Battery and terminal

Abstract

The utility model provides a battery and a terminal, and belongs to the technical field of terminals. The battery comprises a plurality of winding battery cells and a shell, the plurality of winding battery cells are stacked, and at least two winding battery cells in the plurality of winding battery cells are different in size; the shape of the shell is matched with the shape of the stacked winding battery cells, and the winding battery cells are positioned in an inner cavity of the shell. According to the invention, the good effect and the production efficiency of the battery are improved.

Description

Technical Field

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

[0002] In some terminals, after the components inside the terminal are arranged, the space reserved for the battery compartment may not be a regular square shape. At this time, in order to improve space utilization, the shape of the battery compartment will be set to a matching irregular square shape, such as a step type, tower type, etc. Correspondingly, the battery will also be set to an irregular square shape that matches the shape of the battery compartment.

[0003] Currently, irregular square-shaped batteries are realized through a stacked structure.

[0004] However, the stacking process requires high precision, and each stack needs to be precisely aligned with other stacks, resulting in low effectiveness and production efficiency of this type of battery. Utility Model Content

[0005] The embodiments of the present disclosure provide a battery and a terminal, which can solve the technical problems existing in the related technologies. The technical solutions of the battery and the terminal are as follows:

[0006] In one aspect, an embodiment of the present disclosure provides a battery, the battery comprising a plurality of wound battery cells and a casing;

[0007] The multiple wound battery cells are stacked, and at least two of the multiple wound battery cells have different sizes;

[0008] The shape of the shell is adapted to the shape of the plurality of wound battery cells after being stacked, and the plurality of wound battery cells are located in the inner cavity of the shell.

[0009] In a possible implementation, the plurality of wound battery cells are electrically connected.

[0010] In a possible implementation, the wound battery cell has a battery cell positive terminal and a battery cell negative terminal, and the plurality of wound battery cells are electrically connected via the battery cell positive terminal and the battery cell negative terminal.

[0011] In a possible implementation, the housing has a first through hole;

[0012] An end of a target cell positive terminal of one of the multiple wound battery cells passes through the first through hole and extends to the outside of the shell, and a portion of the target cell positive terminal located in the inner cavity of the shell is electrically connected to the cell positive terminals or cell negative terminals of other wound battery cells among the multiple wound battery cells, and a portion of the target cell positive terminal located outside the shell is used to be electrically connected to the mainboard positive terminal of the terminal mainboard.

[0013] In a possible implementation, the housing has a second through hole;

[0014] An end of a target battery cell negative terminal of one of the multiple wound battery cells passes through the second through hole and extends to the outside of the shell, and a portion of the target battery cell negative terminal located in the inner cavity of the shell is electrically connected to the positive battery terminal or the negative battery terminal of other wound battery cells among the multiple wound battery cells, and a portion of the target battery cell negative terminal located outside the shell is used to be electrically connected to the mainboard negative terminal of the terminal mainboard.

[0015] In a possible implementation, the plurality of wound battery cells are connected in parallel.

[0016] In a possible implementation, the plurality of wound battery cells are connected in series.

[0017] In a possible implementation, the wound battery core has two first side surfaces that are arranged opposite to each other, and a plane where the first side surfaces are located is arranged parallel to a winding axis of the wound battery core;

[0018] The plurality of wound battery cells are connected in sequence through two first side surfaces of each wound battery cell, and are stacked and arranged along a direction perpendicular to the first side surfaces.

[0019] In a possible implementation manner, lengths of the plurality of wound battery cells in a first direction are at least partially different, wherein the first direction is a direction perpendicular to a winding axis of the wound battery cell and parallel to the first side surface.

[0020] In a possible implementation, in a direction perpendicular to the first side surface, lengths of the plurality of wound battery cells in the first direction decrease sequentially.

[0021] In a possible implementation manner, the plurality of wound battery cells have two ends that are arranged opposite to each other in the first direction, and one of the ends of the plurality of wound battery cells is arranged flush.

[0022] In a possible implementation manner, the plurality of wound battery cells are arranged opposite to each other in the first direction.

[0023] In a possible implementation, the battery further includes an electrolyte;

[0024] The electrolyte is located in the inner cavity of the shell and is in contact with the plurality of wound battery cells.

[0025] In a possible implementation, the battery further includes a sealing member;

[0026] The shell has a liquid injection hole for injecting the electrolyte into the inner cavity of the shell;

[0027] The blocking member is located at a position corresponding to the injection hole and is connected to the shell to block the injection hole.

[0028] In a possible implementation, the battery further includes a protection circuit board, which is located outside the shell and connected to the shell, and the protection circuit board is electrically connected to the plurality of wound battery cells.

[0029] On the other hand, an embodiment of the present disclosure provides a terminal, the terminal comprising a terminal body and a battery as described in any one of the above items;

[0030] The terminal body has a battery compartment, and the shape of the battery compartment is adapted to the shape of the battery housing;

[0031] The battery shell is located in the battery compartment and is connected to the terminal body.

[0032] The technical solution provided by the embodiments of the present disclosure includes at least the following beneficial effects:

[0033] An embodiment of the present disclosure provides a battery, which includes a plurality of wound battery cells. The plurality of wound battery cells are stacked and at least two of the wound battery cells are of different sizes to achieve an irregular square shape of the battery. Since the number of wound battery cells is much smaller than the number of laminated sheets, the process requirements for stacking the plurality of wound battery cells are relatively simpler, thereby improving the performance and production efficiency of the battery.

[0034] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0036] Figure 1 is a schematic diagram of the structure of a battery shown in an embodiment of the present disclosure;

[0037] Figure 2 is a schematic diagram of the structure of a battery shown in an embodiment of the present disclosure;

[0038] Figure 3 is a schematic diagram of the structure of a battery shown in an embodiment of the present disclosure;

[0039] Figure 4 is a cross-sectional schematic diagram of a battery shown in an embodiment of the present disclosure;

[0040] Figure 5 This embodiment of the present disclosure shows Figure 4 A partial enlarged schematic diagram of part A;

[0041] Figure 6 is a schematic diagram of a structure of multiple wound battery cells shown in an embodiment of the present disclosure;

[0042] Figure 7 is a schematic diagram of a structure of multiple wound battery cells shown in an embodiment of the present disclosure;

[0043] Figure 8 is a cross-sectional schematic diagram of a housing shown in an embodiment of the present disclosure;

[0044] Fig. 9 This embodiment of the present disclosure shows Figure 8 A partial enlarged schematic diagram of part B.

[0045] Legend

[0046] 1. Wound battery cell; 2. Shell; 3. Electrolyte; 4. Double-sided tape;

[0047] 11. Battery cell positive terminal; 12. Battery cell negative terminal;

[0048] 21. a first through hole; 22. a second through hole;

[0049] m, first side; n, winding axis; k, first direction; d, end. DETAILED DESCRIPTION

[0050] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0051] The present disclosure provides a battery, such as Figure 1 , Figure 2 and Figure 3 As shown, the battery includes a plurality of wound battery cells 1 and a casing 2 .

[0052] Among them, a plurality of wound battery cells 1 are stacked, and at least two of the plurality of wound battery cells 1 have different sizes, so that the stacked plurality of wound battery cells 1 can be combined into an irregular square shape. Different stacking arrangements and different sizes can be combined into different irregular square shapes, for example, Figure 2 The two wound battery cells 1 are stacked.

[0053] It can be understood that the number of multiple wound battery cells 1 in the embodiment of the present disclosure is not limited to the stacking between the two wound battery cells 1 listed above, but can also be the stacking between other numbers of wound battery cells 1, for example, it can be 3, 5, etc., and the irregular square shape of the battery compartment in the terminal can be set according to the arrangement of the components in the terminal, and the number of wound battery cells 1 can be set according to the shape of the battery compartment. The embodiment of the present disclosure does not make specific limitations on this.

[0054] The sizes of the multiple wound battery cells 1 in the embodiment of the present disclosure may also be arbitrarily reasonably set. For example, the sizes of the multiple wound battery cells 1 may all be different, or the sizes of some unconnected wound battery cells 1 in the multiple wound battery cells 1 may be the same, and the sizes of the remaining wound battery cells 1 may be different (for example, the battery includes three wound battery cells 1, and the three wound battery cells 1 are connected in sequence, the sizes of the wound battery cells 1 at both ends are the same, and the size of the wound battery cell 1 in the middle is different from the sizes of the other two wound battery cells 1), etc. The irregular square shape of the battery compartment in the terminal may be set according to the arrangement of the components in the terminal, and the size of each wound battery cell 1 may be set according to the shape of the battery compartment, and the embodiment of the present disclosure does not specifically limit this.

[0055] It can be understood that the size of the above-mentioned wound battery cell 1 includes the length, width and height of the wound battery cell 1. The difference in size between two wound battery cells 1 can be any one or more of the length, height and width, and the embodiment of the present disclosure is not limited to this.

[0056] The connection positions between the multiple wound battery cells 1 in the embodiment of the present disclosure may also be set in any reasonable manner. In a possible implementation, for example Figure 3 , Figure 4 , Figure 5 As shown, the wound battery cell 1 has two oppositely arranged first side surfaces m, the plane where the first side surfaces m are located is arranged parallel to the winding axis n of the wound battery cell 1, and a plurality of wound battery cells 1 are connected in sequence through the two first side surfaces m of each wound battery cell 1, and are stacked and arranged in a direction perpendicular to the first side surfaces m.

[0057] That is, the plurality of wound battery cells 1 are distributed along a direction perpendicular to the first side surface m, and two adjacent wound battery cells 1 are connected by being connected to each other via their respective first side surfaces m.

[0058] In a possible implementation, the size of the multiple wound battery cells 1 may be set such that the lengths of the multiple wound battery cells in a first direction k are at least partially different, wherein the first direction k is a direction perpendicular to the winding axis n of the wound battery cell 1 and parallel to the first side m. For example, Figure 3 , Figure 6 , Figure 7 The lengths of the multiple wound battery cells 1 in the first direction k are different.

[0059] Such an arrangement allows the stacked plurality of wound battery cells 1 to form an irregular square shape to fit into an irregular square battery compartment provided on the terminal, thereby improving space utilization.

[0060] On this basis, the lengths of the multiple wound battery cells 1 in the extension direction of the winding axis n can be the same, or at least partially different. Among them, since the connection terminals of the wound battery cells 1 (the battery cell positive terminal 11 and the battery cell negative terminal 12 to be described later) are usually arranged on the side perpendicular to the winding axis n, when the lengths of the multiple wound battery cells 1 in the extension direction of the winding axis n are the same, it is more convenient to electrically connect the multiple wound battery cells 1, for example Figure 2 and Figure 3 Two wound battery cells 1.

[0061] Similarly, the lengths of the plurality of wound battery cells 1 in the direction perpendicular to the first side surface m may be the same, or may be at least partially different, which is not specifically limited in the embodiment of the present disclosure.

[0062] In a possible implementation, in a direction perpendicular to the first side m, the lengths of the plurality of wound battery cells 1 in the first direction k decrease sequentially, for example, Figure 3 , Figure 6 , Figure 7 In this way, the positions of the components in the terminal close to the battery compartment can be arranged in a structure with increasing lengths in the first direction k, so that the connection areas between the components and the connection areas between the wound battery cells 1 are large, thereby improving the connection strength.

[0063] In a possible implementation, the plurality of wound battery cells 1 have two ends d arranged opposite to each other in the first direction k, and one of the ends d of the plurality of wound battery cells 1 is arranged flush with each other. Figure 6 shown.

[0064] This arrangement allows one of the ends d of the plurality of wound battery cells 1 to be flush, so as to be suitable for a battery compartment with a flush inner wall on one side and an irregular inner wall on the other side.

[0065] Further, in a direction perpendicular to the first side m, the lengths of the plurality of wound battery cells 1 in the first direction k are successively reduced, and one end d of the plurality of wound battery cells 1 is flushly arranged to form a Figure 6 The stepped irregular square shape shown.

[0066] In a possible implementation, the plurality of wound battery cells 1 are arranged opposite to each other in the first direction k. Figure 7 As shown. This arrangement allows the positions of both ends d of the multiple wound battery cells 1 to form an irregular square shape, so as to be suitable for battery compartments with irregular inner walls on both sides. Among them, the multiple wound battery cells 1 are arranged opposite to each other in the first direction k, which can also be understood as the winding axes n of the multiple wound battery cells 1 are in the same plane.

[0067] Furthermore, in a direction perpendicular to the first side m, the lengths of the plurality of wound battery cells 1 in the first direction k are successively reduced, and the plurality of wound battery cells 1 are arranged opposite to each other in the first direction k, so as to form a Figure 7 The irregular square shape of the tower shown.

[0068] The connection positions between the multiple wound battery cells 1 may also be other reasonable situations to form different irregular square shapes, which is not specifically limited in the embodiments of the present disclosure.

[0069] In one possible implementation, the structure of the wound battery cell 1 can be any reasonable structure. For example, the wound battery cell 1 can include a positive electrode sheet, a separator and a negative electrode sheet. The positive electrode sheet, the separator and the negative electrode sheet are stacked and arranged, and then wound into multiple turns along the length direction, thereby forming a wound battery cell 1 with a ring structure.

[0070] In a possible implementation, the plurality of wound battery cells 1 can be connected by gluing. It is understandable that, among the plurality of wound battery cells 1, each wound battery cell 1 can be connected to any other wound battery cell at any reasonable position, and the connection relationship can be set according to the position of each wound battery cell 1.

[0071] Further, such as Figure 3 , Figure 4 and Figure 5 As shown, the multiple wound battery cells 1 can be connected by double-sided adhesive tape 4. Of course, other reasonable connection methods can also be used to achieve the connection between the wound battery cells 1, for example, the connection between the wound battery cells 1 can be achieved by a snap-on structure, etc., which is not specifically limited in the embodiment of the present disclosure.

[0072] In a possible implementation, the multiple wound battery cells 1 may be electrically connected to supply power to the outside as a whole battery, or the multiple wound battery cells 1 may not all be electrically connected to supply power to the outside as multiple independent batteries, which is not limited in the embodiments of the present disclosure.

[0073] In a possible implementation, when the multiple wound battery cells 1 are electrically connected, they can be connected in series, thereby achieving voltage amplification and meeting external power supply requirements.

[0074] Alternatively, the plurality of wound battery cells 1 may be connected in parallel, so as to increase the battery capacity without affecting the battery voltage, thereby improving the utilization rate of the idle space of the battery.

[0075] The shape of the shell 2 is adapted to the shape of the multiple wound battery cells 1 after being stacked, and the multiple wound battery cells 1 are located in the inner cavity of the shell 2. That is, when the multiple wound battery cells 1 are stacked to form a two-layer step-type shape as a whole, the shape of the shell 2 is also a two-layer step-type shape; when the multiple wound battery cells 1 are stacked to form a three-layer tower-type shape as a whole, the shape of the shell 2 is also a three-layer tower-type shape, and so on.

[0076] In a possible implementation, the housing 2 may be an aluminum-plastic film or a steel shell, etc., which is not limited in the embodiment of the present disclosure.

[0077] In one possible implementation, Figure 4 and Figure 5 As shown, the battery may further include an electrolyte 3 , which is located in the inner cavity of the housing 2 and in contact with the plurality of wound battery cells 1 .

[0078] The electrolyte 3 may be a liquid electrolyte or a solid electrolyte, which is located in the inner cavity of the shell 2 and in contact with the plurality of wound battery cells 1 , so that the wound battery cells 1 can be charged and discharged under the action of the electrolyte 3 .

[0079] In one possible implementation, if the wound battery cell 1 includes a positive electrode sheet, a separator and a negative electrode sheet, the electrolyte 3 can not only contact with the outer layer of the wound battery cell 1, but also be filled between the positive electrode sheet and the separator, and between the separator and the negative electrode sheet, thereby increasing the contact area between the electrolyte 3 and the wound battery cell 1, thereby improving the overall performance of the wound battery cell 1.

[0080] In the disclosed embodiment, the shell 2 may also have a liquid injection hole for injecting the electrolyte 3 into the inner cavity of the shell 2 .

[0081] The battery further comprises a blocking member, the position of which corresponds to the position of the liquid injection hole and is connected to the housing 2 for blocking the liquid injection hole.

[0082] In this way, when producing batteries, multiple wound battery cells 1 can be placed in the inner cavity of the shell 2, and then the shell 2 is packaged. At this time, the shell 2 has only one opening, namely the injection hole, which connects the inside and the outside. The electrolyte 3 can be injected into the inner cavity of the shell 2 through the injection hole. Then, the injection hole can be sealed with a sealing member, thereby ensuring the sealing of the inner cavity of the shell 2.

[0083] In a possible implementation, the connection structure between the blocking member and the housing 2 may be any reasonable structure, for example, a direct welding connection or a snap-on connection, etc., which is not limited in the present embodiment.

[0084] In this way, providing the injection hole and the sealing member can make it easier to inject the electrolyte 3 into the inner cavity of the shell 2.

[0085] In a possible implementation, the battery may further include a protection circuit board, which is located on the outside of the shell 2 and connected to the shell 2. The protection circuit board is electrically connected to the multiple wound battery cells 1 to prevent the wound battery cells 1 from overcharging or over-discharging, thereby improving the safety and service life of the battery.

[0086] In the embodiment of the present disclosure, the connection structure for realizing electrical connection between the multiple wound battery cells 1 can be configured in various ways, and several structures are described below as examples:

[0087] In one possible implementation, Figure 2 and Figure 3 As shown, each wound battery cell 1 may have a battery cell positive terminal 11 and a battery cell negative terminal 12 , and the plurality of wound battery cells 1 are electrically connected via the battery cell positive terminal 11 and the battery cell negative terminal 12 .

[0088] When the multiple wound cells 1 are connected in series, if the number of wound cells 1 is n, the negative cell terminal 12 of each wound cell 1 in the first n-1 wound cells 1 is electrically connected to the positive cell terminal 11 of the last wound cell 1 according to the position arrangement of the n wound cells 1, thereby realizing the series connection of the n wound cells 1. The positive cell terminal of the front wound cell 1 and the negative cell terminal of the last wound cell 1 are both used for external connection of the battery.

[0089] When multiple wound battery cells 1 are connected in parallel, the positive cell terminals 11 of the multiple wound battery cells 1 are electrically connected, and the negative cell terminals 12 of the multiple wound battery cells 1 are electrically connected, so as to realize the parallel connection of the multiple wound battery cells.

[0090] Regardless of the series connection or the parallel connection, electrical connection can be achieved through contact between the positive terminals 11 of the battery cells, between the negative terminals 12 of the battery cells, and between the positive terminal 11 of the battery cell and the negative terminal 12 of the battery cell.

[0091] Furthermore, the positive terminals 11 of the battery cells, the negative terminals 12 of the battery cells, and the positive terminals 11 and the negative terminals 12 of the battery cells can be electrically connected by welding.

[0092] In another possible implementation, among the multiple wound battery cells 1 included in the battery, only a portion of the wound battery cells 1 have a battery cell positive terminal 11 and a battery cell negative terminal 12, and this portion of the wound battery cells 1 can be electrically connected through the battery cell positive terminal 11, the battery cell negative terminal 12, and the positive electrode sheets and negative electrode sheets of other wound battery cells 1.

[0093] The electrical connection structure between the multiple wound battery cells 1 in the embodiment of the present disclosure may also be any other reasonable connection structure, and the embodiment of the present disclosure does not specifically limit this.

[0094] In the embodiment of the present disclosure, the battery may also be provided with a terminal for electrically connecting to the mainboard of the terminal, and its structure may be as follows:

[0095] For the electrical connection structure between the positive electrode of the battery and the positive terminal of the terminal mainboard:

[0096] like Figure 8 and Fig. 9 As shown, the housing 2 may have a first through hole 21 .

[0097] An end of a target cell positive terminal 11 of one of the multiple wound battery cells 1 passes through the first through hole 21 and extends to the outside of the shell 2, and the portion of the target cell positive terminal 11 located in the inner cavity of the shell 2 is electrically connected to the cell positive terminal 11 or the cell negative terminal 12 of other wound battery cells 1 among the multiple wound battery cells 1, and the portion of the target cell positive terminal 11 located outside the shell 2 is used to be electrically connected to the mainboard positive terminal of the terminal's mainboard.

[0098] That is, the main board of the terminal has a main board positive terminal for electrically connecting to the positive electrode of the battery. According to the position of the main board positive terminal and the position of each wound battery cell 1, the positive terminal 11 of one of the wound battery cells 1 can be selected to extend out of the shell 2 for connection with the main board positive terminal of the terminal main board. The positive terminal 11 of the battery cell extending out of the shell 2 is called the target battery cell positive terminal 11. Then the remaining wound battery cells 1 are electrically connected to the part of the target battery cell positive terminal 11 located in the inner cavity of the shell 2, thereby realizing the electrical connection between the positive electrode of the battery and the positive terminal of the main board.

[0099] For example, Figure 2 and Figure 3 As shown, the positive cell terminals 11 of the two wound battery cells 1 in the figure are electrically connected, and the negative cell terminals 12 of the two wound battery cells 1 are electrically connected, thereby realizing the parallel connection of the two wound battery cells 1. The length of the target cell positive terminal 11 of one of the two wound battery cells 1 in the figure is longer, so that it can pass through the first through hole 21 and extend to the outside of the shell 2, and its part located on the outside of the shell 2 can be used to electrically connect with the mainboard positive terminal. The length of the cell positive terminal 11 of the other wound battery cell 1 is relatively short, and its end is located in the inner cavity of the shell 2 and is electrically connected to the target cell positive terminal 11, thereby realizing the parallel connection of the two wound battery cells 1, and the electrical connection between the battery and the mainboard positive terminal can be realized by extending the target cell positive terminal 11 of the shell 2.

[0100] For the electrical connection structure between the negative electrode of the battery and the negative terminal of the terminal mainboard:

[0101] like Figure 8 and Fig. 9 As shown, the housing 2 further has a second through hole 22 .

[0102] An end of a target cell negative terminal 12 of one of the multiple wound battery cells 1 passes through the second through hole 22 and extends to the outside of the shell 2, and a portion of the target cell negative terminal 12 located in the inner cavity of the shell 2 is electrically connected to a cell positive terminal 11 or a cell negative terminal 12 of one of the multiple wound battery cells 1, and a portion of the target cell negative terminal 12 located outside the shell 2 is used to be electrically connected to the mainboard negative terminal of the terminal's mainboard.

[0103] That is, the main board of the terminal has a main board negative terminal for electrically connecting to the negative electrode of the battery. According to the position of the main board negative terminal and the position of each wound battery cell 1, the negative terminal 12 of one of the wound battery cells 1 can be selected to extend out of the shell 2 for connection with the main board negative terminal of the terminal main board. The negative terminal 12 of the battery cell extending out of the shell 2 is called the target battery cell negative terminal 12. Then the remaining wound battery cells 1 are connected to the part of the target battery cell negative terminal 12 located in the inner cavity of the shell 2, thereby realizing the electrical connection between the negative electrode of the battery and the negative terminal of the main board.

[0104] For example, Figure 2 and Figure 3As shown, the positive cell terminals 11 of the two wound battery cells 1 in the figure are electrically connected, and the negative cell terminals 12 of the two wound battery cells 1 are electrically connected, thereby realizing the parallel connection of the two wound battery cells 1. The target cell negative terminal 12 of one of the two wound battery cells 1 in the figure is longer, so that it can pass through the second through hole 22 and extend to the outside of the shell 2, and its part located on the outside of the shell 2 can be used to electrically connect with the mainboard negative terminal. The length of the negative cell terminal 12 of the other wound battery cell 1 is relatively short, and its end is located in the inner cavity of the shell 2 and is electrically connected to the target cell negative terminal 12, thereby realizing the parallel connection of the two wound battery cells 1, and the electrical connection between the battery and the mainboard negative terminal can be realized by extending the target cell negative terminal 12 of the shell 2.

[0105] In one possible implementation, after the target battery cell positive terminal 11 passes through the first through hole 21, a sealing arrangement may be performed between the outer wall of the target battery cell positive terminal 11 and the inner wall of the first through hole 21, for example, by using glue to seal, etc., which is not limited in the disclosed embodiment.

[0106] Similarly, after the target battery cell negative terminal 12 passes through the second through hole 22, a sealing arrangement can be performed between the outer wall of the target battery cell negative terminal 12 and the inner wall of the second through hole 22, for example, by using glue to seal, etc., which is not limited in the disclosed embodiment.

[0107] If the battery includes a protection circuit board, the target cell positive terminal 11 can be electrically connected to the mainboard positive terminal through the protection circuit board, that is, the target cell positive terminal 11 can be electrically connected to the protection circuit board, and the protection circuit board is electrically connected to the mainboard positive terminal. Similarly, if the battery includes a protection circuit board, the target cell negative terminal 12 can be electrically connected to the mainboard negative terminal through the protection circuit board, that is, the target cell negative terminal 12 can be electrically connected to the protection circuit board, and the protection circuit board is electrically connected to the mainboard negative terminal.

[0108] In the embodiments of the present disclosure, the electrical connection structure between the battery and the mainboard is not limited to the above structure. For example, the electrical connection structure between the battery and the mainboard may also be:

[0109] The protection circuit board has a first positive terminal, a first negative terminal, a second positive terminal, and a second negative terminal.

[0110] The ends of the positive cell terminal 11 and the negative cell terminal 12 of the multiple wound battery cells 1 included in the battery are both located in the inner cavity of the shell 2, and the multiple wound battery cells 1 are electrically connected through the positive cell terminal 11 and the negative cell terminal 12.

[0111] The ends of the first positive terminal and the first negative terminal of the protection circuit board pass through the first through hole 21 and the second through hole 22 respectively, and extend into the inner cavity of the shell 2. The ends of the first positive terminal and the ends of the first negative terminal are electrically connected to the battery cell positive terminal 11 or the battery cell negative terminal 12 located in the inner cavity of the shell 2, thereby realizing the electrical connection between the protection circuit board and the battery.

[0112] The second positive terminal of the protection circuit board is electrically connected to the positive terminal of the main board, and the second negative terminal is electrically connected to the negative terminal of the main board, thus realizing the electrical connection between the protection circuit board and the main board. Thus, the electrical connection between the positive electrode of the battery and the positive terminal of the main board is realized through the first positive terminal and the second positive terminal of the protection circuit board, and the electrical connection between the negative electrode of the battery and the negative terminal of the main board is realized through the first negative terminal and the second negative terminal of the protection circuit board.

[0113] The above are only several possible electrical connection structures between the battery and the mainboard. The electrical connection between the battery and the mainboard in the embodiment of the present disclosure may also be other reasonable structures, which are not limited in the embodiment of the present disclosure.

[0114] An embodiment of the present disclosure further provides a terminal, which includes a terminal body and any one of the above-mentioned batteries.

[0115] The terminal body has a battery compartment, and the shape of the battery compartment is adapted to the shape of the battery housing 2 .

[0116] The battery housing 2 is located in the battery compartment and is connected to the terminal body.

[0117] For example, when the battery shell 2 has a step-type structure, the shape of the battery compartment is also a corresponding step-type structure. After the battery is installed in the battery compartment, the battery can be embedded in the battery compartment, making full use of the idle space in the terminal body, maximizing the volume of the battery compartment and the battery, thereby increasing the battery capacity and improving the overall performance of the battery and the terminal.

[0118] The technical solution provided by the embodiments of the present disclosure includes at least the following beneficial effects:

[0119] An embodiment of the present disclosure provides a battery, which includes a plurality of wound battery cells 1. The plurality of wound battery cells 1 are stacked to achieve an irregular square shape of the battery. Since the number of wound battery cells 1 is much smaller than the number of laminated sheets, the process requirements for stacking the plurality of wound battery cells 1 are relatively simpler, thereby improving the effectiveness and production efficiency of the battery.

[0120] Moreover, since the battery's performance and production efficiency are improved, the battery's production cost is greatly reduced and the battery's applicability is improved.

[0121] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A battery, characterized in that: The battery comprises a plurality of wound battery cells (1) and a casing (2); The plurality of wound battery cells (1) are stacked, and at least two of the plurality of wound battery cells (1) have different sizes; The shape of the shell (2) is compatible with the shape of the plurality of wound battery cells (1) after being stacked, and the plurality of wound battery cells (1) are located in the inner cavity of the shell (2).

2. The battery according to claim 1, characterized in that The multiple wound battery cells (1) are electrically connected.

3. The battery according to claim 2, characterized in that The wound battery cell (1) has a battery cell positive terminal (11) and a battery cell negative terminal (12), and the plurality of wound battery cells (1) are electrically connected via the battery cell positive terminal (11) and the battery cell negative terminal (12).

4. The battery according to claim 3, characterized in that The housing (2) has a first through hole (21); An end of a target cell positive terminal (11) of one of the multiple wound cell (1) passes through the first through hole (21) and extends to the outside of the shell (2); a portion of the target cell positive terminal (11) located in the inner cavity of the shell (2) is electrically connected to the cell positive terminal (11) or the cell negative terminal (12) of another wound cell (1) among the multiple wound cell (1); a portion of the target cell positive terminal (11) located outside the shell (2) is used to be electrically connected to the mainboard positive terminal of the terminal mainboard.

5. The battery according to claim 3, characterized in that The housing (2) has a second through hole (22); An end of a target cell negative terminal (12) of one of the multiple wound cell (1) passes through the second through hole (22) and extends to the outside of the shell (2); a portion of the target cell negative terminal (12) located in the inner cavity of the shell (2) is electrically connected to a cell positive terminal (11) or a cell negative terminal (12) of another wound cell (1) among the multiple wound cell (1); a portion of the target cell negative terminal (12) located outside the shell (2) is used to be electrically connected to a mainboard negative terminal of a mainboard of the terminal.

6. The battery according to claim 2, characterized in that The plurality of wound battery cells (1) are connected in parallel.

7. The battery according to claim 2, characterized in that The plurality of wound battery cells (1) are connected in series.

8. The battery according to claim 1, characterized in that The wound battery core (1) has two first side surfaces (m) arranged opposite to each other, and the plane where the first side surfaces (m) are located is arranged parallel to the winding axis (n) of the wound battery core (1); The plurality of wound battery cells (1) are connected in sequence via two first side surfaces (m) of each wound battery cell (1), and are stacked and arranged along a direction perpendicular to the first side surfaces (m).

9. The battery according to claim 8, characterized in that The lengths of the plurality of wound battery cells (1) in a first direction (k) are at least partially different, wherein the first direction (k) is a direction perpendicular to a winding axis (n) of the wound battery cell (1) and parallel to the first side surface (m).

10. The battery according to claim 9, characterized in that In a direction perpendicular to the first side surface (m), the lengths of the plurality of wound battery cells (1) in the first direction (k) decrease sequentially.

11. The battery according to claim 9, characterized in that The plurality of wound battery cells (1) have two ends (d) arranged opposite to each other in the first direction (k), and one of the ends (d) of the plurality of wound battery cells (1) is arranged flush.

12. The battery according to claim 9, characterized in that The plurality of wound battery cells (1) are arranged opposite to each other in the first direction (k).

13. The battery according to claim 1, characterized in that The battery also includes an electrolyte (3); The electrolyte (3) is located in the inner cavity of the shell (2) and is in contact with the plurality of wound battery cells (1).

14. The battery according to claim 13, characterized in that The battery further comprises a sealing member; The shell (2) is provided with a liquid injection hole for injecting the electrolyte (3) into the inner cavity of the shell (2); The position of the blocking member corresponds to the position of the liquid injection hole and is connected to the housing (2) to block the liquid injection hole.

15. The battery according to claim 1, characterized in that The battery further comprises a protection circuit board, which is located outside the shell (2) and connected to the shell (2), and is electrically connected to the plurality of wound battery cells (1).

16. A terminal, characterized in that: The terminal comprises a terminal body and a battery as claimed in any one of claims 1 to 15; The terminal body has a battery compartment, the shape of which matches the shape of the battery housing (2); The battery housing (2) is located in the battery compartment and is connected to the terminal body.

Images