion 12 and sprayed toward the vent portion 71, so that the vent portion 71 is subjected to force and is flushed open.

[0105] Specifically, since the protection circuit board 50 in this embodiment is provided with avoidance holes 53 corresponding to the pressure relief parts 12 of each battery cell 11, that is, there is no obstruction at the position corresponding to the pressure relief parts 12 of the battery cell 11 on the protection circuit board 50, when thermal runaway occurs, the high-temperature objects (such as electrolyte) in the battery cell 11 can be depressurized to the outside. At the same time, since the battery cover 70 in this embodiment is covered on the protection circuit board 50, and the battery cover 70 is provided with an exhaust portion 71 corresponding to the pressure relief portion 12 of each battery cell 11, when the battery cell 11 is in a thermal runaway state, the electrolyte in the battery cell 11 will break through the pressure relief portion 12 due to the excessive internal pressure of the battery cell 11 and spray out in the direction of the exhaust portion 71, so as to reduce the temperature of the battery cell 11 and achieve the purpose of pressure relief, and prevent the battery cell 11 from further explosion and other more serious safety problems. After the ejected electrolyte opens the exhaust portion 71 on the battery cover 70, the electrolyte will fall back onto the battery cover 70 instead of flowing onto the battery cell 11 or the protection circuit board 50 to contact with other normal components and cause a short circuit, thereby effectively improving the safety of the battery module.

[0106] Further, see Fig.19As shown, the exhaust portion 71 in this embodiment includes a valve body 72, a first connecting rib 73 and a valve sheet 74. The valve body 72 is installed on the battery cover 70, and the valve body 72 is provided with a mounting opening (not shown in the drawings) that passes through the thickness direction of the battery cover 70. The valve sheet 74 covers the mounting opening, and the first connecting rib 73 is connected between the valve sheet 74 and the valve body 72.

[0107] Specifically, the valve body 72 in this embodiment plays the role of a mounting base, and the arrangement of the valve body 72 ensures that the entire exhaust portion 71 can be firmly mounted on the battery cover 70; at the same time, the arrangement of the mounting port provides a channel for high-temperature objects such as electrolyte sprayed from the battery cell 11, so that the electrolyte and the like can be effectively discharged, and the electrolyte is prevented from directly flowing to the battery cell 11 or the battery protection board and contacting other normal components to cause a short circuit; and when the exhaust portion 71 is not broken by a high-temperature object such as an electrolyte, the arrangement of the valve sheet 74 can prevent other foreign substances such as dust or water vapor from entering, thereby preventing dust or water vapor from contacting the battery cell 11 and causing a short circuit or affecting the performance of the battery cell 11; the arrangement of the first connecting rib 73 can connect the valve sheet 74 to the valve body 72, and prevent the valve sheet 74 from falling off when the exhaust portion 71 is not broken by a high-temperature object such as an electrolyte, and when the exhaust portion 71 is opened by a high-temperature object such as an electrolyte, the first connecting rib 73 will break, so that the valve sheet 74 can be opened.

[0108] That is to say, the valve sheet 74 in this embodiment is connected to the valve body 72 through the first connecting rib 73. When the battery cell 11 is in normal working condition, the existence of the valve sheet 74 can prevent dust or foreign matter from entering from the installation port to contact the battery cell 11, thereby protecting the pressure relief portion 12 from being damaged by dust or foreign matter, thereby effectively improving the performance of the battery cell 11; when the battery cell 11 is in a thermal runaway state, the first connecting rib 73 will break due to the impact force of high-temperature objects such as electrolyte, thereby causing the valve sheet 74 to be broken, so that high-temperature objects such as electrolyte are sprayed out from the opening 29 and fall on the battery cover 70, effectively improving the safety of the battery module.

[0109] Furthermore, along the thickness direction of the battery cover 70, the thickness of each first connecting rib 73 in this embodiment is smaller than the thickness of the valve sheet 74. With such a configuration, the structural strength of the first connecting rib 73 can be smaller than the structural strength of the valve sheet 74, that is, the first connecting rib 73 is a weak point of the exhaust portion 71. When the exhaust portion 71 is subjected to external force (such as the impact force of high-temperature gas), the first connecting rib 73 will break, causing the valve sheet 74 to separate from the valve body 72, so that high-temperature objects such as electrolyte can be ejected from the installation port and fall on the battery cover 70, effectively improving the safety of the battery module.

[0110] Further, see Fig.19As shown, there is a gap 75 between the outer edge of the valve sheet 74 and the edge of the mounting opening in this embodiment, and the first connecting rib 73 is located in the gap 75. Specifically, the provision of the gap 75 can reduce the structural strength of the valve sheet 74, so that the valve sheet 74 can be broken from the first connecting rib 73 when subjected to an external force, thereby exposing the mounting opening, thereby facilitating the electrolyte to be sprayed out from the mounting opening and fall onto the battery cover 70.

[0111] Further, see Figures 7 and 8 As shown, the battery module in this embodiment includes a protection circuit board 50, an electrode protection seat 27 and an electrode protection cover 28. Among them, the protection circuit board 50 is covered on the top of the battery cell assembly 10, and the output poles 54 are arranged at both ends of the length direction of the protection circuit board 50; the electrode protection seats 27 are respectively arranged on the top surfaces of the two end plates 20, and the electrode protection seats 27 are provided with a wiring portion 271; the electrode protection cover 28 is covered on the electrode protection seat 27 and enclosed with the electrode protection seat 27 to form an assembly space 2801, and the wiring portion 271 is located in the assembly space 2801. An opening 29 is provided on at least two different side walls of the electrode protection cover 28, and at least one of the two openings 29 is used for the output pole 54 to penetrate into the assembly space 2801 to connect with the wiring portion 271, and the other of the at least two openings 29 is used for the conductive connector to penetrate into the assembly space 2801 to connect with the output pole 54. It can be understood that the "conductive connector" in this embodiment includes a copper bus or a conductive cable.

[0112] Specifically, the battery module is usually arranged in the box of the battery pack, and multiple battery modules are arranged in a matrix in the box. The electrode protection seat 27 and the electrode protection cover 28 are usually arranged on the end plate 20 of the battery module, and are used to protect the output pole 54 of the protection circuit board 50, and the output pole 54 is connected to the wiring portion 271. Usually, multiple battery modules need to be connected to the corresponding output pole 54 through a conductive connector, so that multiple battery modules can be connected, or when the current of the battery module is to be input to the outside, it is also necessary to use a conductive connector to connect to the output pole 54. However, since the existing electrode protection cover 28 usually has only one opening 29, the conductive connector is inserted into the assembly space 2801 to connect with the output pole 54 in a single way, which reduces the space utilization rate in the battery pack to a certain extent, that is, the conductive connector can only be inserted into the electrode protection cover 28 from a single direction, thereby causing the length of the battery pack along a specific direction to be set too long.

[0113] For this purpose, see Figures 11 to 13In this embodiment, openings 29 are provided on at least two different side walls of the electrode protection cover 28, and one of the at least two openings 29 is used for the output pole 54 to penetrate into the assembly space 2801 to connect with the wiring portion 271, and the other of the at least two openings 29 is used for the conductive connector to penetrate into the assembly space 2801 to connect with the output pole 54. This means that the conductive connector can selectively select one of the at least two openings 29 and penetrate into the assembly space 2801 to connect with the output pole 54. In other words, when the battery module is penetrated with the conductive connector, the insertion direction can be selected according to the space conditions of the battery pack, thereby improving the space utilization rate in the battery pack to a certain extent. The structural arrangement of this embodiment can improve the adaptability of the electrode protection cover 28 to a certain extent.

[0114] In addition, the wiring portion 271 in this embodiment is provided with a fixing hole, and when the output pole 54 contacts the wiring portion 271, the output pole 54 is fixed to the wiring portion 271 through the fixing hole. In this embodiment, the output pole 54 can be a copper busbar.

[0115] Further, see Figure 11 to Figure 12 As shown, the opening 29 in this embodiment includes a first opening 291 and a second opening 292, the first opening 291 is used for the output pole 54 to penetrate into the assembly space 2801, and the second opening 292 is used for the conductive connector to penetrate into the assembly space 2801, and the electrode protection cover 28 includes a main body 281 and a surrounding plate 282 connected to the main body 281; wherein, in one embodiment of the present application, the first opening 291 is provided on a side of the surrounding plate 282 away from the main body 281, and the second opening 292 is provided on two opposite side walls of the surrounding plate 282; or, in another embodiment of the present application, the first opening 291 is provided on a side of the surrounding plate 282 away from the main body 281, and the second opening 292 is provided at the main body 281.

[0116] Specifically, when the first opening 291 is arranged on the side of the enclosure 282 away from the main body 281, and the second opening 292 is arranged on the two opposite side walls of the enclosure 282, the output pole 54 is vertically connected to the conductive connecting member; when the first opening 291 is arranged on the side of the enclosure 282 away from the main body 281, and the second opening 292 is arranged on the main body 281, the output pole 54 is horizontally connected to the conductive connecting member.

[0117] In addition, since the electrode protection cover 28 may be provided with a plurality of second openings 292, the plurality of second openings 292 may cause external dust or other impurities to enter the assembly space 2801, and eventually cause pollution or other effects on the wiring portion 271. Fig.13As shown, in this embodiment, a blocking portion 90 is provided on the electrode protection cover 28, and the blocking portion 90 is removably connected to the second opening 292. That is to say, when the conductive connecting member does not need to enter through the second opening 292, the blocking portion 90 at the second opening 292 is not removed, and the blocking portion 90 can block external dust and impurities; and when the conductive connecting member needs to enter through the second opening 292, the blocking portion 90 at the corresponding second opening 292 only needs to be removed to allow the conductive connecting member to pass through.

[0118] Further, see Fig.13 As shown, the blocking portion 90 includes a plate body 91 and a second connecting rib 92. The plate body 91 is laid at the second opening 292, and the second connecting rib 92 is breakably connected between the plate body 91 and the second opening 292. Specifically, when the assembler is assembling the conductive connector and the output pole 54, it is only necessary to apply a certain external force to the plate body 91. The plate body 91 is subjected to the external force and transmitted to the second connecting rib 92. The second connecting rib 92 is broken by the force, and finally the plate body 91 is separated from the second opening 292. At this time, the second opening 292 is open, and the conductive connector can be inserted into the assembly space 2801. In this embodiment, the second connecting rib 92 includes a plurality of second connecting ribs 92, and the plurality of second connecting ribs 92 are connected between the plate body 91 and the second opening 292 at intervals along the circumference of the plate body 91, thereby improving the connection strength between the plate body 91 and the second connecting rib 92, and preventing the plate body 91 from being separated from the second opening 292 when subjected to a weak external force.

[0119] Further, see Figures 9 and 10 As shown, the outer surface of the electrode protection seat 27 in this embodiment is provided with a first guide portion 272 and a second guide portion 273, the first guide portion 272 extends along the height direction of the battery module, and the second guide portion 273 extends along the length direction of the battery module and intersects the first guide portion 272 perpendicularly; the electrode protection cover 28 includes a first electrode protection cover 283 and a second electrode protection cover 284, the first electrode protection cover 283 is covered on the electrode protection seat 27 through the first guide portion 272, and the second electrode protection cover 284 is covered on the electrode protection seat 27 through the second guide portion 273.

[0120] Compared with the prior art, the electrode protection seat 27 in this embodiment is provided with a first guide portion 272 and a second guide portion 273 extending in different directions, and the first electrode protection cover 283 and the second electrode protection cover 284 can be covered on the electrode protection seat 27 in different directions through their respective corresponding first guide portions 272 and second guide portions 273. That is to say, the structure of this embodiment makes the electrode protection cover 28 and the electrode protection seat 27 no longer have a one-to-one corresponding setting relationship. One electrode protection seat 27 can be adapted to two different electrode protection covers 28, and the electrode protection seat 27 can be adapted to two electrode protection covers 28 covered on the electrode protection seat 27 in different directions, thereby improving the adaptability of the electrode protection seat 27.

[0121] Further, see Fig. 9 as well as Figure 11 to Figure 12 As shown, in this embodiment, a first guide matching portion 2831 is provided on the first electrode protection cover 283, and a second guide matching portion 2841 is provided on the second electrode protection cover 284, wherein the first guide matching portion 2831 cooperates with the first guide portion 272 to enable the first electrode protection cover 283 to be covered on the electrode protection seat 27 along the extension direction of the first guide portion 272, and the second guide matching portion 2841 cooperates with the second guide portion 273 to enable the second electrode protection cover 284 to be covered on the electrode protection cover 28 along the extension direction of the second guide portion 273.

[0122] Furthermore, in this embodiment, one of the first guide matching portion 2831 and the first guide portion 272 is configured as a first guide groove, and the other is configured as a first guide rib; one of the second guide matching portion 2841 and the second guide portion 273 is configured as a second guide groove, and the other is configured as a second guide rib. In this way, the first electrode protection cover 283 and the second electrode protection cover 284 can be limited and guided.

[0123] Specifically, when the first guide portion 272 is set as a first guide groove and the first guide matching portion 2831 is set as a first guide rib, in the process of assembling the first electrode protection cover 283, the first guide rib is firstly inserted into the corresponding first guide groove, and then an external force along the extension direction of the first guide groove is applied to the first electrode protection cover 283, so that the first electrode protection cover 283 is covered on the electrode protection seat 27; when the second guide portion 273 is set as a second guide groove and the second guide matching portion 2841 is set as a second guide rib, in the process of assembling the second electrode protection cover 284, the second guide rib is firstly inserted into the corresponding second guide groove, and then an external force along the extension direction of the second guide groove is applied to the second electrode protection cover 284, so that the second electrode protection cover 284 is covered on the electrode protection seat 27. Of course, in other embodiments of the present application, the first guide portion 272 can be set as a first guide rib, and the first guide matching portion 2831 can be set as a first guide groove; the second guide portion 273 can be set as a second guide rib, and the second guide matching portion 2841 can be set as a second guide groove.

[0124] Further, see Fig.10 As shown, the first guide groove in this embodiment includes a first plug end 2721, and the second guide groove includes a second plug end 2731. Chamfers are provided at the ports of the first plug end 2721 and the second plug end 2731.

[0125] Specifically, the first plug end 2721 is the end of the first guide rib that is first inserted into the first guide groove, and a chamfer is set at the port of the first plug end 2721, so that the opening 29 at the port is larger, which is convenient for the first guide rib to quickly penetrate into the first guide groove; the second plug end 2731 is the end of the second guide rib that is first inserted into the second guide groove, and a chamfer is set at the port of the second plug end 2731, so that the opening 29 at the port is larger, which is convenient for the second guide rib to quickly penetrate into the second guide groove. The structure is simple, and the operation is convenient and fast.

[0126] Furthermore, in this embodiment, one of the electrode protection seat 27 and the electrode protection cover 28 is provided with a buckle 274 inclined along the height direction of the battery module, and the other is provided with a slot 285 matched with the buckle 274.

[0127] Specifically, see Figures 7 and 8As shown, in one embodiment of the present application, a buckle 274 is provided on the electrode protection cover 28, and a slot 285 adapted to the buckle 274 is provided on the electrode protection seat 27. When the electrode protection cover 28 is covered on the electrode protection seat 27, the buckle 274 is snapped into the slot 285, thereby improving the connection stability between the electrode protection seat 27 and the electrode protection cover 28. In addition, in the present embodiment, the buckle 274 and the slot 285 are arranged obliquely along the height direction of the battery module, which means that no matter in which direction the electrode protection cover 28 is covered on the electrode protection cover 28, the contact surface between the buckle 274 and the slot 285 in each direction is large, thereby preventing the electrode protection cover 28 and the electrode protection seat 27 from being separated due to a large external force in a certain direction after the electrode protection cover 28 and the electrode protection seat 27 are assembled. For example, when the electrode protection cover 28 is subjected to an external force in the height direction, the inclined surface on the buckle 274 will exert a certain supporting force on the slot 285, and the supporting force can be decomposed in the height direction, thereby balancing the external force in the height direction to prevent the electrode protection cover 28 from separating from the electrode protection seat 27.

[0128] In addition, see Fig. 9 As shown, along the height direction of the battery module, the electrode protection seat 27 in this embodiment includes a main body section 275 and a connecting section 276 that are interconnected, the first guide portion 272 and the second guide portion 273 are both arranged on the main body section 275, and the connecting section 276 is provided with a connecting buckle 2761, which is used to be clamped on the top surface of the end plate 20.

[0129] Specifically, a mounting groove is provided on the end plate 20, and the connecting section 276 is installed in the mounting groove through the connecting buckle 2761. The first electrode protection cover 283 is covered on the main section 275 through the first guide portion 272, or the second electrode protection cover 284 is covered on the main section 275 through the second guide portion 273. In a specific embodiment, the first guide portion 272 and the second guide portion 273 are symmetrically provided on the two opposite side walls of the main section 275, that is, the electrode protection cover 28 can be covered on the electrode protection seat 27 along the height direction or the extension direction of the second guide portion 273 through two symmetrically provided first guide portions 272 or two symmetrically provided second guide portions 273, thereby improving the guiding and limiting effect of the electrode protection seat 27 on the electrode protection cover 28.

[0130] Further, see Fig. 9As shown, in this embodiment, a guide slope 2762 is provided on the side of the connecting buckle 2761 away from the main body section 275. In this embodiment, the guide slope 2762 facilitates the connection between the connecting section 276 and the end plate 20, that is, after an external force is applied to the connecting section 276 along the direction close to the end plate 20, the connecting section 276 passes through the mounting groove on the end plate 20. At this time, since the guide slope 2762 is provided on the side of the connecting section 276 away from the main body section 275, no excessive friction is generated between the guide slope 2762 and the mounting groove, so that the connecting buckle 2761 is conveniently connected to the mounting groove on the top surface of the end plate 20.

[0131] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0132] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0133] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery module, characterized in that: include: Battery cell assembly (10); End plates (20), the end plates (20) being arranged at both ends of the battery cell assembly (10) in the length direction, and the top surface of the end plates (20) being provided with a hanging portion (21); A hanging member (26), wherein the hanging member (26) is detachably mounted on the hanging portion (21); A fixing belt (30) is sleeved on the two end plates (20) and the outer periphery of the battery cell assembly (10) to fix the battery cell assembly (10) between the two end plates (20).

2. The battery module according to claim 1, characterized in that: One of the hanging portion (21) and the hanging piece (26) is provided with a threaded hole (211), and the other of the two is provided with a threaded column (261) matched with the threaded hole (211).

3. The battery module according to claim 1, characterized in that: The hanging parts (21) include one or more. When the hanging parts (21) include multiple, the multiple hanging parts (21) are arranged on the top surface of the end plate (20) at intervals along the width direction of the battery module.

4. The battery module according to any one of claims 1 to 3, characterized in that: The end plate (20) comprises a first surface (201) and a second surface (202) opposite to the first surface (201); the first surface (201) is in contact with the battery cell assembly (10); the second surface (202) is provided with a limiting portion (22); the limiting portion (22) comprises two limiting ribs (221); the two limiting ribs (221) are arranged at intervals along the height direction of the battery module to form a limiting space (222) between the two limiting ribs (221); the fixing belt (30) is arranged in the limiting space (222).

5. The battery module according to claim 4, characterized in that: The second surface (202) is provided with an insertion slot (23), and the battery module comprises a supporting portion (24), and the supporting portion (24) is detachably arranged in the insertion slot (23) to at least limit and fix the fixing belt (30).

6. The battery module according to any one of claims 1 to 3, characterized in that: The battery module comprises: An insulating plate (40), the insulating plate (40) being arranged to cover the top of the battery cell assembly (10); A protection circuit board (50), the protection circuit board (50) being arranged on the insulating plate (40), the protection circuit board (50) comprising a signal collection component (51) and a circuit board body (52), the signal collection component (51) and the circuit board body (52) being electrically connected; A signal connector (60), wherein the signal connector (60) is arranged on the top surface of one of the two end plates (20), and the signal connector (60) is electrically connected to the signal collection component (51) through the circuit board body (52).

7. The battery module according to claim 6, characterized in that: A drainage groove (25) is provided on the top surface of the end plate (20), and the drainage groove (25) has a first drainage end (2501) close to the battery cell assembly (10) and a second drainage end (2502) away from the battery cell assembly (10), and along the direction from the first drainage end (2501) to the second drainage end (2502), the drainage groove (25) is inclined toward the bottom surface of the battery module.

8. The battery module according to claim 6, characterized in that: The battery module comprises a conductive connecting sheet (55), the conductive connecting sheet (55) being arranged on the insulating plate (40) and connected between the battery cell assembly (10) and the protective circuit board (50), and the conductive connecting sheet (55) having a conductive portion (551) for being clamped by a conductive clip to charge the battery cell assembly (10).

9. The battery module according to claim 8, characterized in that: The conductive connecting piece (55) is provided with an insertion opening (552), and the conductive portion (551) is formed in an area of ​​the conductive connecting piece (55) between the insertion opening (552) and the outer edge of the conductive connecting piece (55).

10. The battery module according to claim 8, characterized in that: A recessed portion (41) is provided on a side of the insulating plate (40) facing away from the battery cell assembly (10), the conductive connecting sheet (55) is provided in the recessed portion (41), and an extended portion (42) is provided near the outer edge of the conductive portion (551) of the recessed portion (41) for preventing the conductive clip from clamping the conductive portion (551).

11. The battery module according to claim 6, characterized in that: The battery core assembly (10) is provided with a pressure relief portion (12), and the protection circuit board (50) is provided with an avoidance hole (53) corresponding to the pressure relief portion (12); The battery module comprises a battery cover plate (70), the battery cover plate (70) is covered on the protection circuit board (50), an exhaust portion (71) is provided on the battery cover plate (70), and the exhaust portion (71) is arranged corresponding to the pressure relief portion (12); When the battery cell assembly (10) is in a thermal runaway state, the electrolyte of the battery cell assembly (10) is released from the pressure relief portion (12) and sprayed toward the exhaust portion (71), so that the exhaust portion (71) is subjected to force and is flushed open.

12. The battery module according to claim 11, characterized in that: The exhaust portion (71) comprises a valve body (72), a first connecting rib (73) and a valve plate (74); the valve body (72) is mounted on the battery cover (70), and the valve body (72) is provided with a mounting opening that passes through the battery cover (70) in the thickness direction; the valve plate (74) covers the mounting opening; and the first connecting rib (73) is connected between the valve plate (74) and the valve body (72).

13. The battery module according to any one of claims 1 to 3, characterized in that: The battery module comprises: A protective circuit board (50), the protective circuit board (50) being arranged to cover the top of the battery cell assembly (10), and output poles (54) being arranged at both ends of the protective circuit board (50) in the length direction; An electrode protection seat (27), the electrode protection seat (27) being respectively arranged on the top surfaces of the two end plates (20), and a wiring portion (271) being arranged on the electrode protection seat (27); An electrode protection cover (28), wherein the electrode protection cover (28) is covered on the electrode protection seat (27) and encloses an assembly space (2801) with the electrode protection seat (27), the wiring portion (271) is located in the assembly space (2801), and openings (29) are provided on at least two different side walls of the electrode protection cover (28), at least one of the two openings (29) is used for allowing the output pole (54) to penetrate into the assembly space (2801) to connect with the wiring portion (271), and the other of the two openings (29) is used for allowing a conductive connector to penetrate into the assembly space (2801) to connect with the output pole (54).

14. The battery module according to claim 13, characterized in that: The opening (29) comprises a first opening (291) and a second opening (292), the first opening (291) being used for allowing the output pole (54) to penetrate into the assembly space (2801), and the second opening (292) being used for allowing the conductive connecting member to penetrate into the assembly space (2801), and the electrode protection cover (28) comprising a main body (281) and a surrounding plate (282) connected to the main body (281); Wherein, the first opening (291) is provided on a side of the enclosure (282) away from the main body (281), and the second opening (292) is provided on two opposite side walls of the enclosure (282); or, The first opening (291) is provided on a side of the enclosure (282) away from the main body (281), and the second opening (292) is provided on the main body (281).

15. The battery module according to claim 13, characterized in that: The outer surface of the electrode protection seat (27) is provided with a first guide portion (272) and a second guide portion (273), the first guide portion (272) extending along the height direction of the battery module, and the second guide portion (273) extending along the length direction of the battery module and perpendicularly intersecting the first guide portion (272); The electrode protection cover (28) comprises a first electrode protection cover (283) and a second electrode protection cover (284); the first electrode protection cover (283) is covered on the electrode protection seat (27) through the first guide portion (272); and the second electrode protection cover (284) is covered on the electrode protection seat (27) through the second guide portion (273).

16. The battery module according to claim 13, characterized in that: One of the electrode protection seat (27) and the electrode protection cover (28) is provided with a buckle (274) obliquely arranged along the height direction of the battery module, and the other of the two is provided with a slot (285) adapted to the buckle (274).

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