Battery pack and electric equipment

Abstract

The utility model provides a battery pack and electric equipment, and relates to the technical field of batteries. The battery pack comprises a shell, at least one elastic piece and a plurality of solid-state battery cell units, the shell is provided with at least one mounting groove, the plurality of solid-state battery cell units are sequentially arranged in the mounting groove, the elastic piece is correspondingly inserted between the solid-state battery cell units and the inner wall of the mounting groove, and / or the elastic piece is correspondingly inserted between two adjacent solid-state battery cell units, and the mounting groove is formed in the shell. And the solid-state battery cell units are limited in the mounting grooves. According to the battery pack provided by the invention, the solid-state battery cell units are constrained through the elastic parts, and the assembly mode of the elastic parts is relatively convenient, so that the assembly efficiency of the battery pack is improved.

Description

Technical Field

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

[0002] A solid-state battery is a battery that uses solid electrodes and solid electrolytes. A solid-state battery includes multiple stacked cells. In order to ensure stable contact between two adjacent cells and thus ensure the charge and discharge performance of the solid-state battery, constraints need to be imposed on the expansion direction of the solid-state battery.

[0003] In the related art, the solid-state battery also includes an outer container, which has a mounting cavity, and one side of the mounting cavity has an opening. When installing the solid-state battery, firstly, a pulling force is applied to two opposite sides of the outer container toward the side away from the mounting cavity to open the outer container, and then a plurality of battery cells are placed in the mounting cavity through the opening, and finally, the outer container is released.

[0004] However, the assembly scheme of the above-mentioned solid-state battery is relatively complicated and the assembly efficiency is low. Utility Model Content

[0005] The present application provides a battery pack and electrical equipment to solve the problem of relatively complex assembly scheme and low assembly efficiency of solid-state batteries in the prior art.

[0006] In a first aspect, the present application provides a battery pack, comprising a housing, at least one elastic member, and a plurality of solid-state battery cells;

[0007] The housing is provided with at least one mounting groove, and a plurality of the solid-state battery core units are sequentially arranged in the mounting groove;

[0008] The elastic member is correspondingly inserted between the solid-state battery cell unit and the inner wall of the installation groove, and / or the elastic member is correspondingly inserted between two adjacent solid-state battery cell units to confine each solid-state battery cell unit within the installation groove.

[0009] In some technical solutions of the above-mentioned battery pack, the elastic member includes a mounting plate and at least one spring sheet arranged on the mounting plate, and the spring sheet faces the solid-state battery cell unit or the inner wall of the mounting groove.

[0010] In some technical solutions of the above-mentioned battery pack, the mounting plate has a first side and a second side arranged opposite to each other, one end of the spring sheet is arranged on the mounting plate, the other end of the spring sheet faces the first side, and the second side faces the bottom of the mounting groove.

[0011] In some technical solutions of the above-mentioned battery pack, the number of the spring sheets is at least two, and the spring sheets are parallel to each other.

[0012] In some technical solutions of the above-mentioned battery pack, the mounting plate is provided with at least one avoidance hole, the spring sheet corresponds to the avoidance hole, and the spring sheet is compressed by the solid-state battery cell unit to move toward the avoidance hole.

[0013] In some technical solutions of the above-mentioned battery pack, the projection of the spring on the mounting plate is located within the avoidance hole.

[0014] In some technical solutions of the above-mentioned battery pack, the spring sheet is a stamped sheet formed by stamping on the mounting plate.

[0015] In some technical solutions of the above-mentioned battery pack, each of the spring sheets is located on the same surface of the mounting plate.

[0016] In some technical solutions of the above-mentioned battery pack, there are multiple spring sheets, and each of the spring sheets is arranged in a rectangular array.

[0017] In some technical solutions of the above battery pack, a smooth portion is provided on at least one of a side of the mounting plate facing away from the elastic sheet and a side of the elastic sheet facing away from the mounting plate.

[0018] In some technical solutions of the above-mentioned battery pack, the smooth portion is a smooth layer covering at least one of a side of the mounting plate facing away from the elastic sheet and a side of the elastic sheet facing away from the mounting plate.

[0019] In some technical solutions of the above-mentioned battery pack, at least one protective plate is further included, and the protective plate is located in the installation groove, and the protective plate is located between the elastic member and the solid-state battery cell unit adjacent to the protective plate.

[0020] In some technical solutions of the above-mentioned battery pack, one of the guard plate and the elastic member has at least one slide groove, and the other has at least one slider, and the slider is correspondingly inserted into the slide groove.

[0021] In a second aspect, the present application provides an electrical device, including a device body, on which is disposed at least one of the above-mentioned battery packs.

[0022] The present application proposes a battery pack and electrical equipment, the battery pack includes a shell, at least one elastic member and a plurality of solid-state battery cell units, the shell has at least one mounting groove, and the plurality of solid-state battery cell units are sequentially arranged in the mounting groove. When assembling the battery pack, first place each solid-state battery cell unit in the mounting groove in turn, and then insert the elastic member between the solid-state battery cell unit and the inner wall of the mounting groove, or insert the elastic member between two adjacent solid-state battery cell units, so that the elastic member abuts against the solid-state battery cell unit, and the solid-state battery cell unit will exert a force on the elastic member, thereby compressing the elastic member, and the elastic member can exert an elastic force on the solid-state battery cell unit, thereby confining each solid-state battery cell unit in the mounting groove. At the same time, when the solid-state battery cell unit expands or contracts, the elastic force of the elastic member can provide constraints for the solid-state battery cell unit, so that the solid-state battery cell unit is always within the working pressure range, ensuring the cycle life and charge and discharge performance of the battery pack. When assembling the elastic member, the elastic member can be inserted into the installation groove by directly applying pressure to the elastic member. The assembly method is relatively simple and convenient, thereby making the assembly method of the battery pack more convenient, reducing the assembly time of the battery pack and improving the assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0024] Figure 1 A schematic diagram of the structure of a battery pack provided in an embodiment of the present application;

[0025] Figure 2 An exploded schematic diagram of a battery pack provided in an embodiment of the present application;

[0026] Figure 3 A schematic diagram of a state when an elastic member is inserted into a battery pack provided in an embodiment of the present application;

[0027] Figure 4 for Figure 2 A schematic diagram of the structure of the elastic member;

[0028] Figure 5 for Figure 4 A schematic diagram of the structure from another perspective;

[0029] Figure 6 for Figure 2 Schematic diagram of the structure of the middle guard plate;

[0030] Figure 7 A schematic diagram of the structure of another elastic member provided in an embodiment of the present application.

[0031] The above drawings have shown clear embodiments of the present application, which will be described in more detail later. These drawings and text descriptions are not intended to limit the scope of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments.

[0032] Description of reference numerals:

[0033] 100-housing; 110-mounting slot; 120-bottom plate; 130-side plate; 140-partition plate;

[0034] 200-battery cell group; 210-solid-state battery cell unit;

[0035] 300-elastic member; 310-mounting plate; 311-avoidance hole; 312-first side; 313-second side; 320-spring sheet; 330-smooth portion;

[0036] 400-Guard Plate. DETAILED DESCRIPTION

[0037] The exemplary embodiments will be described in detail below, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0038] In the related art, a solid-state battery includes an outer container and a plurality of battery cells arranged in sequence, wherein the outer container has an installation cavity, and one side of the installation cavity has an opening. When installing the solid-state battery, firstly, a pulling force is applied to the two opposite surfaces of the outer container toward the side away from the installation cavity to open the outer container, and then the plurality of battery cells are placed in the installation cavity through the opening, and finally the outer container is released. However, the assembly scheme of the above-mentioned solid-state battery is relatively complicated and the assembly efficiency is low.

[0039] Based on this, an embodiment of the present application provides a battery pack, including a shell, at least one elastic member and a plurality of solid-state battery cell units, wherein the shell has at least one mounting groove, and the plurality of solid-state battery cell units are sequentially arranged in the mounting groove. When assembling the battery pack, each solid-state battery cell unit is first placed in the mounting groove in sequence, and then the elastic member is correspondingly inserted between the solid-state battery cell unit and the inner wall of the mounting groove, or the elastic member is correspondingly inserted between two adjacent solid-state battery cell units, so that the elastic member abuts against the solid-state battery cell unit, and the solid-state battery cell unit will exert a force on the elastic member, thereby compressing the elastic member, and the elastic member can exert an elastic force on the solid-state battery cell unit, thereby confining each solid-state battery cell unit in the mounting groove. At the same time, when the solid-state battery cell unit expands or contracts, the elastic force of the elastic member can be used to provide constraints for the solid-state battery cell unit, so that the solid-state battery cell unit is always within the working pressure range, ensuring the cycle life and charge and discharge performance of the battery pack. When assembling the elastic member, the elastic member can be inserted into the installation groove by directly applying pressure to the elastic member. The assembly method is relatively simple and convenient, thereby making the assembly method of the battery pack more convenient, reducing the assembly time of the battery pack and improving the assembly efficiency.

[0040] The embodiments of the present application are described below with reference to the accompanying drawings.

[0041] Reference Figure 1 , Figure 2 and Figure 3 An embodiment of the present application provides a battery pack, including a shell 100, at least one elastic member 300 and a plurality of solid-state battery cell units 210, the shell 100 has at least one mounting groove 110, and the plurality of solid-state battery cell units 210 are sequentially arranged in the mounting groove 110.

[0042] The elastic member 300 is correspondingly inserted between the solid-state battery cell unit 210 and the inner wall of the installation groove 110 , and / or the elastic member 300 is correspondingly inserted between two adjacent solid-state battery cell units 210 to restrict each solid-state battery cell unit 210 in the installation groove 110 .

[0043] The expansion direction of the solid-state battery cell 210 is mainly Figure 3 In the direction indicated by Y in the figure, the arrangement direction of the plurality of solid-state battery core units 210 is the same as the main expansion direction of the solid-state battery core units 210, that is, the plurality of solid-state battery core units 210 are arranged along Figure 3 The cells are arranged in sequence in the direction indicated by Y to form a battery cell group 200 .

[0044] Exemplarily, multiple solid-state battery cells 210 can be combined in different connection modes, and the total positive electrode and the total negative electrode are led out of the housing 100. The number of solid-state battery cells 210 and their connection modes can be adjusted to meet different voltage and capacity requirements of the battery pack. Among them, the main connection modes of the solid-state battery cells 210 include series connection, parallel connection, and series-parallel mixed connection.

[0045] The elastic member 300 has elastic force, so that the elastic member 300 will be deformed when subjected to external force, and can return to the initial state after the external force disappears.

[0046] Exemplarily, the shell 100 includes a bottom plate 120 and four side plates 130. The bottom plate 120 is rectangular. The four side plates 130 are all arranged on the same side of the bottom plate 120 and are respectively connected to the four sides of the bottom plate 120. The bottom plate 120 and the four side plates 130 jointly define a accommodating cavity. The battery cell group 200 and the elastic member 300 are both located in the accommodating cavity, and the solid-state battery cell unit 210 and the elastic member 300 are both parallel to two of the side plates that are oppositely arranged. Further, the shell 100 also includes at least one partition 140, which is arranged in the accommodating cavity to divide the accommodating cavity into at least two mounting grooves 110. The battery cell groups 200 are located in the mounting grooves 110 one by one, and there is an assembly gap between the battery cell groups 200 and the inner wall of the mounting groove 110 in the setting direction of the battery cell groups 200, and at least one elastic member 300 is inserted in each assembly gap. For example, the number of partitions 140 is one, and the partitions 140 are arranged along Figure 3 The arrangement is in the direction shown by Y, the number of the mounting slots 110 is two, and the two battery cell groups 200 are respectively located in the two mounting slots 110 .

[0047] In some embodiments, when the battery pack needs to be repaired, the housing 100 can be removed first, and then the battery cell group 200 and the elastic member 300 can be taken out. Exemplarily, the bottom plate 120 is removed first, and then pressure is applied to the elastic member 300 to push the elastic member 300 out of the mounting groove 110, and then the battery cell group 200 can be taken out.

[0048] Specifically, when assembling the battery pack, first place the battery cell group 200 in the mounting groove 110, and place the battery cell group 200 in the mounting groove 110. Figure 3 There is an assembly gap between the inner wall of the mounting groove 110 in the Y direction as shown. Then, the elastic member 300 is placed opposite to the bottom of the mounting groove 110, and the elastic member 300 is subjected to the following Figure 3 The pressure toward the bottom of the mounting groove 110 shown in F is used to insert the elastic member 300 into the assembly gap.

[0049] When the elastic member 300 is inserted into the assembly gap, the elastic member 300 abuts against the inner wall of the battery cell group 200 and the installation groove 110 at the same time, and the battery cell group 200 applies a force to the elastic member 300 to compress the elastic member 300. At the same time, the elastic member 300 generates an elastic force on the battery cell group 200, and then the elastic force of the elastic member 300 can provide constraints for the battery cell group 200, fix the battery cell group 200 in the installation groove 110, and ensure good contact between two adjacent solid-state battery cell units 210 in the battery cell group 200, thereby ensuring the electrical performance of the battery cell group 200.

[0050] For example, the battery pack 200 is Figure 3 There is a first end and a second end in the direction indicated by Y, and the number of elastic members 300 can be two, and the two elastic members 300 are respectively inserted between the solid-state battery cell unit 210 at the first end and the inner wall of the installation groove 110 and between the solid-state battery cell unit 210 at the second end and the inner wall of the installation groove 110.

[0051] In other examples, the battery pack 200 Figure 3 The solid-state battery cell units 210 at both ends of the direction indicated by Y are in contact with the inner wall of the mounting groove 110 , and there is an assembly gap between two adjacent solid-state battery cell units 210 , and the elastic member 300 is inserted into the assembly gap.

[0052] It is understandable that the number of the elastic members 300 may be at least two, and each elastic member 300 is inserted between the solid-state battery cell unit 210 and the inner wall of the mounting groove 110 and between two adjacent solid-state battery cell units 210 .

[0053] The battery pack provided by the embodiment of the present application, when assembled, firstly, each solid-state battery cell unit 210 is sequentially placed in the installation groove 110, and then the elastic member 300 is correspondingly inserted between the solid-state battery cell unit 210 and the inner wall of the installation groove 110, or the elastic member 300 is inserted between two adjacent solid-state battery cell units 210, so that the elastic member 300 abuts against the solid-state battery cell unit 210, and the solid-state battery cell unit 210 will exert a force on the elastic member 300, thereby compressing the elastic member 300, and the elastic member 300 will exert an elastic force on the solid-state battery cell unit 210, so that each solid-state battery cell unit 210 can be restricted in the installation groove 110. At the same time, when the solid-state battery cell unit 210 expands or contracts, the elastic force of the elastic member 300 can be used to provide constraints for the solid-state battery cell unit 210, so that the solid-state battery cell unit 210 is always within the working pressure range, ensuring the cycle life and charge and discharge performance of the battery pack. When assembling the elastic member 300, the elastic member 300 can be inserted into the installation groove 110 by directly applying pressure to the elastic member 300. The assembly method is relatively simple and convenient, thereby making the assembly method of the battery pack more convenient, reducing the assembly time of the battery pack, and improving the assembly efficiency.

[0054] Reference Figure 3 and Figure 4 In some embodiments, the elastic member 300 includes a mounting plate 310 and at least one spring sheet 320 disposed on the mounting plate 310 , and the spring sheet 320 faces the inner wall of the solid-state battery cell unit 210 or the mounting groove 110 .

[0055] The spring sheet 320 is disposed on at least one of a side of the mounting plate 310 facing the solid-state battery cell unit 210 and a side of the mounting plate 310 facing the inner wall of the mounting groove 110. At least one end of the spring sheet 320 is elastically connected to the mounting plate 310, and when the spring sheet 320 is compressed by the battery cell group 200, the spring sheet 320 moves toward the mounting plate 310.

[0056] The projections of the spring pieces 320 on the solid-state battery cell unit 210 are all located inside the solid-state battery cell unit 210 , so that the elastic force distribution of each spring piece 320 is more uniform.

[0057] It is understandable that the distance between the side of the spring sheet 320 away from the mounting plate 310 and the mounting plate 310 in the natural state can be determined according to the position of the battery cell group 200 in the battery cell group 200. Figure 3 The distance between one end in the direction indicated by Y and the inner wall of the mounting groove 110 is adjusted to adjust the elastic range of the spring piece 320 .

[0058] Exemplarily, the shape of the spring piece 320 may be a rectangle, an ellipse, or a combination of a part of a rectangle and a part of a semicircle.

[0059] In this way, the elastic force of the spring sheet 320 provides constraints on the battery cell group 200, and the battery cell group 200 is fixed in the installation groove 110. At the same time, the structure of the elastic member 300 is relatively simple.

[0060] In a specific implementation, the mounting plate 310 has a first side 312 and a second side 313 that are arranged opposite to each other. One end of the spring sheet 320 is arranged on the mounting plate 310 , the other end of the spring sheet faces the first side 312 , and the second side 313 faces the bottom of the mounting groove 110 .

[0061] One end of the spring piece 320 is connected to the mounting plate 310, and there is an angle between the spring piece 320 and the mounting plate 310, and the angle between each spring piece 320 and the mounting plate 310 is toward the first side 312, that is, Figure 4 The opposite direction of the direction indicated by Z.

[0062] It is understandable that the larger the angle between the spring sheet 320 and the mounting plate 310, the larger the distance between the side of the spring sheet 320 away from the mounting plate 310 in the natural state, thereby making the elastic range of the spring sheet 320 larger. Figure 3 The distance between one end in the direction indicated by Y and the inner wall of the mounting groove 110, the size of the elastic force that the elastic member 300 needs to provide, and other actual needs are adaptively set.

[0063] When the elastic member 300 is inserted into the mounting groove 110, the second side 313 of the mounting plate 310 is directed toward the bottom of the mounting groove 110, and the mounting plate 310 is placed vertically, with the second side 313 located below the first side 312. Figure 3 The pressure shown by F in the figure is applied to insert the mounting plate 310 into the mounting groove 110. Since the direction of the spring piece 320 is opposite to the direction of the applied pressure, when the mounting plate 310 is inserted into the mounting groove 110, the spring piece 320 is compressed by the battery cell group 200, that is, the angle between the spring piece 320 and the mounting plate 310 is reduced, so that when the elastic member 300 is inserted into the mounting groove 110, the resistance between the spring piece 320 and the inner wall of the mounting groove 110 or the solid battery cell unit 210 is small, the insertion of the elastic member 300 is more labor-saving and convenient, and the assembly efficiency of the elastic member 300 is high.

[0064] In a specific implementation, there are at least two spring pieces 320 , each spring piece 320 is parallel to each other, and each spring piece 320 faces the first side 312 , thereby making it easier to install the elastic member 300 , and at the same time, the elastic force range of the elastic member 300 is larger.

[0065] Reference Figure 4 In some embodiments, the mounting plate 310 has at least one avoidance hole 311 , and the spring sheet 320 corresponds to the avoidance hole 311 . The spring sheet 320 is compressed by the solid-state battery cell unit 210 to move toward the avoidance hole 311 .

[0066] Exemplarily, the number of the avoidance holes 311 is equal to the number of the spring sheets 320 , and the avoidance holes 311 and the spring sheets 320 are arranged in a one-to-one correspondence.

[0067] One end of the spring sheet 320 is connected to one end of the avoidance hole 311 . When the spring sheet 320 is compressed, the spring sheet 320 rotates relative to the connection between the spring sheet 320 and the avoidance hole 311 , so that the spring sheet 320 is at least partially inserted into the avoidance hole 311 .

[0068] In a specific implementation, the projection of the spring clip 320 on the mounting plate 310 is located in the avoidance hole 311 , so that the spring clip 320 can be compressed into the avoidance hole 311 by the battery cell assembly 200 , thereby expanding the compressible range of the spring clip 320 , thereby expanding the elastic force range of the spring clip 320 .

[0069] Exemplarily, the spring piece 320 matches the avoidance hole 311 , and the shape of the spring piece 320 is the same as the shape of the avoidance hole 311 .

[0070] In a specific implementation, the spring piece 320 is a stamped piece formed by stamping on the mounting plate 310 .

[0071] The thickness of the spring piece 320 is equal to the thickness of the mounting plate 310 , so that the elastic force of the spring piece 320 is relatively large.

[0072] In a specific implementation, the mounting plate 310 is punched by a punching device to form the spring piece 320 and the avoidance hole 311, and the spring piece 320 corresponds to the avoidance hole 311. Then, the elastic member 300 is heat-treated to make the spring piece 320 have higher elasticity.

[0073] For example, the elastic member 300 can be formed by stamping a steel plate. The spring pieces 320 are all located on the same surface of the mounting plate 310 to facilitate stamping of the elastic member 300 .

[0074] The spring piece 320 is stamped to have a higher structural strength and a more stable structure. Meanwhile, compared with the spring piece 320 and the mounting plate 310 being separately formed and then connected, the step of connecting the spring piece 320 and the mounting plate 310 can be omitted, and the production efficiency of the elastic member 300 is higher.

[0075] In a specific implementation, each of the spring pieces 320 is located on the same surface of the mounting plate 310 .

[0076] The solid-state battery cell unit 210 includes a battery cell body and a shell covering the outside of the battery cell body, and the battery cell body is protected by the shell. Exemplarily, the shell can be a soft shell or an aluminum shell.

[0077] Specifically, a spring sheet 320 is arranged on one side of the mounting plate 310, and a side of the mounting plate 310 facing away from the spring sheet 320 is relatively flat. Therefore, when the elastic member 300 is inserted, the side of the mounting plate 310 facing away from the spring sheet 320 is opposite to the solid-state battery cell unit 210, and the side of the mounting plate 310 provided with the spring sheet 320 is opposite to the inner wall of the mounting groove 110, so as to avoid scratching the outer shell of the solid-state battery cell unit 210 due to the spring sheet 320 contacting and rubbing on the solid-state battery cell unit 210. At the same time, the side of the mounting plate 310 facing away from the spring sheet 320 is in contact with the solid-state battery cell unit 210, so that the contact area between the mounting plate 310 and the solid-state battery cell unit 210 is larger, and the connection between the elastic member 300 and the solid-state battery cell unit 210 is relatively stable and reliable.

[0078] In a specific implementation, there are multiple spring pieces 320 , and each spring piece 320 is arranged in a rectangular array.

[0079] The spring sheets 320 are disposed on the mounting plate 310 at intervals, and each spring sheet 320 is opposite to the solid-state battery cell unit 210 .

[0080] Exemplarily, the projection of the solid-state battery cell unit 210 on the mounting plate 310 is a rectangle, the mounting plate 310 is a rectangular plate, and the projection of the solid-state battery cell unit 210 on the mounting plate 310 coincides with the mounting plate 310. The springs 320 are arranged in a rectangular array.

[0081] It is understandable that the arrangement of the spring pieces 320 may also be a linear array arrangement, a triangular array arrangement, a circular array arrangement, a honeycomb array arrangement, etc.

[0082] Specifically, each spring sheet 320 is arranged in a rectangular array on the same surface of the mounting plate 310, and the side of the mounting plate 310 where no spring sheet 320 is provided contacts the solid-state battery cell unit 210. When the solid-state battery cell unit 210 expands, the solid-state battery cell unit 210 applies pressure to the mounting plate 310, and the mounting plate 310 transmits the pressure to the spring sheet 320, so that all the spring sheets 320 are compressed and generate elastic force. The number of spring sheets 320 is large, and the contact area between the spring sheet 320 and the inner wall of the mounting groove 110 is large, so that the elastic force generated by the elastic member 300 is large, and the elastic member 300 provides a large restraining force on the battery cell group 200. Compared with the leaf spring in the prior art, the elastic member 300 has a simpler structure and a smaller mass, which improves the energy density of the elastic member 300.

[0083] In some embodiments, each spring piece 320 is along Figure 4 The direction indicated by Z and Figure 4 The springs 320 are arranged in the direction indicated by X, and each spring 320 is oriented toward Figure 4 The direction opposite to the direction indicated by Z. Figure 4 The multiple spring pieces 320 arranged in the direction indicated by X can be connected in sequence to further increase the elastic force of the elastic member 300 .

[0084] In some embodiments, the spring piece 320 contacts the solid-state battery cell unit 210. Since the expansion degree of different positions of the solid-state battery cell unit 210 is different, the pressure applied by the solid-state battery cell unit 210 to the spring pieces 320 at different positions is also different, so that the compression degree of each spring piece 320 is different, and the elastic force applied by each spring piece 320 to the solid-state battery cell unit 210 is also different. Therefore, by providing a plurality of spring pieces 320 arranged in an array, so that each spring piece 320 can adapt to the expansion degree of different positions of the solid-state battery cell unit 210, the contact area between each spring piece 320 and the solid-state battery cell unit 210 is larger, and the abutment between the elastic member 300 and the solid-state battery cell unit 210 is more stable.

[0085] Reference Figure 3 and Figure 5 In a specific implementation, a smooth portion 330 is provided on at least one of a side of the mounting plate 310 facing away from the spring sheet 320 and a side of the spring sheet 320 facing away from the mounting plate 310 .

[0086] Among them, the elastic member 300 and the battery pack 200 are Figure 3When the distance between one end in the direction indicated by Y in the figure and the inner wall of the mounting groove 110 is less than that between the one end and the inner wall of the mounting groove 110, the smooth part 330 contacts the solid-state battery cell 210 or the inner wall of the mounting groove 110 and generates friction. Compared with the mounting plate 310 and the spring 320, the friction coefficient of the smooth part 330 is lower, so that the friction between the elastic member 300 and the inner wall of the mounting groove 110 or the solid-state battery cell 210 is smaller, and then the resistance when the elastic member 300 is inserted into the mounting groove 110 is smaller, so that the insertion of the elastic member 300 is more labor-saving, and no harsh noise is generated due to excessive friction, and at the same time, the damage to the inner wall of the mounting groove 110 and the solid-state battery cell 210 is less.

[0087] Specifically, each spring piece 320 is disposed on one side of the mounting plate 310. The elastic member 300 is inserted into the battery pack 200. Figure 3 When the distance between one end in the direction indicated by Y and the inner wall of the mounting groove 110 is measured, the side of the mounting plate 310 on which the spring sheet 320 is not provided and the side of the spring sheet 320 facing away from the mounting plate 310 will contact the solid-state battery cell unit 210 or the inner wall of the mounting groove 110. Therefore, a smooth portion 330 is provided on both the side of the mounting plate 310 on which the spring sheet 320 is not provided and the side of the spring sheet 320 facing away from the mounting plate 310.

[0088] In a specific implementation, the smooth portion 330 is a smooth layer covering at least one of a side of the mounting plate 310 facing away from the elastic sheet 320 and a side of the elastic sheet 320 facing away from the mounting plate 310 .

[0089] It is understandable that the smooth layer can be coated or bonded on the surface of the mounting plate 310 or the surface of the spring 320 so that the smooth layer is firmly connected to the surface of the mounting plate 310 or the surface of the spring 320 and is not easy to fall off.

[0090] For example, the smooth layer can be a graphite layer. The graphite layer is not easy to crack when subjected to pressure, so as to avoid the elastic member 300 from being inserted into the battery pack 200. Figure 3 The distance between one end in the direction indicated by Y and the inner wall of the mounting groove 110 affects the insertion of the elastic member 300 .

[0091] Reference Figure 2 , Figure 3 , Figure 4 and Figure 6 In some embodiments, the battery pack provided in the embodiments of the present application further includes at least one protective plate 400 , the protective plate 400 is located in the mounting groove 110 , and the protective plate 400 is located between the elastic member 300 and the solid-state battery cell unit 210 adjacent to the protective plate 400 .

[0092] Exemplarily, the protective plate 400 is located in the setting direction of the battery cell group 200, and the projection of the solid-state battery cell unit 210 on the protective plate 400 is located inside the protective plate 400, so that the protective plate 400 can completely cover the expansion surface of the solid-state battery cell unit 210, thereby better protecting the solid-state battery cell unit 210. For example, the solid-state battery cell unit 210 is a rectangular parallelepiped, and the protective plate 400 is also a rectangular parallelepiped, and the projection of the solid-state battery cell unit 210 in the setting direction of the battery cell group 200 and the projection of the protective plate 400 in the setting direction of the battery cell group 200 overlap.

[0093] It is understandable that the guard plate 400 can be solid or hollow. The guard plate 400 is made of a material that is not easily deformed under high pressure, is wear-resistant and has a low density. For example, the guard plate 400 can be made of aluminum alloy.

[0094] Specifically, when assembling the battery pack, the battery cell group 200 is first placed in the housing 100, and then the protective plate 400 is placed on the battery cell group 200. Figure 3 One side of one end in the direction indicated by Y in the figure, and make the protective plate 400 abut against the solid-state battery cell unit 210, and finally insert the elastic member 300 between the protective plate 400 and the inner wall of the installation groove 110.

[0095] In this way, the protective plate 400 is disposed between the elastic member 300 and the solid-state battery cell unit 210 to transfer the expansion force of the solid-state battery cell unit 210 to the elastic member 300, and transfer the elastic force of the elastic member 300 to the solid-state battery cell unit 210. At the same time, the solid-state battery cell unit 210 is protected to prevent the elastic member 300 from directly contacting the solid-state battery cell unit 210 and moving on the solid-state battery cell unit 210 when inserted, thereby scratching the outer shell of the solid-state battery cell unit 210. In addition, when the elastic member 300 is inserted, the protective plate 400 contacts and rubs against the elastic member 300 to disperse the downward sliding force of the elastic member 300.

[0096] It should be noted that when the elastic member 300 is inserted between the battery cell group 200 and the inner wall of the installation groove 110 , one guard plate 400 is in contact with the solid battery cell unit 210 at the end of the battery cell group 200 .

[0097] In other examples, the elastic member 300 is inserted between two solid-state battery cells 210, and at least one protective plate 400 is disposed on at least one side of the elastic member 300 and abuts against each spring sheet 320 to prevent the spring sheet 320 from scratching the housing of the solid-state battery cell 210. Figure 5 When all the spring pieces 320 are arranged on the same surface of the mounting plate 310, the number of the guard plate 400 may be one. Figure 7When spring sheets 320 are disposed on two opposite sides of the mounting plate 310 , the number of the guard plates 400 is two, and the two guard plates 400 are respectively located on both sides of the elastic member 300 , so that the two guard plates 400 are respectively in contact with each spring sheet 320 .

[0098] It can be understood that when the spring pieces 320 are respectively arranged on two surfaces of the mounting plate 310 , the spring pieces 320 on the two surfaces of the mounting plate 310 can be arranged opposite to each other or staggered.

[0099] In some embodiments, one of the guard plate 400 and the elastic member 300 has at least one slide groove, and the other has at least one slider, and the slider is correspondingly inserted into the slide groove.

[0100] The slider matches the slide groove. When the elastic member 300 is inserted into one side of the guard plate 400, the slider must first be aligned with the slide groove, and pressure is applied to the elastic member 300 to move the elastic member 300 toward the bottom of the installation groove 110. At this time, the slider is inserted into the slide groove and slides along the slide groove. Thus, the insertion position of the elastic member 300 can be positioned and guided by the slide groove and the slider, ensuring that the insertion position of the elastic member 300 is relatively accurate.

[0101] Exemplarily, a slide groove is provided on the guard plate 400 , and a slide block is provided on the side of the mounting plate 310 facing away from the spring sheet 320 .

[0102] On the basis of the above-mentioned embodiments, an embodiment of the present application provides an electrical device, including a device body, on which at least one battery pack is arranged.

[0103] Among them, the specific structure of the battery pack has been described in detail in the above embodiments and will not be repeated here.

[0104] Exemplarily, the electrical equipment is a vehicle.

[0105] The electrical equipment provided in the embodiment of the present application, when assembling the battery pack, firstly, each solid-state battery cell unit 210 is sequentially placed in the installation groove 110, and then the elastic member 300 is correspondingly inserted between the solid-state battery cell unit 210 and the inner wall of the installation groove 110, or the elastic member 300 is inserted between two adjacent solid-state battery cell units 210, so that the elastic member 300 abuts against the solid-state battery cell unit 210, and the solid-state battery cell unit 210 will exert a force on the elastic member 300, thereby compressing the elastic member 300, and the elastic member 300 will exert an elastic force on the solid-state battery cell unit 210, so that each solid-state battery cell unit 210 can be restricted in the installation groove 110. At the same time, when the solid-state battery cell unit 210 expands or contracts, the elastic force of the elastic member 300 can be used to provide constraints for the solid-state battery cell unit 210, so that the solid-state battery cell unit 210 is always within the working pressure range, ensuring the cycle life and charge and discharge performance of the battery pack. When assembling the elastic member 300, the elastic member 300 can be inserted into the installation groove 110 by directly applying pressure to the elastic member 300. The assembly method is relatively simple and convenient, thereby making the assembly method of the battery pack more convenient, reducing the assembly time of the battery pack, and improving the assembly efficiency.

[0106] The terms "first", "second", etc. in the specification and claims of the embodiments of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the embodiments of the present application described here. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0107] In the embodiments of the present application, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have specific orientations, or to be constructed and operated in specific orientations. Moreover, in addition to being used to indicate orientations or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present application can be understood according to the specific circumstances.

[0108] In addition, the terms "disposed", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0109] Unless otherwise stated, the term "plurality" means two or more.

[0110] Those skilled in the art will readily appreciate other embodiments of the present application after considering the specification and practicing the application disclosed herein. The present application is intended to cover any modification, use or adaptation of the present application, which follows the general principles of the present application and includes common knowledge or customary techniques in the art that are not disclosed in the present application. The specification and examples are intended to be exemplary only, and the scope of the present application is limited only by the appended claims.

Claims

1. A battery pack, characterized in that: It comprises a housing (100), at least one elastic member (300) and a plurality of solid-state battery core units (210); The housing (100) has at least one installation slot (110), and the plurality of solid-state battery core units (210) are sequentially arranged in the installation slot (110); The elastic member (300) is correspondingly inserted between the solid-state battery cell unit (210) and the inner wall of the installation groove (110), and / or the elastic member (300) is correspondingly inserted between two adjacent solid-state battery cell units (210) to restrict each solid-state battery cell unit (210) within the installation groove (110).

2. The battery pack according to claim 1, characterized in that: The elastic member (300) comprises a mounting plate (310) and at least one elastic sheet (320) arranged on the mounting plate (310), wherein the elastic sheet (320) faces the inner wall of the solid-state battery cell unit (210) or the mounting groove (110).

3. The battery pack according to claim 2, characterized in that: The mounting plate (310) has a first side (312) and a second side (313) that are arranged opposite to each other, one end of the spring sheet (320) is arranged on the mounting plate (310), the other end of the spring sheet (320) faces the first side (312), and the second side (313) faces the bottom of the mounting groove (110).

4. The battery pack according to claim 3, characterized in that: The number of the spring pieces (320) is at least two, and the spring pieces (320) are parallel to each other.

5. The battery pack according to claim 2, characterized in that: The mounting plate (310) is provided with at least one avoidance hole (311), the spring sheet (320) corresponds to the avoidance hole (311), and the spring sheet (320) is compressed by the solid-state battery cell unit (210) to move toward the avoidance hole (311).

6. The battery pack according to claim 5, characterized in that: The projection of the elastic sheet (320) on the mounting plate (310) is located inside the avoidance hole (311).

7. The battery pack according to claim 5, characterized in that: The spring sheet (320) is a stamped sheet formed by stamping on the mounting plate (310).

8. The battery pack according to claim 2, characterized in that: Each of the elastic sheets (320) is located on the same surface of the mounting plate (310).

9. The battery pack according to claim 8, characterized in that: There are a plurality of spring pieces (320), and each of the spring pieces (320) is arranged in a rectangular array.

10. The battery pack according to claim 8, characterized in that: A smooth portion (330) is provided on at least one of a surface of the mounting plate (310) facing away from the elastic sheet (320) and a surface of the elastic sheet (320) facing away from the mounting plate (310).

11. The battery pack according to claim 10, characterized in that: The smooth portion (330) is a smooth layer covering at least one of a side of the mounting plate (310) facing away from the elastic sheet (320) and a side of the elastic sheet (320) facing away from the mounting plate (310).

12. The battery pack according to any one of claims 1 to 11, characterized in that: It also includes at least one protective plate (400), wherein the protective plate (400) is located in the installation groove (110), and the protective plate (400) is located between the elastic member (300) and the solid-state battery cell unit (210) adjacent to the protective plate (400).

13. The battery pack according to claim 12, characterized in that: One of the guard plate (400) and the elastic member (300) has at least one slide groove, and the other has at least one slider, and the slider is correspondingly inserted into the slide groove.

14. An electrical device, characterized in that: The device comprises a device body on which is arranged at least one battery pack as described in any one of claims 1 to 13.

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