CN218242117U - Power battery - Google Patents

Abstract

The utility model provides a power battery, this power battery includes: the lower box body comprises a bottom plate and a coaming which is arranged at the outer edge of the bottom plate in a surrounding manner, and the bottom plate and the coaming jointly form a mounting cavity; the battery cell group is arranged in the installation cavity and comprises a plurality of battery cell units which are sequentially arranged, the coaming comprises a fixed plate fixedly connected with the bottom plate and a detachable plate detachably connected with the bottom plate, and the detachable plate is positioned at one end of the battery cell group; the fixing frame is located above the lower box body and is detachably connected with the surrounding plate, and the fixing frame is in limit fit with the upper end of the electric core group. Through the technical scheme that this application provided, can solve the problem that the power battery among the correlation technique can't be disassembled the maintenance.

Description

Power battery

Technical Field

The utility model relates to a new energy battery technical field particularly, relates to a power battery.

Background

Under the requirement of sustainable energy development, with the increasing development of new energy automobile technology, the power battery as a green energy can greatly reduce the emission of automobile exhaust, plays a very important role in environmental protection, and is more and more concerned by people.

In the related art, in order To improve the energy density of the power battery, the power battery usually adopts a CTP (Cell To Pack) structure, and a step of forming a module by a battery Cell is eliminated, so that a connecting structural member in the process of forming the module is removed, thereby improving the energy density of the power battery.

However, the power battery in the related art adopts an assembly process of welding or gluing, so that the power battery cannot be disassembled for maintenance after being assembled, or the power battery is damaged during violent disassembly.

SUMMERY OF THE UTILITY MODEL

The utility model provides a power battery to the problem of maintenance can't be disassembled to power battery among the solution correlation technique.

The utility model provides a power battery, power battery includes: the lower box body comprises a bottom plate and a coaming plate arranged around the outer edge of the bottom plate, and the bottom plate and the coaming plate jointly enclose a mounting cavity; the battery cell group is arranged in the installation cavity and comprises a plurality of battery cell units which are sequentially arranged, the coaming comprises a fixed plate fixedly connected with the bottom plate and a detachable plate detachably connected with the bottom plate, and the detachable plate is positioned at one end of the battery cell group; the fixing frame is positioned above the lower box body and is detachably connected with the surrounding plate, and the fixing frame is in limit fit with the upper end of the electric core group.

Furthermore, the lower box body further comprises a separation plate, the lower end of the separation plate is connected with the upper surface of the bottom plate, the extending direction of the separation plate is the same as that of the electric core group, the separation plate separates the installation cavity into at least two installation sub-cavities, and each installation sub-cavity is provided with one electric core group.

Further, power battery includes a plurality of mounts, and the extending direction of mount is mutually perpendicular with the extending direction of electric core group, is provided with a mount between two adjacent electric core units, and the lower surface of one side of mount is taken and is established at the upper surface of one of them of two adjacent electric core units, and the lower surface of the opposite side of mount is taken and is established at the upper surface of another of two adjacent electric core units.

Further, the extending direction of mount is the same with the extending direction of electric core group, and the mount includes: the first fixing frame is positioned on one side of the lower box body, the lower surface of one side of the first fixing frame is erected on the upper surface of the electric core group, and the lower surface of the other side of the first fixing frame is detachably connected with the enclosing plate; the second fixing frame is positioned between the two adjacent electric core groups, the lower surface of one side of the second fixing frame is arranged on the upper surface of one of the two adjacent electric core groups in an overlapping mode, and the lower surface of the other side of the second fixing frame is arranged on the upper surface of the other one of the two adjacent electric core groups in an overlapping mode.

Furthermore, the fixing frame is provided with a concave section, the concave section is positioned on one side of the electric core group and detachably connected with the upper end of the separation plate, or the concave section is detachably connected with the upper end of the enclosing plate.

Further, the lower surface of mount is provided with the partition muscle, separates in the interval that the muscle stretched into two adjacent electric core units of same electric core group, the both sides of separating the muscle respectively with the lateral wall looks butt of two adjacent electric core units.

Furthermore, the power battery also comprises a top elastic pad which is clamped between the lower surface of the fixing frame and the upper surface of the electric core group.

Further, the power battery also comprises a lateral elastic pad, and the lateral elastic pad is clamped between the lateral wall of the electric core group and the surrounding plate, or the lateral elastic pad is clamped between the lateral wall of the electric core group and the partition plate.

Further, power battery still includes the bottom cushion of setting in the installation intracavity, and the lower surface of bottom cushion is laminated with the upper surface of bottom plate mutually, and the upper surface of bottom cushion is laminated with the lower surface of electric core group mutually.

Furthermore, the upper surface of the bottom elastic cushion is provided with a limiting groove, and the lower end of the battery cell unit is clamped in the limiting groove.

Furthermore, the detachable plate is respectively connected with the enclosing plate and the partition plate through first screws; the fixed frame is respectively connected with the coaming and the partition plate through second screws; the partition plate extends along the length direction of the lower box body; the coaming comprises three fixed plates and a detachable plate, wherein two fixed plates of the three fixed plates are respectively positioned at two sides of the lower box body in the width direction, the other fixed plate of the three fixed plates is positioned at one end of the electric core group, and the detachable plate is positioned at the other end of the electric core group; two adjacent battery cell units of the same battery cell group are connected in a bonding way; the power battery also comprises a Busbar and an FPC, wherein the Busbar is positioned between the electric core group and the fixing frame, the FPC is positioned above the fixing frame, the Busbar is connected with an electrode post of the electric core unit through a fastening piece, and the Busbar is connected with a connecting sheet of the FPC; the power battery is a square-shell battery.

Use the technical scheme of the utility model, power battery includes box, electric core group and mount down, forms electric core group through arranging a plurality of electric core units in proper order, sets up electric core group again in the installation cavity that bottom plate and bounding wall were established, because the spacing cooperation in mount and the upper end of electric core group, the mount is connected with the bounding wall, prevents that electric core group from deviating from the installation cavity to accomplish power battery's equipment. And, because the bounding wall includes the removable board of being connected with the bottom plate can be dismantled, the mount can be dismantled with the bounding wall and be connected, when power battery is disassembled to needs, through dismantling mount and removable board, because removable board is located the one end of electric core group for electric core group can be disassembled from power battery intact, thereby realize dismantling of power battery, avoid power battery impaired in violence is disassembled, guarantee the echelon utilization after power battery disassembles.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows an exploded view of a power battery according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram illustrating a fixing frame of a power battery according to an embodiment of the present invention;

fig. 3 shows a schematic structural diagram of a power battery provided according to an embodiment of the present invention, wherein the lower box is not mounted;

fig. 4 shows a partial enlarged view of a power battery according to an embodiment of the present invention;

fig. 5 shows a further enlarged partial view of a power cell according to an embodiment of the present invention;

fig. 6 shows an explosion diagram of a power battery according to a second embodiment of the present invention;

fig. 7 is a schematic structural diagram illustrating a first fixing frame of a power battery according to a second embodiment of the present invention;

fig. 8 is a schematic structural diagram illustrating a second fixing frame of a power battery according to a second embodiment of the present invention;

fig. 9 shows a schematic structural diagram of a power battery provided according to a second embodiment of the present invention.

Wherein the figures include the following reference numerals:

10. a lower box body; 11. a base plate; 12. enclosing plates; 121. a fixing plate; 122. a removable panel; 13. a mounting cavity; 131. a mounting sub-cavity; 14. a partition plate;

20. the electric core group; 21. a cell unit; 211. a pole column;

30. a fixed mount; 31. a first fixing frame; 32. a second fixing frame; 33. a concave section; 331. a vertical section; 332. a horizontal segment; 333. a first undercut section; 334. a second concave section; 34. separating ribs;

41. a top resilient pad; 42. a lateral elastic pad; 421. a first side elastic pad; 422. a second side elastic pad; 43. a bottom resilient pad;

51. a first screw; 52. a second screw; 53. a fastener;

61. busbar; 62. FPC; 621. and (7) connecting the sheet.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

As shown in fig. 1 to 5, the embodiment of the present invention provides a power battery, this power battery includes lower box 10, electric core group 20 and mount 30, lower box 10 includes bottom plate 11 and encloses the bounding wall 12 who establishes at the outside border of bottom plate 11, bottom plate 11 and bounding wall 12 enclose into installation cavity 13 jointly, electric core group 20 sets up in installation cavity 13, electric core group 20 includes a plurality of electric core units 21 of arranging in proper order, bounding wall 12 includes fixed plate 121 with bottom plate 11 fixed connection and can dismantle the removable board 122 of being connected with bottom plate 11, removable board 122 is located electric core group 20's one end, mount 30 is located lower box 10's top and can dismantle with bounding wall 12 and be connected, mount 30 is with electric core group 20's upper end spacing cooperation.

The power battery who uses this embodiment to provide, power battery includes box 10 down, electric core group 20 and mount 30, through arranging a plurality of electric core unit 21 in proper order and form electric core group 20, set up electric core group 20 again in bottom plate 11 and bounding wall 12 enclose the installation cavity 13 of establishing, because mount 30 and electric core group 20's the spacing cooperation in upper end, mount 30 is connected with bounding wall 12, prevent that electric core group 20 from deviating from installation cavity 13, thereby accomplish power battery's equipment. And, because bounding wall 12 includes removable board 122 of dismantling the connection with bottom plate 11, mount 30 can dismantle the connection with bounding wall 12, when needs disassemble power battery, through dismantling mount 30 and removable board 122, because removable board 122 is located the one end of cell assembly 20 for cell assembly 20 can be disassembled from power battery intact, thereby realize power battery's dismantling, avoid power battery impaired in violence is disassembled, guarantee the echelon utilization after power battery disassembles.

Wherein, removable board 122 can be one, and removable board 122 also can be two, when removable board 122 is two, two removable boards 122 set up the both ends at electric core group 20 respectively.

It should be noted that, the step utilization after the power battery is disassembled means that the power battery is composed of a plurality of electric core groups 20, when one of the electric core groups 20 is damaged, because the power battery provided by the embodiment can be disassembled, and each electric core group 20 can be completely disassembled from the power battery, thereby the electric core groups 20 except the damaged electric core group 20 can be reused.

As shown in fig. 1, the lower box 10 further includes a separation plate 14, a lower end of the separation plate 14 is connected to an upper surface of the bottom plate 11, an extending direction of the separation plate 14 is the same as an extending direction of the electric core assembly 20, the separation plate 14 divides the installation cavity 13 into at least two installation sub-cavities 131, and each installation sub-cavity 131 is provided with one electric core assembly 20. Through all setting up an electric core group 20 in every installation sub-chamber 131 for in the installation, install the direction through division board 14 to electric core group 20, improve the installation effectiveness, and through division board 14 to electric core group 20's limiting displacement, avoid rocking or electric core unit's use inflation leads to electric core group 20's position change, guarantee electric core group 20's position installation reliable and stable.

As shown in fig. 1, the power battery includes a plurality of fixing frames 30, an extending direction of the fixing frame 30 is perpendicular to an extending direction of the battery core pack 20, one fixing frame 30 is disposed between two adjacent battery cell units 21, a lower surface of one side of the fixing frame 30 is set on an upper surface of one of the two adjacent battery cell units 21, and a lower surface of the other side of the fixing frame 30 is set on an upper surface of the other of the two adjacent battery cell units 21. Through setting up a mount 30 at two adjacent electric core units 21, the upper surface at two adjacent electric core units 21 is set up respectively to the lower surface of mount 30 both sides to make same mount 30 and two spacing cooperations of electric core unit 21, reduce the quantity of mount 30 under the reliable prerequisite of assurance installation, improve power battery's energy density, avoid electric core group 20 to deviate from the installation cavity 131.

As shown in fig. 2, 4 and 5, the fixing frame 30 has a concave section 33, the concave section 33 is located at one side of the electric core assembly 20, and the concave section 33 is detachably connected to the upper end of the separation plate 14, or the concave section 33 is detachably connected to the upper end of the apron 12. The concave section 33 is arranged on the fixing frame 30, the concave section 33 is utilized to realize the detachable connection of the fixing frame 30, and in the using process of the power battery, the height difference between the concave section 33 and the rest part of the fixing frame 30 is utilized, and the expansion allowance of the electric core unit 21 in the direction vertical to the bottom plate 11 is reserved by the height difference, so that the reliable connection of the fixing frame 30 and the lower box body 10 is ensured.

As shown in fig. 2, the concave section 33 is composed of a vertical section 331 and a horizontal section 332, the lower end of the vertical section 331 is connected to one end of the horizontal section 332, the upper end of the vertical section 331 is connected to the fixing frame 30, wherein the concave section 33 includes a first concave section 333 and a second concave section 334, the first concave section 333 is composed of a horizontal section 332 and a vertical section 331 disposed at the upper end of the horizontal section 332 near the fixing frame, the second concave section 334 is composed of a horizontal section 332 and two vertical sections 331 disposed at the two ends of the horizontal section 332, the horizontal section of the first concave section 333 is detachably connected to the upper end of the enclosing plate 12, and the horizontal section of the second concave section 334 is detachably connected to the upper end of the dividing plate 14.

As shown in fig. 2, the extending direction of the concave section 33 is perpendicular to the extending direction of the fixing frame 30, the first concave sections 333 are disposed at two ends of the fixing frame 30, the second concave sections 334 are disposed at intervals along the extending direction of the fixing frame 30, and one second concave section 334 is disposed at a position of the fixing frame 30 corresponding to each partition plate 14.

As shown in fig. 2, the lower surface of the fixing frame 30 is provided with a separating rib 34, the separating rib 34 extends into the space between two adjacent battery cell units 21 of the same battery cell group 20, and two sides of the separating rib 34 respectively abut against the side walls of two adjacent battery cell units 21. Through the lower surface at mount 30 setting separation muscle 34, separate the both sides of muscle 34 respectively with two adjacent electric core unit 21's lateral wall looks butt, in power battery's use, through separating the limiting displacement of muscle 34 to electric core unit 21, avoid electric core unit 21's inflation phenomenon to lead to electric core unit 21's relative position to change, thereby guarantee electric core group 20's mounted position reliable and stable.

As shown in fig. 2, the horizontal extending direction of the partition rib 34 is the same as the extending direction of the fixing frame 30, the partition rib 34 is disposed in the middle of the fixing frame 30, and a partition rib 34 extends into the space between every two adjacent battery cells 21 of the same battery cell group 20.

As shown in fig. 1, the power battery further includes a top elastic pad 41, and the top elastic pad 41 is sandwiched between the lower surface of the fixing frame 30 and the upper surface of the electric core pack 20. Through set up top cushion 41 between mount 30 and electric core group 20, when the electric core group 20 takes place the inflation phenomenon, the upper surface extrusion top cushion 41 of electric core group 20, top cushion 41 takes place compression deformation, when electric core group 20 takes place the phenomenon of contracting, receive the elastic recovery effect of top cushion 41, make the upper surface of electric core group 20 remain the lower surface laminating through top cushion 41 and mount 30 throughout, thereby guarantee in power battery's working process, no matter electric core group 20 takes place the inflation phenomenon, mount 30 all can play limiting displacement to electric core group 20, avoid electric core group 20 to deviate from installation sub-cavity 131, guarantee electric core group 20's mounted position reliable and stable.

As shown in fig. 1 and 3, the power battery further includes a lateral elastic pad 42, where the lateral elastic pad 42 is sandwiched between the lateral wall of the electric core assembly 20 and the surrounding plate 12, or the lateral elastic pad 42 is sandwiched between the lateral wall of the electric core assembly 20 and the separating plate 14. Through setting up lateral part cushion 42, when the cell group 20 takes place the inflation phenomenon, the lateral wall extrusion lateral part cushion 42 of cell group 20, lateral part cushion 42 takes place compression deformation, when the cell group 20 takes place to contract the phenomenon, receive lateral part cushion 42's elastic recovery effect, make the lateral wall of cell group 20 remain throughout to laminate through lateral part cushion 42 and division board 14 or bounding wall 12, thereby guarantee in power battery's the course of work, no matter whether the cell group 20 takes place the inflation phenomenon, division board 14 and bounding wall 12 all can play limiting displacement to cell group 20, avoid the relative position of cell group 20 to change, guarantee the mounted position reliable and stable of cell group 20.

The utility model discloses an in the embodiment, top cushion 41 and lateral part cushion 42 all adopt thermal-insulated elastic material to make, for example the bubble is cotton, when absorbing installation tolerance and inflation volume, play the effect of keeping apart the thermal unbalance, when the temperature of certain electric core group 20 is too high, avoid influencing the normal work of other electric core group 20.

As shown in fig. 1 and 3, the side elastic pad 42 includes a first side elastic pad 421 and a plurality of second side elastic pads 422, the first side elastic pad 421 extends from one end of the electric core set 20 to the other end of the electric core set 20, the extending direction of the second side elastic pads 422 is perpendicular to the extending direction of the first side elastic pads 421, and one second side elastic pad 422 is disposed on the end surface of each electric core set 20.

As shown in fig. 1, the power battery further includes a bottom elastic pad 43 disposed in the installation cavity 13, a lower surface of the bottom elastic pad 43 is attached to an upper surface of the bottom plate 11, and an upper surface of the bottom elastic pad 43 is attached to a lower surface of the electric core assembly 20. Utilize the elasticity idiosyncrasy of bottom cushion 43, make bottom cushion 43 absorb power battery's installation tolerance and the inflation of electric core group 20 warp, and, because bottom cushion 43 adopts the heat conduction material, thereby realize that electric core group 20 carries out heat-conduction to bottom plate 11 through bottom cushion 43, thereby guarantee power battery's radiating effect, at power battery during operation, the heat of avoiding electric core group 20 to produce can't outwards conduct, avoid causing power battery's thermal unbalance, guarantee power battery's safe in utilization and life.

In this embodiment, the upper surface of the bottom elastic pad 43 is provided with a limiting groove, and the lower end of the battery cell unit 21 is clamped in the limiting groove. Establish at the spacing inslot through the lower extreme card with electric core unit 21 for electric core unit 21 receives the limiting displacement of spacing groove, avoids electric core unit 21's inflation phenomenon to lead to electric core unit 21's relative position to change, thereby guarantees that electric core group 20's mounted position is reliable and stable.

The bottom elastic pad 43 may be made of a heat conductive elastic material such as heat conductive silicone.

As shown in fig. 1, the detachable plate 122 is connected to the enclosing plate 12 and the dividing plate 14 by first screws 51, respectively. By adopting the first screw 51, the mounting speed and the dismounting speed of the detachable plate 122 are improved, the pretightening force along the extending direction of the electric core group 20 is provided for the electric core group 20 through the first screw 51, and the assembly strength is ensured to meet the requirement.

As shown in fig. 2, 4 and 5, the fixing bracket 30 is connected to the surrounding plate 12 and the partition plate 14 by second screws 52. By adopting the second screw 52, the mounting speed and the dismounting speed of the fixing frame 30 are improved, and the second screw 52 provides pre-tightening force in the direction perpendicular to the bottom plate for the electric core group 20, so that the assembly strength is ensured to meet the requirement.

In this embodiment, the fixing frame 30 is connected to the enclosing plate 12 and the partition plate 14 by the second screws 52.

As shown in fig. 1, the partition plate 14 extends in the longitudinal direction of the lower case 10.

As shown in fig. 1, the enclosing plate 12 comprises three fixing plates 121 and a detachable plate 122, two fixing plates 121 of the three fixing plates 121 are respectively located at two sides of the lower case 10 in the width direction, another fixing plate 121 of the three fixing plates 121 is located at one end of the electric core assembly 20, and a detachable plate 122 is located at the other end of the electric core assembly 20. During the assembling and disassembling process of the power battery, the detachable plate 122 is assembled and disassembled, so that the lower case 10 is assembled and disassembled.

Wherein the detachable plate 122 is located at the rear end of the lower case 10.

In the present embodiment, two adjacent cell units 21 of the same cell group 20 are adhesively connected. Because two adjacent battery cell units 21 adopt bonding connection, the connection reliability of the battery cell units 21 is high, the connection structure of the battery cell group 20 is simplified, and the energy density of the battery cell group 20 is improved, so that the energy density of the power battery is improved.

In the present embodiment, two adjacent cell units 21 of the same cell group 20 are stacked into a group by using an adhesive-backed frame.

As shown in fig. 1, the power battery further comprises a Busbar61 and an FPC62, the Busbar61 is located between the battery cell group 20 and the fixing frame 30, the FPC62 is located above the fixing frame 30, the Busbar61 is connected with the pole 211 of the battery cell unit 21 through the fastener 53, and the Busbar61 is connected with the connecting piece 621 of the FPC 62. Connect the utmost point post of buss bar61 and electric core unit 21 through fastener 53, connect buss bar61 and FPC62 through connection piece 621 to the signal acquisition of each electric core unit 21 of realization to power battery guarantees each electric core unit 21 of real-time supervision, guarantees power battery's safety in utilization.

In other embodiments of the present invention, the FPC62 may be replaced with an FFC.

Wherein, busbar is the Busbar, and FPC is Flexible Printed Circuit board (Flexible Printed Circuit), and FFC is Flexible Flat Cable (Flexible Flat Cable).

In the present embodiment, the power battery is a square-casing battery.

As shown in fig. 6 to fig. 9, the second embodiment of the present invention provides a power battery, and the power battery has the following differences:

as shown in fig. 6, the extending direction of the fixing frame 30 is the same as the extending direction of the electric core groups 20, the fixing frame 30 includes a first fixing frame 31 and a second fixing frame 32, the first fixing frame 31 is located at one side of the lower box 10, the lower surface of one side of the first fixing frame 31 is erected on the upper surface of the electric core group 20, the lower surface of the other side of the first fixing frame 31 is detachably connected with the surrounding plate 12, the second fixing frame 32 is located between two adjacent electric core groups 20, the lower surface of one side of the second fixing frame 32 is erected on the upper surface of one of the two adjacent electric core groups 20, and the lower surface of the other side of the second fixing frame 32 is erected on the upper surface of the other of the two adjacent electric core groups 20. Through setting up a second mount 32 at two adjacent electric core groups 20, the upper surface at two adjacent electric core groups 20 is set up respectively to the lower surface of second mount 32 both sides to make same second mount 32 and two electric core groups 20 spacing cooperation, avoid electric core group 20 to deviate from the installation sub-cavity 131, reduce the quantity of second mount 32 under the reliable prerequisite of assurance installation, improve power battery's energy density. Moreover, the first fixing frames 31 are arranged on the two sides of the lower box body 10, and the lower surface of one side of the first fixing frame 31 is arranged on the upper surface of the electric core group 20, so that the electric core group 20 is further prevented from being separated from the installation sub-cavity 131.

As shown in fig. 7 and 8, the concave section 33 extends along the extending direction of the fixing frame 30, the first concave section 333 is disposed at the middle of the first fixing frame 31, and the second concave section 334 is disposed at the middle of the second fixing frame 32.

As shown in fig. 7 and 8, the horizontal extending direction of the separating ribs 34 is perpendicular to the extending direction of the fixing frame 30, the separating ribs 34 are arranged at intervals along the extending direction of the fixing frame 30, and two separating ribs 34 extend into the interval between every two adjacent battery cell units 21 of the same battery cell group 20.

As shown in fig. 7 and 8, the first fixing frame 31 is connected to the enclosure plate 12 by second screws 52, and the second fixing frame 32 is connected to the enclosure plate 12 and the partition plate 14 by the second screws 52.

The power battery provided by the embodiment has the following beneficial effects:

(1) By sequentially disassembling the fixed frame 30 and the detachable plate 122, the detachable plate 122 is positioned at one end of the electric core group 20, so that the electric core group 20 can be disassembled from the power battery in a good condition, the power battery is convenient to assemble, disassemble and maintain, the power battery is prevented from being damaged in violent disassembly, and the echelon utilization of the power battery after disassembly is ensured;

(2) The fixing frame 30 is in limit fit with the upper end of the electric core group 20, and the fixing frame 30 is connected with the coaming 12, so that the electric core group 20 is prevented from being separated from the mounting cavity 13, the power battery assembly efficiency is higher, and the consistency is good;

(3) The top elastic pad 41, the side elastic pad 42 and the bottom elastic pad 43 are arranged on the periphery of the electric core group 20, so that the expansion amount of the electric core group 20 in the using process and the assembly tolerance in the assembly process are absorbed, and the assembly accuracy and reliability of the power battery are ensured;

(4) The detachable plate 122 of the lower box 10 is locked and fixed by the first screw 51, and after the electric core assembly 20 enters the installation sub-cavity 131, the first screw 51 can provide pre-tightening force along the extending direction of the electric core assembly 20 for the electric core assembly 20, so as to ensure that the assembling strength meets the requirements.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

Unless specifically stated otherwise, the relative arrangement of parts and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the directional terms such as "front, back, upper, lower, left, right", "horizontal, vertical, horizontal" and "top, bottom", etc. are usually based on the directions or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, and in the case of not making a contrary explanation, these directional terms do not indicate and imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore, should not be construed as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

For ease of description, spatially relative terms such as "over 8230 \ 8230;,"' over 8230;, \8230; upper surface "," above ", etc. may be used herein to describe the spatial relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary terms "at 8230; \8230; 'above" may include both orientations "at 8230; \8230;' above 8230; 'at 8230;' below 8230;" above ". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms do not have special meanings unless otherwise stated, and therefore, the scope of the present invention should not be construed as being limited.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. A power cell, characterized in that the power cell comprises:

the lower box body (10) comprises a bottom plate (11) and a surrounding plate (12) arranged at the outer edge of the bottom plate (11) in a surrounding mode, and the bottom plate (11) and the surrounding plate (12) jointly form a mounting cavity (13) in a surrounding mode;

the battery pack (20) is arranged in the installation cavity (13), the battery pack (20) comprises a plurality of battery cell units (21) which are sequentially arranged, the coaming (12) comprises a fixing plate (121) fixedly connected with the bottom plate (11) and a detachable plate (122) detachably connected with the bottom plate (11), and the detachable plate (122) is positioned at one end of the battery cell pack (20);

the fixing frame (30) is located above the lower box body (10) and detachably connected with the enclosing plate (12), and the fixing frame (30) is in limit fit with the upper end of the electric core group (20).

2. The power battery according to claim 1, wherein the lower box body (10) further comprises a separation plate (14), the lower end of the separation plate (14) is connected with the upper surface of the bottom plate (11), the extension direction of the separation plate (14) is the same as the extension direction of the electric core group (20), the separation plate (14) divides the installation cavity (13) into at least two installation sub-cavities (131), and each installation sub-cavity (131) is provided with one electric core group (20).

3. The power battery according to claim 2, characterized in that the power battery comprises a plurality of the fixing frames (30), the extending direction of the fixing frames (30) is perpendicular to the extending direction of the cell group (20), one fixing frame (30) is arranged between two adjacent cell units (21), the lower surface of one side of each fixing frame (30) is overlapped on the upper surface of one of the two adjacent cell units (21), and the lower surface of the other side of each fixing frame (30) is overlapped on the upper surface of the other of the two adjacent cell units (21).

4. The power battery according to claim 2, characterized in that the extension direction of the fixing frame (30) is the same as the extension direction of the electric core group (20), and the fixing frame (30) comprises:

the first fixing frame (31) is positioned on one side of the lower box body (10), the lower surface of one side of the first fixing frame (31) is erected on the upper surface of the electric core group (20), and the lower surface of the other side of the first fixing frame (31) is detachably connected with the enclosing plate (12);

the second fixing frame (32) is positioned between the two adjacent electric core groups (20), the lower surface of one side of the second fixing frame (32) is arranged on the upper surface of one of the two adjacent electric core groups (20), and the lower surface of the other side of the second fixing frame (32) is arranged on the upper surface of the other one of the two adjacent electric core groups (20).

5. The power battery according to claim 3 or 4, characterized in that the fixing frame (30) is provided with a concave section (33), the concave section (33) is positioned at one side of the electric core group (20), the concave section (33) is detachably connected with the upper end of the separation plate (14), or the concave section (33) is detachably connected with the upper end of the coaming (12).

6. The power battery according to claim 3 or 4, characterized in that a separation rib (34) is arranged on the lower surface of the fixing frame (30), the separation rib (34) extends into the space between two adjacent cell units (21) of the same cell group (20), and two sides of the separation rib (34) are respectively abutted against the side walls of two adjacent cell units (21).

7. The power battery according to claim 3 or 4, characterized in that the power battery further comprises a top elastic pad (41), and the top elastic pad (41) is clamped between the lower surface of the fixing frame (30) and the upper surface of the electric core group (20).

8. The power battery according to any one of claims 2-4, characterized in that the power battery further comprises a side elastic pad (42), wherein the side elastic pad (42) is sandwiched between the side wall of the electric core group (20) and the coaming (12), or the side elastic pad (42) is sandwiched between the side wall of the electric core group (20) and the separation plate (14).

9. The power battery according to any one of claims 1 to 4, characterized in that the power battery further comprises a bottom elastic pad (43) arranged in the installation cavity (13), wherein the lower surface of the bottom elastic pad (43) is attached to the upper surface of the bottom plate (11), and the upper surface of the bottom elastic pad (43) is attached to the lower surface of the electric core assembly (20).

10. The power battery as claimed in claim 9, wherein the upper surface of the bottom elastic pad (43) is provided with a limiting groove, and the lower end of the cell unit (21) is clamped in the limiting groove.

11. The power cell according to any one of claims 2 to 4,

the detachable plate (122) is respectively connected with the enclosing plate (12) and the partition plate (14) through first screws (51);

the fixed frame (30) is respectively connected with the coaming (12) and the partition plate (14) through second screws (52);

the partition plate (14) extends along the length direction of the lower box body (10);

the coaming (12) comprises three fixing plates (121) and one detachable plate (122), two fixing plates (121) of the three fixing plates (121) are respectively positioned at two sides of the lower box body (10) in the width direction, the other fixing plate (121) of the three fixing plates (121) is positioned at one end of the electric core group (20), and the one detachable plate (122) is positioned at the other end of the electric core group (20);

two adjacent battery cell units (21) of the same battery cell group (20) are connected in a bonding way;

the power battery further comprises a Busbar (61) and an FPC (62), wherein the Busbar (61) is positioned between the battery cell group (20) and the fixing frame (30), the FPC (62) is positioned above the fixing frame (30), the Busbar (61) is connected with a pole (211) of the battery cell unit (21) through a fastener (53), and the Busbar (61) is connected with a connecting piece (621) of the FPC (62);

the power battery is a square-shell battery.

Images