Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment. The battery pack comprises a shell, a buffer assembly and a battery cell module, the shell is provided with an accommodating cavity; the buffering assembly is arranged in the containing cavity and fixed to the inner side wall of the shell, and the buffering assembly can be compressed or extend in the first direction; a first guide surface is arranged between the top surface of the buffer assembly and the side surface of the inner side wall, back to the shell, of the buffer assembly; the battery cell module is assembled in the accommodating cavity; a second guide surface is arranged between the bottom surface of the battery cell module and the side surface, facing the inner side wall of the shell, of the battery cell module; and the second guide surface is used for being matched with the first guide surface. According to the battery pack and the electric equipment provided by the invention, the stability of the battery module in the shell is relatively good, auxiliary tools such as a clamp do not need to be additionally used in the assembling process of the battery pack, the assembling process of the battery pack is simple, the battery module can be conveniently put into a box for operation, and the labor intensity of assembling the battery pack by an operator is relatively low.

Description

Technical Field

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

[0002] In the battery pack placement solution provided by the prior art, a buffer structure (such as foam / silicone strip / aerogel) is provided between adjacent battery cells, and the end plate is pressed by a clamp before the battery pack is placed in the box, so that the length of the entire battery pack (i.e., end plate-battery cell-foam-battery cell-end plate) is less than the assembly length of the box, so that there is an assembly gap at both ends when the battery pack is assembled in the box. After the battery pack is placed in the box, the buffer structure between the battery cells rebounds or expands by withdrawing the clamp to fill the aforementioned assembly gap, so that the box provides a pre-tightening force for the battery pack. However, the buffer material is pasted between the battery cells, and a clamp is required to be used before the battery pack is placed in the box to make the length of the battery pack less than the assembly length of the box, and the clamp needs to be withdrawn after the battery pack is placed in the box to allow the buffer structure between the battery cells to rebound or expand. In this way, the process of placing the battery pack in the box needs to be assisted by a clamp to achieve assembly, which makes the process of placing the battery pack in the box complicated and the labor intensity of the operator assembling the battery pack is relatively high. Utility Model Content

[0003] In response to the shortcomings of the prior art, the present application provides a battery pack and electrical equipment. The battery module has good stability in the shell, and the battery pack does not require additional auxiliary tooling such as clamps during assembly. The assembly process of the battery pack is simple, the battery module is easy to put into the box, and the labor intensity of the operator in assembling the battery pack is low.

[0004] In one aspect, the present application provides a battery pack, comprising:

[0005] A housing having a receiving cavity;

[0006] a buffer assembly, disposed in the accommodating cavity and fixed on the inner side wall of the shell, the buffer assembly being configured to be compressed or extended along a first direction; a first guide surface being disposed between a top surface of the buffer assembly and a side surface of the buffer assembly facing away from the inner side wall of the shell; and

[0007] A battery cell module is assembled in the accommodating cavity; a second guide surface is arranged between the bottom surface of the battery cell module and the side surface of the battery cell module facing the inner wall of the shell, and the second guide surface is used to cooperate with the first guide surface.

[0008] In a possible implementation, the battery cell module includes a plurality of battery cells and an end cover, the end cover is used to fix the plurality of battery cells, and the second guide surface is arranged between a bottom surface of the end cover and a side surface of the end cover facing the inner wall of the shell.

[0009] In a possible embodiment, the buffer assembly includes a first flexible member and a first rigid member, and the first flexible member and the first rigid member are stacked along the first direction; the first flexible member is fixed on the inner wall of the shell, and the first flexible member is configured to be compressed or extended along the first direction; the first rigid member is arranged on the side of the first flexible member away from the inner wall of the shell, and a first inclined surface is arranged between the top surface of the first rigid member and the side surface of the first rigid member facing away from the inner wall of the shell.

[0010] In a possible embodiment, the buffer assembly also includes a second flexible member and a second rigid member, and the second flexible member and the second rigid member are stacked along the first direction; the second flexible member is arranged in the accommodating cavity and fixed on the inner wall of the shell, and the first flexible member and the second flexible member are respectively located on two opposite sides of the inner wall of the shell along the first direction; the second flexible member is configured to be compressed or extended along the first direction; the second rigid member is arranged on the side of the second flexible member away from the inner wall of the shell, the first rigid member and the second rigid member are spaced apart along the first direction, and a second inclined surface is arranged between the top surface of the second rigid member and the side surface of the second rigid member facing away from the inner wall of the shell.

[0011] In a possible embodiment, the end cover includes a first end cover and a second end cover, and the first end cover, the multiple battery cells and the second end cover are connected and arranged in sequence along the first direction; the multiple battery cells are clamped between the first end cover and the second end cover along the first direction; a third inclined surface is provided between the bottom surface of the first end cover and the side surface of the first end cover facing away from the multiple battery cells, and a fourth inclined surface is provided between the bottom surface of the second end cover and the side surface of the second end cover facing away from the multiple battery cells; the third inclined surface is used to contact with the first inclined surface, and the fourth inclined surface is used to contact with the second inclined surface.

[0012] In a possible embodiment, the battery cell module also includes a fixing strip, which is sleeved on the first end cover, the multiple battery cells and the second end cover to fix the first end cover, the multiple battery cells and the second end cover in connection; a first receiving groove is provided on a side of the first end cover away from the multiple battery cells, and a second receiving groove is provided on a side of the second end cover away from the multiple battery cells, at least part of the fixing strip is accommodated in the first receiving groove, and at least part of the fixing strip is accommodated in the second receiving groove.

[0013] In a possible embodiment, when the buffer component is in an extended state, the difference between the width of the accommodating cavity in the first direction and the width of the buffer component in the first direction is smaller than the width of the battery cell module in the first direction; when the buffer component is in a compressed state, the difference between the width of the accommodating cavity in the first direction and the width of the buffer component in the first direction is equal to the width of the battery cell module in the first direction.

[0014] In a possible implementation, the inclination angle of the first guide surface relative to the second direction is in the range of [20°, 45°], the inclination angle of the second guide surface relative to the second direction is in the range of [20°, 45°], and the second direction is different from the first direction.

[0015] In a possible implementation, a difference between an inclination angle of the first guide surface relative to the second direction and an inclination angle of the second guide surface relative to the second direction is in a range of [0, 10°].

[0016] In a possible embodiment, a guide strip is provided on a side of the buffer component away from the inner wall of the shell, and a guide groove is provided on an outer wall of the battery cell module; or, a guide groove is provided on a side of the buffer component away from the inner wall of the shell, and a guide strip is provided on an outer wall of the battery cell module; the guide strip cooperates with the guide groove.

[0017] On the other hand, the present application provides an electrical device, including:

[0018] The battery pack mentioned above; and

[0019] A load device, the battery pack is electrically connected to the load device.

[0020] The battery pack and electrical equipment provided by the present application, on the one hand, are fixed to the inner side wall of the shell by a buffer assembly, and the buffer assembly is configured to be compressed or extended along a first direction. When the battery cell module is assembled into the shell, the buffer assembly is subjected to an extrusion force in the first direction, and the buffer assembly will be compressed along the first direction. Since the buffer assembly will extend along the first direction, when the battery cell module is fully assembled into the shell, the buffer assembly is used to press the battery cell module into the shell. The battery modules in the battery pack formed by the assembly of this scheme are always in contact with the buffer assembly, and gapless assembly can be achieved, and after the battery pack is assembled, the buffer assembly can be used to provide a pre-tightening force to the battery module, so that the battery module is better in the shell. On the other hand, by providing a first guide surface between the bottom surface of the buffer assembly and the side surface of the inner side wall of the buffer assembly facing away from the shell, a second guide surface is also provided on the bottom surface of the battery cell module and the side surface of the inner side wall of the battery cell module facing the shell. When the battery cell module and the buffer assembly are assembled, the battery pack can be assembled by the second guide surface contacting the first guide surface, without the need for additional auxiliary tooling such as clamps, so that the assembly process of the battery pack is simple, the battery module is easy to put into the box, and the labor intensity of the operator in assembling the battery pack is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some implementation methods provided by the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 is an assembly diagram of a battery pack provided in one embodiment of the present application;

[0023] Figure 2 is an exploded view of a battery pack provided in one embodiment of the present application;

[0024] Figure 3 is a cross-sectional view of a battery pack provided in one embodiment of the present application;

[0025] Figure 4 yes Figure 3 The battery pack shown is a partial enlarged schematic diagram at A;

[0026] Figure 5 is a front view of a buffer assembly provided in one embodiment of the present application;

[0027] Figure 6 It is a front view of a battery cell module provided by one embodiment of the present application;

[0028] Figure 7 is a front view of another buffer assembly provided by an embodiment of the present application;

[0029] Figure 8 is a front view of another buffer assembly provided by an embodiment of the present application;

[0030] Fig. 9 It is a front view of a battery cell module provided in another embodiment of the present application.

[0031] Description of the accompanying figures:

[0032] Battery pack-100, shell-10, buffer assembly-30, battery cell module-50, accommodating cavity-11, first guide surface-31, first flexible part-32, first rigid part-33, second flexible part-34, second rigid part-35, second guide surface-51, first end cover-52, second end cover-53, battery cell group-54, first surface-301, second surface-302, first inclined surface-330, first rigid surface-331, second rigid surface-332, second inclined surface-350, third rigid surface-351, fourth rigid surface-352, third surface-501, fourth surface-502, third inclined surface-520, first end surface-521, second end surface-522, fourth inclined surface-530, third end surface-531, fourth end surface-532. DETAILED DESCRIPTION

[0033] The technical solution of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described implementation methods are only part of the implementation methods of the present application, rather than all the implementation methods. Based on the implementation methods in the present application, all other implementation methods obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present application.

[0034] The following descriptions of the embodiments are made with reference to the attached drawings to illustrate specific embodiments that the present application may be implemented in. The directional terms mentioned in the description of the present application, such as "upper", "lower", "front", "back", "left", "right", "inner", "outer", "bottom wall", "inner side wall", "outer side wall", etc., are only with reference to the directions of the attached drawings. Therefore, the directional terms used are for better and clearer description and understanding of the present application, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present application.

[0035] In the description of this application, for example, "first", "second", "third", "fourth", etc., are only used to distinguish the objects described and do not have any order or technical meaning. In the description of this application, the "connection" and "coupling" involved, unless otherwise specified, include direct connection (coupling) and indirect connection (coupling).

[0036] The present application provides an electrical device, which includes a battery pack and a load device. The battery pack is electrically connected to the load device, and the battery pack is used to provide electrical energy to the load device so that the load device can work normally.

[0037] In a specific embodiment, taking the electrical equipment as a vehicle as an example, the battery pack serves as the power battery of the vehicle and can provide electrical energy to load devices (motor, lights, displays and other on-board electrical devices) that require electrical energy during the operation of the vehicle, so that the vehicle can operate normally.

[0038] It is understandable that in some other embodiments, the electrical equipment may also be engineering machinery, transportation equipment, display equipment, etc. It is only necessary to ensure that the electrical equipment includes a power supply device (battery pack) and a load device, and this application does not impose any restrictions on this.

[0039] See also Figures 1 to 4 , Figure 1 is an assembly diagram of a battery pack provided in one embodiment of the present application, Figure 2 is an exploded view of a battery pack provided in one embodiment of the present application. Figure 3 is a cross-sectional view of a battery pack provided in one embodiment of the present application, Figure 4 yes Figure 3 The battery pack is shown as a partially enlarged schematic diagram at point A.

[0040] The present application provides a battery pack 100, which can be used in electrical equipment to provide electrical energy to the load device at the terminal of the electrical equipment. The battery pack 100 includes a shell 10, a buffer assembly 30 and a battery cell module 50. The buffer assembly 30 and the battery cell module 50 are accommodated in the shell 10. The buffer assembly 30 is clamped between the shell 10 and the battery cell module 50. The buffer assembly 30 is used to provide a pre-tightening force to the battery cell module 50, and the battery cell module 50 is used to provide electrical energy. The shell 10 has a receiving cavity 11. The buffer assembly 30 is disposed in the receiving cavity 11 and is fixed to the inner side wall of the shell 10. The buffer assembly 30 can be moved along a first direction (such as Figure 1 The buffer assembly 30 is compressed or extended in the first direction (as shown in the X-axis direction), that is, when the buffer assembly 30 is subjected to the extrusion force in the positive direction of the X-axis, the width of the buffer assembly 30 in the first direction is reduced, and when the extrusion force in the positive direction of the X-axis is removed, the buffer assembly 30 can extend in the first direction. Figure 1 The second direction is different from the first direction, and the second direction is perpendicular to the first direction.

[0041] The battery pack 100 and the electrical equipment provided in the present application are fixed to the inner wall of the shell 10 through the buffer assembly 30, and the buffer assembly 30 is configured to be compressed or extended along a first direction. When the battery cell module 50 is assembled into the shell 10, the buffer assembly 30 is subjected to an extrusion force in the first direction, and the buffer assembly 30 will be compressed along the first direction. Since the buffer assembly 30 will extend along the first direction, when the battery cell module 50 is fully assembled into the shell 10, the buffer assembly 30 is used to press the battery cell module 50 into the shell 10. The battery modules in the battery pack 100 assembled by this scheme always keep in contact with the buffer assembly 30, and gapless assembly can be achieved. After the battery pack 100 is assembled, the buffer assembly 30 can provide a pre-tightening force to the battery module to make the battery module more stable in the shell 10.

[0042] See also Figures 1 to 6 , Figure 5 is a front view of a buffer component provided in one embodiment of the present application, Figure 6 It is a front view of a battery cell module provided in one embodiment of the present application.

[0043] Further, the buffer assembly 30 includes a first surface 301 and a second surface 302, the first surface 301 is arranged opposite to the inner side wall of the housing 10 in the first direction, and the first surface 301 is arranged toward the inner side wall away from the housing 10. The second surface 302 is arranged opposite to the bottom wall of the housing 10 in the second direction, and the second surface 302 is arranged toward the bottom wall away from the housing 10. The buffer assembly 30 is provided with a first guide surface 31 at one end away from the bottom wall of the housing 10 and away from the inner side wall of the housing 10, that is, the first guide surface 31 is arranged between the top surface of the buffer assembly 30 and the side surface of the buffer assembly 30 facing away from the inner side wall of the housing 10, that is, the first guide surface 31 is arranged at the junction of the first surface 301 and the second surface 302 of the buffer assembly 30. The battery cell module 50 includes a third surface 501 and a fourth surface 502 which are connected and arranged, the third surface 501 is arranged opposite to the inner side wall of the housing 10 in the first direction, and the third surface 501 is arranged toward the inner side wall close to the housing 10. The fourth surface 502 is arranged opposite to the bottom wall of the housing 10 in the second direction, and the fourth surface 502 is arranged toward the bottom wall close to the housing 10. A second guide surface 51 is arranged on the outer side wall of the battery cell module 50 at one end close to the bottom wall of the housing 10, that is, the second guide surface 51 is arranged between the bottom surface of the battery cell module 50 and the side surface of the battery cell module 50 facing the inner side wall of the housing 10, that is, the second guide surface 51 is arranged at the junction of the third surface 501 and the fourth surface 502 of the battery cell module 50.

[0044] The battery pack 100 and the electrical equipment provided by the present application are provided with a first guide surface 31 at one end of the buffer assembly 30 away from the bottom wall of the housing 10 and away from the inner side wall of the housing 10, and a second guide surface 51 is provided on the outer side wall of the battery cell module 50 at one end close to the bottom wall of the housing 10. When the battery cell module 50 is assembled with the buffer assembly 30, the second guide surface 51 contacts the first guide surface 31, so that the battery cell module 50 can press the buffer assembly 30 along the first direction, and the assembly of the battery pack 100 can be realized without the use of additional auxiliary tooling such as clamps, so that the assembly process of the battery pack 100 is simple, the battery module is easy to put into the box, and the labor intensity of the operator to assemble the battery pack 100 is low.

[0045] In this embodiment, the first guide surface 31 is set as a plane to facilitate processing of the first guide surface 31 on the buffer assembly 30. The second guide surface 51 is set as a plane to facilitate processing of the second guide surface 51 on the battery module 50.

[0046] It is understandable that in some other embodiments, the first guide surface 31 can be an arc surface, a wavy surface, a serrated surface, etc., and the second guide surface 51 can be an arc surface, a wavy surface, a serrated surface, etc., and the present application does not impose any limitation on this.

[0047] It is understandable that the buffer assembly 30 can be fixedly connected to the inner wall of the housing 10 by bonding, snapping, etc.

[0048] See also Figures 1 to 4 It should be understood that when the buffer component 30 is in an extended state, the difference between the width of the accommodating cavity 11 in the first direction and the width of the buffer component 30 in the first direction is less than the width of the battery cell module 50 in the first direction. When the buffer component 30 is in a compressed state, the difference between the width of the accommodating cavity 11 in the first direction and the width of the buffer component 30 in the first direction is equal to the width of the battery cell module 50 in the first direction. Since the buffer component 30 is configured to be compressed in the first direction, when the battery cell module 50 is not assembled into the housing 10, the buffer component 30 is in an extended state, and the difference between the width of the accommodating cavity 11 in the first direction and the width of the buffer component 30 in the first direction is less than the width of the battery cell module 50 in the first direction. At this time, the battery cell module 50 and the buffer component 30 can be assembled into the housing 10 without a gap. Since the buffer component 30 is configured to extend in the first direction, when the battery cell module 50 is fully assembled into the housing 10, the buffer component 30 provides a pre-tightening force to the battery module to make the battery module more stable in the housing 10.

[0049] Among them, the difference between the width of the accommodating cavity 11 in the first direction and the width of the buffer component 30 in the first direction is smaller than the specific value of the width of the battery module 50 in the first direction, and can be designed according to the compressibility of the buffer component 30 in the first direction. For example: when the number of buffer components 30 is one, the compressibility of the buffer component 30 in the first direction is 10mm, and the difference between the width of the accommodating cavity 11 in the first direction and the width of the buffer component 30 in the first direction can be designed to be smaller than the specific value of the width of the battery module 50 in the first direction, which is 6mm, 8mm, 9mm, etc. It is only necessary to ensure that the difference between the width of the accommodating cavity 11 in the first direction and the width of the buffer component 30 in the first direction is smaller than the specific value of the width of the battery module 50 in the first direction and smaller than the compressibility of the buffer component 30 in the first direction.

[0050] See also Figures 1 to 6 In a specific embodiment, the range of the inclination angle α1 of the first guide surface 31 relative to the second direction is [20°, 45°], and the range of the inclination angle α2 of the second guide surface 51 relative to the second direction is [20°, 45°]. By limiting the range of the inclination angle α1 of the first guide surface 31 relative to the second direction, and limiting the range of the inclination angle α2 of the second guide surface 51 relative to the second direction, it is prevented that the inclination angle α1 of the first guide surface 31 relative to the second direction and the inclination angle α2 of the second guide surface 51 relative to the second direction are too small or too large, thereby preventing the battery cell module 50 and the buffer assembly 30 from having interference problems such as assembly collision and abutment during the assembly process.

[0051] See also Figures 1 to 6 In a specific embodiment, the difference between the inclination angle α1 of the first guide surface 31 relative to the second direction and the inclination angle α2 of the second guide surface 51 relative to the second direction is in the range of [0, 10°]. By limiting the range of the difference between the inclination angle α1 of the first guide surface 31 relative to the second direction and the inclination angle α2 of the second guide surface 51 relative to the second direction, it is prevented that the difference between the inclination angle α1 of the first guide surface 31 relative to the second direction and the inclination angle α2 of the second guide surface 51 relative to the second direction is too large, thereby preventing the battery cell module 50 and the buffer assembly 30 from being poorly assembled.

[0052] In another embodiment, a guide bar (not shown) is provided on the side of the buffer assembly 30 away from the inner side wall of the shell 10, and the guide bar extends along the second direction. A guide groove (not shown) is provided on the outer side wall of the battery cell module 50, and the guide groove extends along the second direction. The guide bar cooperates with the guide groove. In this way, the battery cell module 50 can be assembled with the buffer assembly 30 according to a predetermined track during the assembly process of the battery pack 100, which is beneficial to reduce the probability of assembly errors of the battery cell module 50, thereby improving the finished product yield of the battery pack 100.

[0053] It is understandable that in some other embodiments, a guide groove is provided on the side of the buffer assembly 30 away from the inner wall of the shell 10, and a guide strip is provided on the outer wall of the battery cell module 50, and the present application does not impose any limitation on this.

[0054] See also Figure 3 , Figure 4 and Figure 7 , Figure 7 It is a front view of another buffer component provided in one embodiment of the present application.

[0055] In one embodiment, the buffer assembly 30 includes a first flexible member 32 and a first rigid member 33, and the first flexible member 32 and the first rigid member 33 are stacked along a first direction. The first flexible member 32 is arranged in the accommodating cavity 11 and fixed on the inner side wall of the shell 10. The first flexible member 32 is attached to the inner side wall of the shell 10 along the first direction, and the first flexible member 32 is configured to be compressed or extended along the first direction. The first rigid member 33 is arranged on the side of the first flexible member 32 away from the inner side wall of the shell 10, and a first inclined surface 330 is arranged between the bottom surface of the first rigid member 33 and the side surface of the first rigid member 33 facing away from the first flexible member 32. When the battery module 50 is assembled with the first rigid member 33, the second guide surface 51 contacts the first inclined surface 330, so that the battery module 50 can squeeze the first flexible member 32 along the first direction, thereby enabling the battery module 50 to be assembled into the accommodating cavity 11 of the shell 10 along the second direction.

[0056] Specifically, the first rigid member 33 includes a first rigid surface 331 and a second rigid surface 332 that are connected and arranged, the first rigid surface 331 is arranged opposite to the inner side wall of the housing 10 in the first direction, and the first rigid surface 331 is arranged toward the inner side wall away from the housing 10. The second rigid surface 332 is arranged opposite to the bottom wall of the housing 10 in the second direction, and the second rigid surface 332 is arranged toward the bottom wall away from the housing 10. A first inclined surface 330 is arranged between the bottom surface of the first rigid member 33 and the side surface of the first rigid member 33 that faces away from the first flexible member 32, that is, the first inclined surface 330 is arranged at the junction of the first rigid surface 331 and the second rigid surface 332 of the first rigid member 33.

[0057] The battery pack 100 and the electrical equipment provided by the present application are provided with a first inclined surface 330 on one end of the first rigid part 33 away from the bottom wall of the housing 10 and away from the first flexible part 32, and a second guide surface 51 is provided between the bottom surface of the battery cell module 50 and the side surface of the battery cell module 50 facing the inner side wall of the housing 10. When the battery cell module 50 is assembled with the buffer assembly 30, the second guide surface 51 contacts the first inclined surface 330 of the first rigid part 33, so that the battery cell module 50 can squeeze the first flexible part 32 along the first direction, and the assembly of the battery pack 100 can be realized without the use of additional auxiliary tooling such as clamps, so that the assembly process of the battery pack 100 is simple, the battery module is easy to put into the box, and the labor intensity of the operator to assemble the battery pack 100 is low.

[0058] It is understandable that the material of the first flexible part 32 includes but is not limited to foam, silicone strips, aerogel, metal, etc. When the material of the first flexible part 32 is metal, the structure of the first flexible part 32 can be a compressible and resilient structure such as a spring, a spring, etc., and the present application does not impose any restrictions on this.

[0059] It is understandable that the material of the first rigid component 33 includes but is not limited to hard plastics such as PPO plastic and ABS plastic, and the present application does not impose any limitation on this.

[0060] See also Figure 3 , Figure 4 and Figure 8 , Figure 8 It is a front view of another buffer component provided by an embodiment of the present application.

[0061] In one embodiment, the buffer assembly 30 further includes a second flexible member 34 and a second rigid member 35, and the second flexible member 34 and the second rigid member 35 are stacked along the first direction. The second flexible member 34 is disposed in the accommodating cavity 11 and fixed on the inner side wall of the shell 10, and the second flexible member 34 is in contact with the inner side wall of the shell 10 along the first direction. The first flexible member 32 and the second flexible member 34 are respectively located on opposite sides of the inner side wall of the shell along the first direction; the second flexible member 34 is configured to be compressed or extended along the first direction. The second rigid member 35 is disposed on a side of the second flexible member 34 away from the inner side wall of the shell 10, the first rigid member 33 and the second rigid member 35 are spaced apart along the first direction, and a second inclined surface 350 is disposed between the top surface of the second rigid member 35 and the side surface of the second rigid member 35 facing away from the second flexible member 34. When the battery cell module 50 is assembled with the first rigid component 33 and the second rigid component 35, the second guide surface 51 contacts the first inclined surface 330 and the second inclined surface 350, so that the battery cell module 50 can squeeze the first flexible component 32 and the second flexible component 34 along the first direction, thereby enabling the battery cell module 50 to be assembled into the accommodating cavity 11 of the shell 10 along the second direction.

[0062] Specifically, the second rigid member 35 includes a third rigid surface 351 and a fourth rigid surface 352 which are connected and arranged, the third rigid surface 351 is arranged opposite to the inner side wall of the housing 10 in the first direction, and the third rigid surface 351 is arranged toward the inner side wall away from the housing 10. The fourth rigid surface 352 is arranged opposite to the bottom wall of the housing 10 in the second direction, and the fourth rigid surface 352 is arranged toward the bottom wall away from the housing 10. A second inclined surface 350 is arranged between the top surface of the second rigid member 35 and the side surface of the second rigid member 35 which faces away from the second flexible member 34, that is, the second inclined surface 350 is arranged at the junction of the third rigid surface 351 and the fourth rigid surface 352 of the second rigid member 35.

[0063] The battery pack 100 and the electrical equipment provided by the present application are provided with a first inclined surface 330 between the bottom surface of the first rigid part 33 and the side surface of the first rigid part 33 facing away from the first flexible part 32, and a second inclined surface 350 is provided between the bottom surface of the second rigid part 35 and the side surface of the second rigid part 35 facing away from the second flexible part 34, and a second guide surface 51 is provided between the bottom surface of the battery cell module 50 and the side surface of the battery cell module 50 facing the inner side wall of the housing 10. When the battery cell module 50 is assembled with the buffer assembly 30, the second guide surface 51 contacts the first inclined surface 330 of the first rigid part 33 and the second inclined surface 350 of the second rigid part 35, so that the battery cell module 50 can squeeze the first flexible part 32 and the second flexible part 34 along the first direction, so that the assembly of the battery pack 100 can be realized without the need to use additional auxiliary tooling such as clamps, so that the assembly process of the battery pack 100 is simple, the battery module is easy to put into the box, and the labor intensity of the operator to assemble the battery pack 100 is low.

[0064] It is understandable that the material of the second flexible part 34 includes but is not limited to foam, silicone strips, aerogel, metal, etc. When the material of the second flexible part 34 is metal, the structure of the second flexible part 34 can be a compressible and resilient structure such as a shrapnel or a spring, and the present application does not impose any restrictions on this.

[0065] It is understandable that the material of the second rigid component 35 includes but is not limited to hard plastics such as PPO plastic and ABS plastic, and the present application does not impose any limitation on this.

[0066] See also Figure 3 , Figure 4 , Figure 7 , Figure 8 and Fig. 9 , Fig. 9 It is a front view of a battery cell module provided in another embodiment of the present application.

[0067] In one embodiment, the battery cell module 50 includes an end cover and a plurality of battery cells, the plurality of battery cells are stacked in sequence along a first direction, and the end cover is used to fix the plurality of battery cells. The second guide surface 51 is disposed on the end cover of the battery cell module 50. In other embodiments, such as when the battery cell module 50 has no end cover, the second guide surface 51 may be designed on the battery cell at the end, and the present application does not impose any restrictions on this. When the battery cell module 50 is assembled with the buffer assembly 30, the second guide surface 51 contacts the first guide surface 31, so that the battery cell module 50 squeezes the buffer assembly 30 along the first direction, thereby enabling the battery cell module 50 to be assembled into the accommodating cavity 11 of the shell 10 along the second direction.

[0068] Specifically, the end cap includes a first end cap 52 and a second end cap 53, a plurality of cells are stacked along a first direction to form a cell group 54, the first end cap 52, the cell group 54 and the second end cap 53 are sequentially connected and arranged along the first direction, and the cell group 54 is sandwiched between the first end cap 52 and the second end cap 53. A third inclined surface 520 is provided between the bottom surface of the first end cap 52 and the side surface of the first end cap 52 facing the inner side wall of the housing 10, and a fourth inclined surface 530 is provided between the bottom surface of the second end cap 53 and the side surface of the first end cap 52 facing the inner side wall of the housing 10. When the cell module 50 is assembled with the buffer assembly 30, the third inclined surface 520 is used to contact the first inclined surface 330, and the fourth inclined surface 530 is used to contact the second inclined surface 350. So that the cell module 50 can press the first flexible member 32 and the second flexible member 34 along the first direction, so that the cell module 50 can be assembled into the accommodating cavity 11 of the housing 10 along the second direction.

[0069] More specifically, the first end cover 52 includes a first end face 521 and a second end face 522, wherein the first end face 521 is arranged opposite to the inner side wall of the housing 10 in the first direction, and the first end face 521 is arranged toward the inner side wall close to the housing 10. The second end face 522 is arranged opposite to the bottom wall of the housing 10 in the second direction, and the second end face 522 is arranged toward the bottom wall close to the housing 10. A third inclined surface 520 is arranged between the bottom surface of the first end cover 52 and the side surface of the first end cover 52 facing the inner side wall of the housing 10, that is, the third inclined surface 520 is arranged at the junction of the first end face 521 and the second end face 522 of the first end cover 52.

[0070] More specifically, the second end cover 53 includes a third end face 531 and a fourth end face 532, wherein the third end face 531 is arranged opposite to the inner side wall of the housing 10 in the first direction, and the third end face 531 is arranged toward the inner side wall close to the housing 10. The fourth end face 532 is arranged opposite to the bottom wall of the housing 10 in the second direction, and the fourth end face 532 is arranged toward the bottom wall close to the housing 10. A fourth inclined surface 530 is arranged between the bottom surface of the second end cover 53 and the side surface of the first end cover 52 facing the inner side wall of the housing 10, that is, the fourth inclined surface 530 is arranged at the junction of the third end face 531 and the fourth end face 532 of the second end cover 53.

[0071] More specifically, the inclination angle β1 of the first slope 330 relative to the second direction is in the range of [20°, 45°], the inclination angle β2 of the second slope 350 relative to the second direction is in the range of [20°, 45°], the inclination angle β3 of the third slope 520 relative to the second direction is in the range of [20°, 45°], and the inclination angle β4 of the fourth slope 530 relative to the second direction is in the range of [20°, 45°]. By limiting the range of the inclination angle β1 of the first slope 330 relative to the second direction, the range of the inclination angle β2 of the second slope 350 relative to the second direction, the range of the inclination angle β3 of the third slope 520 relative to the second direction, and the range of the inclination angle β4 of the fourth slope 530 relative to the second direction to [20°, 45°], the inclination angle β1 of the first slope 330 relative to the second direction and the inclination angle β3 of the third slope 520 relative to the second direction are prevented from being too small or too large, thereby causing interference problems such as assembly collision and abutment between the battery cell module 50 and the buffer assembly 30 during the assembly process, and the inclination angle β2 of the second slope 350 relative to the second direction and the inclination angle β4 of the fourth slope 530 relative to the second direction are prevented from being too small or too large, thereby causing interference problems such as assembly collision and abutment between the battery cell module 50 and the buffer assembly 30 during the assembly process.

[0072] More specifically, the difference between the inclination angle β1 of the first slope 330 relative to the second direction and the inclination angle β3 of the third slope 520 relative to the second direction is in the range of [0, 10°], and the difference between the inclination angle β2 of the second slope 350 relative to the second direction and the inclination angle β4 of the fourth slope 530 relative to the second direction is in the range of [0, 10°]. By limiting the range of the difference between the inclination angle β1 of the first slope 330 relative to the second direction and the inclination angle β3 of the third slope 520 relative to the second direction, as well as the range of the difference between the inclination angle β2 of the second slope 350 relative to the second direction and the inclination angle β4 of the fourth slope 530 relative to the second direction, it is possible to prevent the difference between the inclination angle β1 of the first slope 330 relative to the second direction and the inclination angle β3 of the third slope 520 relative to the second direction from being too large, resulting in poor assembly of the battery cell module 50 and the buffer assembly 30, and to prevent the difference between the inclination angle β2 of the second slope 350 relative to the second direction and the inclination angle β4 of the fourth slope 530 relative to the second direction from being too large, resulting in poor assembly of the battery cell module 50 and the buffer assembly 30.

[0073] In another embodiment, the battery module 50 further includes a fixing bar (not shown), which is sleeved outside the first end cover 52, the battery cell group 54 and the second end cover 53 to fix the first end cover 52, the battery cell group 54 and the second end cover 53. A first receiving groove (not shown) is provided on the side of the first end cover 52 away from the battery cell group 54, and a second receiving groove (not shown) is provided on the side of the second end cover 53 away from the battery cell group 54. At least part of the fixing bar is received in the first receiving groove, and at least part of the fixing bar is received in the second receiving groove. By setting a first receiving groove on the first end cover 52 and a second receiving groove on the second end cover 53, both the first receiving groove and the second receiving groove are used to accommodate at least part of the fixing strip to prevent the fixing strip from being exposed from the first end surface 521 of the first end cover 52, and to prevent the fixing strip from being exposed from the third end surface 531 of the second end cover 53, thereby avoiding interference between the fixing strip on the first end cover 52 and the first rigid component 33, and avoiding interference between the fixing strip on the second end cover 53 and the second rigid component 35.

[0074] The above are some implementation methods of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications are also considered to be within the scope of protection of the present application.

Claims

1. A battery pack, characterized in that: include: A housing having a receiving cavity; a buffer assembly, disposed in the accommodating cavity and fixed on the inner side wall of the shell, the buffer assembly being configured to be compressed or extended along a first direction; a first guide surface being disposed between a top surface of the buffer assembly and a side surface of the buffer assembly facing away from the inner side wall of the shell; and A battery cell module is assembled in the accommodating cavity; a second guide surface is arranged between the bottom surface of the battery cell module and the side surface of the battery cell module facing the inner wall of the shell, and the second guide surface is used to cooperate with the first guide surface.

2. The battery pack according to claim 1, characterized in that: The battery cell module includes a plurality of battery cells and an end cover, wherein the end cover is used to fix the plurality of battery cells, and the second guide surface is arranged between the bottom surface of the end cover and the side surface of the end cover facing the inner wall of the shell.

3. The battery pack according to claim 2, characterized in that: The buffer assembly includes a first flexible member and a first rigid member, and the first flexible member and the first rigid member are stacked along the first direction; the first flexible member is fixed on the inner wall of the shell, and the first flexible member is configured to be compressed or extended along the first direction; the first rigid member is arranged on the side of the first flexible member away from the inner wall of the shell, and a first inclined surface is arranged between the top surface of the first rigid member and the side surface of the first rigid member facing away from the inner wall of the shell.

4. The battery pack according to claim 3, characterized in that: The buffer assembly also includes a second flexible member and a second rigid member, and the second flexible member and the second rigid member are stacked along the first direction; the second flexible member is arranged in the accommodating cavity and fixed on the inner wall of the shell, and the first flexible member and the second flexible member are respectively located on two opposite sides of the inner wall of the shell along the first direction; the second flexible member is configured to be compressed or extended along the first direction; the second rigid member is arranged on the side of the second flexible member away from the inner wall of the shell, the first rigid member and the second rigid member are spaced apart along the first direction, and a second inclined surface is arranged between the top surface of the second rigid member and the side surface of the second rigid member facing away from the inner wall of the shell.

5. The battery pack according to claim 4, characterized in that: The end cover includes a first end cover and a second end cover, and the first end cover, the multiple battery cells and the second end cover are sequentially connected and arranged along the first direction; the multiple battery cells are clamped between the first end cover and the second end cover along the first direction; a third inclined surface is arranged between the bottom surface of the first end cover and the side surface of the first end cover facing away from the multiple battery cells, and a fourth inclined surface is arranged between the bottom surface of the second end cover and the side surface of the second end cover facing away from the multiple battery cells; the third inclined surface is used to contact with the first inclined surface, and the fourth inclined surface is used to contact with the second inclined surface.

6. The battery pack according to claim 5, characterized in that: The battery cell module also includes a fixing bar, which is sleeved on the first end cover, the multiple battery cells and the second end cover to fix the first end cover, the multiple battery cells and the second end cover in connection; a first receiving groove is provided on a side of the first end cover away from the multiple battery cells, and a second receiving groove is provided on a side of the second end cover away from the multiple battery cells, at least part of the fixing bar is accommodated in the first receiving groove, and at least part of the fixing bar is accommodated in the second receiving groove.

7. The battery pack according to claim 1, characterized in that: When the buffer component is in an extended state, the difference between the width of the accommodating cavity in the first direction and the width of the buffer component in the first direction is smaller than the width of the battery cell module in the first direction; when the buffer component is in a compressed state, the difference between the width of the accommodating cavity in the first direction and the width of the buffer component in the first direction is equal to the width of the battery cell module in the first direction.

8. The battery pack according to claim 1, wherein: The inclination angle of the first guide surface relative to the second direction is in the range of [20°, 45°], and the inclination angle of the second guide surface relative to the second direction is in the range of [20°, 45°], and the second direction is different from the first direction.

9. The battery pack according to claim 8, characterized in that: The difference between an inclination angle of the first guide surface relative to the second direction and an inclination angle of the second guide surface relative to the second direction is in a range of [0, 10°].

10. The battery pack according to claim 1, wherein: A guide bar is provided on the side of the buffer component away from the inner wall of the shell, and a guide groove is provided on the outer wall of the battery cell module; or a guide groove is provided on the side of the buffer component away from the inner wall of the shell, and a guide bar is provided on the outer wall of the battery cell module; the guide bar cooperates with the guide groove.

11. An electrical device, characterized in that: include: The battery pack according to any one of claims 1 to 10; as well as A load device, the battery pack is electrically connected to the load device.

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