Battery, battery module and vehicle

Abstract

The utility model discloses a battery, a battery module and a vehicle. The battery comprises a battery shell, a battery cell and a PTC (Positive Temperature Coefficient) thermistor, the battery shell comprises a shell body, a cover plate, a first pole and a second pole, the cover plate is connected with the shell body and defines a battery cell cavity, the first pole and the second pole are arranged on the cover plate in a spaced mode in the first direction, the first direction is orthogonal to the thickness direction of the cover plate, and the battery cell is arranged in the battery cell cavity and provided with a first tab and a second tab. The first tab is separated from the first pole along a first direction, the second tab is electrically connected with the second pole, the PTC thermistor is arranged in the battery cell cavity, the PTC thermistor is arranged between the first tab and the first pole along the first direction, and the first tab is electrically connected with the first pole through the PTC thermistor. The battery disclosed by the utility model can prevent the battery cell from further overcharging and heating when the temperature of the battery rises to a certain threshold value, and is compact in structure and small in occupied space of the battery.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery, a battery module and a vehicle. Background Art

[0002] In power batteries, transition metal oxides are usually coated as active materials on the positive electrode aluminum foil, while graphite materials are coated on the negative electrode copper foil. When the battery is overcharged, the positive electrode potential increases, the electrolyte is oxidized on the surface of the positive electrode active material and a large amount of gas is generated; at the same time, the transition metal oxide structure of the positive electrode is destroyed to release oxygen, which reacts violently with the carbon lithium compound of the negative electrode to generate a large amount of heat, causing thermal runaway of the battery and even causing the battery to explode.

[0003] In order to solve the safety hazard caused by overcharging of power batteries, PTC thermistors are usually set in the current flow path. When the temperature rises to the boundary that triggers the safety problem, the PTC thermistor jumps and increases, causing a short circuit at a local location, and the current cannot pass through, preventing the battery cell from further overcharging and heating. In the related art, the PTC thermistor is set in the axial direction of the pole, between the pole and the pole ear, but the setting of the PTC thermistor in the above form needs to occupy the axial space of the battery, resulting in an increase in the battery volume. Utility Model Content

[0004] The utility model aims to solve one of the technical problems in the related art at least to a certain extent.

[0005] The utility model provides a battery, in which a PTC thermistor is arranged, which can prevent a battery cell from further overcharging and heating when the battery temperature rises to a certain threshold value, and has a compact structure and occupies less battery space.

[0006] The utility model also provides a battery module.

[0007] The utility model also provides a vehicle.

[0008] The battery of the utility model embodiment includes: a battery shell, the battery shell includes a shell, a cover plate, a first pole and a second pole, the cover plate is connected to the shell and defines a battery cell cavity, the first pole and the second pole are arranged on the cover plate at intervals along a first direction, and the first direction is orthogonal to the thickness direction of the cover plate; a battery cell, the battery cell is arranged in the battery cell cavity, the battery cell has a first pole ear and a second pole ear, the first pole ear is spaced apart from the first pole column along the first direction, and the second pole ear is electrically connected to the second pole column; a PTC thermistor, the PTC thermistor is arranged in the battery cell cavity, the PTC thermistor is arranged between the first pole ear and the first pole column along the first direction, and the first pole ear is electrically connected to the first pole column through the PTC thermistor.

[0009] According to the battery of the embodiment of the utility model, since the PTC thermistor is arranged between the first pole lug and the first pole post along the first direction, the first pole lug is electrically connected to the first pole post through the PTC thermistor, and thus, under the action of the PTC thermistor, when the battery temperature rises to a certain threshold, the circuit between the first pole post and the first pole lug can be disconnected to prevent the battery cell from further overcharging and heating. In addition, since the PTC thermistor is arranged between the first pole lug and the first pole post along the first direction, compared with the solution of arranging the PTC thermistor between the first pole lug and the first pole post along the thickness direction of the cover plate, the PTC thermistor does not need to occupy the space of the height of the battery (i.e., the thickness direction of the cover plate), so that the overall structure of the battery is more compact.

[0010] Therefore, the battery of the embodiment of the utility model can prevent the battery cell from further overcharging and heating when the battery temperature rises to a certain threshold, and has a compact structure and occupies less space in the battery.

[0011] In some embodiments, on a projection plane orthogonal to a thickness direction of the cover plate, the first pole tab is disposed between the first pole and the second pole.

[0012] In some embodiments, the PTC thermistor includes a resistor body, a first conductive sheet and a second conductive sheet, the first conductive sheet and the second conductive sheet are respectively arranged on both sides of the resistor body along the first direction, the thickness of the first conductive sheet and the second conductive sheet are both less than the thickness of the resistor body, the first conductive sheet is electrically connected to the first pole, and the second conductive sheet is electrically connected to the first pole ear.

[0013] In some embodiments, the battery further includes a first connecting plate and a second connecting plate, wherein the first connecting plate is disposed between the first pole and the first conductive plate, and the second connecting plate is disposed between the second pole and the second electrode tab.

[0014] In some embodiments, a thickness of the resistor body is less than or equal to a thickness of any one of the first connecting sheet and the second connecting sheet.

[0015] In some embodiments, there are multiple battery cells, and the multiple battery cells are arranged in sequence along the second direction, the first direction, the second direction and the thickness direction of the cover plate are orthogonal to each other, and there are multiple PTC thermistors, and the second conductive sheets of the multiple PTC thermistors are respectively electrically connected to the first pole ears of the multiple battery cells, the first conductive sheets of the multiple PTC thermistors are all electrically connected to the first connecting sheet, and the second pole ears of the multiple battery cells are all electrically connected to the second connecting sheet.

[0016] In some embodiments, the first connecting sheet includes a first main body and a first branch portion, a plurality of the first branch portions are arranged at intervals along the second direction, a plurality of the first branch portions are all connected to the first main body, a plurality of the first branch portions are respectively fitted with a plurality of the first conductive sheets, and the first main body is fitted with the first pole; and / or, the second connecting sheet includes a second main body and a second branch portion, a plurality of the second branch portions are arranged at intervals along the second direction, a plurality of the second branch portions are all connected to the second main body, a plurality of the second branch portions are respectively fitted with a plurality of the second pole ears, and the second main body is fitted with the second pole.

[0017] In some embodiments, in a projection plane orthogonal to the thickness direction of the cover plate, the end faces of the first pole adjacent to the first connecting piece are both located within the outer peripheral contour of the first connecting piece and are in contact with the first connecting piece; and / or, in a projection plane orthogonal to the thickness direction of the cover plate, the end faces of the second pole adjacent to the second connecting piece are both located within the outer peripheral contour of the second connecting piece and are in contact with the second connecting piece.

[0018] A battery module according to another embodiment of the present invention comprises a battery according to any one of the embodiments of the present invention.

[0019] In the battery module of the embodiment of the utility model, since the PTC thermistor is arranged between the first pole ear and the first pole column along the first direction, the first pole ear is electrically connected to the first pole column through the PTC thermistor, under the action of the PTC thermistor, when the battery temperature rises to a certain threshold, the circuit between the first pole column and the first pole ear can be disconnected to prevent the battery cell from further overcharging and heating. In addition, since the PTC thermistor is arranged between the first pole ear and the first pole column along the first direction, compared with the solution of arranging the PTC thermistor between the first pole ear and the first pole column along the thickness direction of the cover plate, the PTC thermistor does not need to occupy the space of the height of the battery (i.e., the thickness direction of the cover plate), so that the overall structure of the battery is more compact. Therefore, the battery module of the embodiment of the utility model can prevent the battery cell from further overcharging and heating when the battery temperature rises to a certain threshold, and the structure is compact and occupies less space in the battery.

[0020] A vehicle according to another embodiment of the present invention comprises a battery module according to any one of the embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Schematic diagram of a battery according to an embodiment of the present utility model.

[0022] Figure 2 is an exploded diagram of a battery according to an embodiment of the utility model.

[0023] Figure 3 It is a schematic diagram of a battery after removing the cover plate according to an embodiment of the utility model.

[0024] Figure 4 Schematic diagram of a PTC thermistor of a battery according to an embodiment of the utility model.

[0025] Reference numerals:

[0026] 1. Battery shell; 11. Shell; 12. Cover plate; 13. First pole; 14. Second pole; 15. Cell cavity;

[0027] 2. battery cell; 21. first pole ear; 22. second pole ear;

[0028] 3. PTC thermistor; 31. first conductive sheet; 32. second conductive sheet; 33. resistor body;

[0029] 4. first connecting piece; 41. first main body; 42. first branch portion;

[0030] 5. Second connecting piece; 51. Second main body; 52. Second branch portion. DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but cannot be understood as limiting the present invention.

[0032] Refer to 1 to Figure 4 A battery, a battery module, and a vehicle according to embodiments of the present invention are described.

[0033] like Figures 1 to 4 As shown, the battery of the utility model includes a battery shell 1, a battery cell 2 and a PTC thermistor 3. The battery shell 1 includes a shell 11, a cover plate 12, a first pole 13 and a second pole 14. The cover plate 12 is connected to the shell 11 and defines a battery cell cavity 15. The first pole 13 and the second pole 14 are arranged on the cover plate 12 at intervals along a first direction, and the first direction is orthogonal to the thickness direction of the cover plate 12. The battery cell 2 is arranged in the battery cell cavity 15. The battery cell 2 has a first pole ear 21 and a second pole ear 22. The first pole ear 21 is spaced apart from the first pole 13 along the first direction, and the second pole ear 22 is electrically connected to the second pole 14. The PTC thermistor 3 is arranged in the battery cell cavity 15. The PTC thermistor 3 is arranged between the first pole ear 21 and the first pole 13 along the first direction, and the first pole ear 21 is electrically connected to the first pole 13 through the PTC thermistor 3.

[0034] like Figure 1 As shown, the thickness direction of the cover plate 12 is the vertical direction of the battery. Figure 1 The left and right direction of the battery.

[0035] It should be noted that one of the first pole lug 21 and the second pole lug 22 is a negative pole lug, and the other is a positive pole lug. That is, the polarities of the first pole lug 21 and the second pole lug 22 are opposite. In other words, the PTC thermistor 3 can be arranged between the positive pole lug and the positive pole column, or between the negative pole lug and the negative pole column.

[0036] According to the battery of the embodiment of the utility model, since the PTC thermistor 3 is arranged between the first pole lug 21 and the first pole column 13 along the first direction, the first pole lug 21 is electrically connected to the first pole column 13 through the PTC thermistor 3, so that under the action of the PTC thermistor 3, when the battery temperature rises to a certain threshold, the circuit between the first pole column 13 and the first pole lug 21 can be disconnected to prevent the battery cell 2 from further overcharging and heating. In addition, since the PTC thermistor 3 is arranged between the first pole lug 21 and the first pole column 13 along the first direction, compared with the solution of arranging the PTC thermistor 3 between the first pole lug 21 and the first pole column 13 along the thickness direction of the cover plate 12, the PTC thermistor 3 does not need to occupy the space of the height of the battery (i.e., the thickness direction of the cover plate 12), so that the overall structure of the battery is more compact.

[0037] Therefore, the battery of the embodiment of the utility model can prevent the battery cell 2 from further overcharging and heating when the battery temperature rises to a certain threshold, and has a compact structure and occupies less space in the battery.

[0038] In other words, the battery of the embodiment of the utility model staggers the first pole ear 21 and the first pole column 13 along the first direction, thereby providing an assembly space for the PTC thermistor 3, so that the PTC thermistor 3 can be laid flat on the upper end surface of the battery cell 2, thereby avoiding the axial (height direction) space occupation of the battery by the setting of the PTC thermistor 3. Compared with the solution of integrating the thermistor on the pole column or the pole ear connecting plate, the separately arranged PTC thermistor 3 can be convenient for maintenance and reduce the complexity of the battery structure design.

[0039] For example, Figure 2 and Figure 3 As shown, the first pole ear 21 is a positive pole ear, and the first pole column 13 is a positive pole column; the second pole ear 22 is a negative pole ear, and the second pole column 14 is a negative pole column. Specifically, a PTC thermistor 3 is provided between the positive pole ear and the positive pole column. When the temperature rises to the boundary that triggers a safety problem, the PTC thermistor 3 jumps and increases, causing a short circuit at a local position, and the current cannot pass, preventing the battery cell 2 from further overcharging and heating, and avoiding problems such as thermal runaway caused by excessive internal temperature of the battery.

[0040] It should be noted that the operating temperature of the PTC thermistor 3 proposed in the present application is greater than or equal to 65°. That is, when the operating temperature of the PTC thermistor 3 exceeds 65°, the circuit between the first pole 13 and the first pole ear 21 will be disconnected to prevent the battery cell 2 from further overcharging and heating, and avoid problems such as thermal runaway caused by excessive internal temperature of the battery.

[0041] Alternatively, if Figure 2 and Figure 3 As shown, on the projection plane orthogonal to the thickness direction of the cover plate 12, the first pole lug 21 is arranged between the first pole 13 and the second pole 14. It can be understood that the dimension between the first pole lug 21 and the second pole lug 22 is smaller than the dimension between the first pole 13 and the second pole 14, thereby making full use of the assembly space between the first pole 13 and the second pole 14, which is conducive to reducing the size of the battery cell 2 along the first direction and making the battery structure more compact.

[0042] Alternatively, if Figure 2 and Figure 4 As shown, the PTC thermistor 3 includes a resistor body 33, a first conductive sheet 31 and a second conductive sheet 32. The first conductive sheet 31 and the second conductive sheet 32 ​​are respectively arranged on both sides of the resistor body 33 along the first direction. The thickness of the first conductive sheet 31 and the second conductive sheet 32 ​​are both less than the thickness of the resistor body 33. The first conductive sheet 31 is electrically connected to the first pole 13, and the second conductive sheet 32 ​​is electrically connected to the first pole ear 21. It can be understood that the first pole 13 is electrically connected to the resistor body 33 through the first conductive sheet 31, the first pole ear 21 is electrically connected to the resistor body 33 through the second conductive sheet 32, and the thickness of the first conductive sheet 31 and the second conductive sheet 32 ​​are both less than the thickness of the resistor body 33, thereby reducing the space occupied by the PTC thermistor 3 in the height direction of the battery and facilitating the operator to assemble the PTC thermistor 3.

[0043] For example, Figure 2 and Figure 3 As shown, the first conductive sheet 31 is welded to the first pole 13, and the second conductive sheet 32 ​​is welded to the first pole ear 21. It can be understood that the left and right sides of the PTC thermistor 3 are respectively fixed by welding. Compared with the solution of completely fitting the entire PTC thermistor 3 to the top of the battery cell 2, the present application does not lose the original heat dissipation port and exhaust port of the battery cell 2, and does not affect the design and normal use of the explosion-proof valve of the battery.

[0044] Alternatively, if Figure 2 and Figure 3As shown, the battery further includes a first connecting piece 4 and a second connecting piece 5, the first connecting piece 4 is arranged between the first pole 13 and the first conductive piece 31, and the second connecting piece 5 is arranged between the second pole 14 and the second pole lug 22. It can be understood that the first pole 13 is electrically connected to the first conductive piece 31 through the first connecting piece 4, and the second pole 14 is electrically connected to the second conductive piece 32 through the second connecting piece 5. Since the first connecting piece 4 is arranged between the first pole 13 and the first conductive piece 31, the reliability of the electrical connection between the first pole 13 and the PTC thermistor 3 can be increased, and the flow area between the first pole 13 and the PTC thermistor 3 can be increased. Similarly, the second connecting piece 5 is arranged between the second pole 14 and the second pole lug 22, which can increase the reliability of the electrical connection between the second pole 14 and the second pole lug 22 and increase the flow area between the second pole 14 and the second pole lug 22.

[0045] In one example, the thickness of the resistor body 33 is less than or equal to the thickness of any one of the first connecting sheet 4 and the second connecting sheet 5. It can be understood that since the thickness of the resistor body 33 is less than or equal to the thickness of any one of the first connecting sheet 4 and the second connecting sheet 5, it is not necessary to increase the height dimension of the additional battery cell cavity 15 to accommodate the resistor body 33 protruding from the first connecting sheet 4 (second connecting sheet 5). That is, the assembly of the PTC thermistor 3 can be completed by using the height dimension of the original battery cell cavity 15, thereby making the battery structure more compact.

[0046] Alternatively, if Figure 2 and Figure 3 As shown, in the projection plane orthogonal to the thickness direction of the cover plate 12, the projection area of ​​the first conductive sheet 31 is larger than the projection area of ​​the second conductive sheet 32. In other words, the size of the first conductive sheet 31 is larger than the size of the second conductive sheet 32. Therefore, by increasing the size of the first conductive sheet 31, the contact area between the first conductive sheet 31 and the first connecting sheet 4 can be increased, thereby improving the fixing and converging effects of the first conductive sheet 31.

[0047] In some embodiments, Figure 2 and Figure 3 As shown, there are multiple battery cells 2, and the multiple battery cells 2 are arranged along the second direction (such as Figure 1 The first direction, the second direction and the thickness direction of the cover plate 12 are orthogonal to each other. There are multiple PTC thermistors 3. The second conductive sheets 32 of the multiple PTC thermistors 3 are electrically connected to the first pole ears 21 of the multiple battery cells 2, respectively. The first conductive sheets 31 of the multiple PTC thermistors 3 are all electrically connected to the first connecting sheet 4, and the second pole ears 22 of the multiple battery cells 2 are all electrically connected to the second connecting sheet 5.

[0048] It is understandable that one or more battery cells 2 can be accommodated in the battery cell cavity 15. In the example of the present application, two battery cells 2 can be arranged in the battery cell cavity 15, and correspondingly, there can also be two PTC thermistors 3. That is, the two PTC thermistors 3 correspond to the two battery cells 2 one by one. The two second conductive sheets 32 are electrically connected to the first pole ears 21 of the two battery cells 2, respectively, and the two first conductive sheets 31 are electrically connected to the same first connecting sheet 4. In other words, the first connecting sheet 4 can converge the current of the two first pole ears 21, thereby reducing the number of first connecting sheets 4 used. Similarly, the second connecting sheet 5 can converge the current of multiple first pole ears 21, thereby reducing the number of second connecting sheets 5 used, thereby facilitating the assembly of the battery.

[0049] Alternatively, if Figure 2 and Figure 3 As shown, the first connecting piece 4 includes a first main body 41 and a first branch 42, a plurality of first branch 42 are arranged at intervals along the second direction, the plurality of first branch 42 are connected to the first main body 41, the plurality of first branch 42 are respectively fitted with a plurality of first conductive sheets 31, and the first main body 41 is fitted with the first pole 13. In the example of the present application, there are two first branch 42, and the two first branch 42 are connected to the first main body 41. Since the two first branch 42 are arranged at intervals along the second direction, the consumables of the first connecting piece 4 can be reduced, and it is convenient for the operator to observe whether the two first branch 42 are welded in place with the two first conductive sheets 31 through the gap between the two first branch 42, so that the assembly of the first connecting piece 4 can be more convenient.

[0050] Similarly, the second connecting piece 5 includes a second main body 51 and a second branch 52, a plurality of second branch 52 are arranged at intervals along the second direction, a plurality of second branch 52 are connected to the second main body 51, a plurality of second branch 52 are respectively fitted with a plurality of second pole tabs 22, and the second main body 51 is fitted with the second pole 14. In the example of the present application, there are two second branch 52, and the two second branch 52 are connected to the second main body 51. Since the two second branch 52 are arranged at intervals along the second direction, the consumables of the second connecting piece 5 can be reduced, and it is convenient for the operator to observe whether the two first branch 42 are welded to the two second pole tabs 22 through the gap between the two second branch 52, so that the assembly of the first connecting piece 4 can be more convenient.

[0051] In some embodiments, Figure 2 and Figure 3As shown, in the projection plane orthogonal to the thickness direction of the cover plate 12, the end surface of the first pole 13 adjacent to the first connecting piece 4 is located within the outer peripheral contour of the first connecting piece 4 and is in contact with the first connecting piece 4. It can be understood that the lower end surface of the first pole 13 is in contact with the first main body 41, so that the flow area between the first connecting piece 4 and the first pole 13 can be increased, which can increase the reliability of the electrical contact between the first connecting piece 4 and the first pole 13 on the one hand; on the other hand, it can avoid the problem of overheating caused by the small flow area at the connection position of the first connecting piece 4 and the first pole 13.

[0052] Similarly, in the projection plane orthogonal to the thickness direction of the cover plate 12, the end surface of the second pole 14 adjacent to the second connecting piece 5 is located within the outer peripheral contour of the second connecting piece 5 and is in contact with the second connecting piece 5. It can be understood that the lower end surface of the second pole 14 is in contact with the second main body 51, so that the flow area between the second connecting piece 5 and the second pole 14 can be increased, which can increase the reliability of the electrical contact between the second connecting piece 5 and the second pole 14 on the one hand; on the other hand, it can avoid the problem of overheating caused by the small flow area at the connection position of the second connecting piece 5 and the second pole 14.

[0053] A battery module according to another embodiment of the present invention includes the battery of the present invention.

[0054] In the battery module of the embodiment of the utility model, since the PTC thermistor 3 is arranged between the first pole ear 21 and the first pole 13 along the first direction, the first pole ear 21 is electrically connected to the first pole 13 through the PTC thermistor 3, under the action of the PTC thermistor 3, when the battery temperature rises to a certain threshold, the circuit between the first pole 13 and the first pole ear 21 can be disconnected to prevent the battery cell 2 from further overcharging and heating. In addition, since the PTC thermistor 3 is arranged between the first pole ear 21 and the first pole 13 along the first direction, compared with the solution of arranging the PTC thermistor 3 between the first pole ear 21 and the first pole 13 along the thickness direction of the cover plate 12, the PTC thermistor 3 does not need to occupy the space of the height of the battery (i.e., the thickness direction of the cover plate 12), so that the overall structure of the battery is more compact. Therefore, the battery module of the embodiment of the utility model can prevent the battery cell 2 from further overcharging and heating when the battery temperature rises to a certain threshold, and the structure is compact and the space occupied by the battery is small.

[0055] A vehicle of another embodiment of the present invention includes a battery module of the present invention. The technical advantages of the vehicle of the embodiment of the present invention are the same as the advantages of the battery and battery module of the above embodiment, and this application will not elaborate on this.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] In the present utility model, the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0061] It should be understood that the utility model does not limit its application to the detailed structure and arrangement of the components proposed in this specification. The utility model can have other embodiments and can be implemented and executed in a variety of ways. The aforementioned deformation forms and modified forms fall within the scope of the utility model. It should be understood that the utility model and the utility model defined in this specification extend to all alternative combinations of two or more individual features mentioned or evident in the text and / or the drawings. All these different combinations constitute multiple alternative aspects of the utility model. The embodiments of this specification illustrate the best mode known for implementing the utility model and will enable those skilled in the art to utilize the utility model.

Claims

1. A battery, characterized in that: include: A battery shell (1), the battery shell (1) comprising a shell (11), a cover plate (12), a first pole (13) and a second pole (14), the cover plate (12) being connected to the shell (11) and defining a battery cell cavity (15), the first pole (13) and the second pole (14) being arranged on the cover plate (12) at intervals along a first direction, the first direction being orthogonal to a thickness direction of the cover plate (12); A battery cell (2), the battery cell (2) being arranged in the battery cell cavity (15), the battery cell (2) comprising a first pole lug (21) and a second pole lug (22), the first pole lug (21) being spaced apart from the first pole post (13) along the first direction, and the second pole lug (22) being electrically connected to the second pole post (14); A PTC thermistor (3), the PTC thermistor (3) being arranged in the battery cell cavity (15), the PTC thermistor (3) being arranged between the first pole lug (21) and the first pole column (13) along the first direction, the first pole lug (21) being electrically connected to the first pole column (13) via the PTC thermistor (3).

2. The battery according to claim 1, characterized in that On a projection plane orthogonal to the thickness direction of the cover plate (12), the first pole lug (21) is arranged between the first pole (13) and the second pole (14).

3. The battery according to claim 1, characterized in that The PTC thermistor (3) comprises a resistor body (33), a first conductive sheet (31) and a second conductive sheet (32); the first conductive sheet (31) and the second conductive sheet (32) are respectively arranged on both sides of the resistor body (33) along the first direction; the thickness of the first conductive sheet (31) and the second conductive sheet (32) are both smaller than the thickness of the resistor body (33); the first conductive sheet (31) is electrically connected to the first pole (13), and the second conductive sheet (32) is electrically connected to the first pole ear (21).

4. The battery according to claim 3, characterized in that The battery further comprises a first connecting sheet (4) and a second connecting sheet (5), wherein the first connecting sheet (4) is arranged between the first pole (13) and the first conductive sheet (31), and the second connecting sheet (5) is arranged between the second pole (14) and the second pole lug (22).

5. The battery according to claim 4, characterized in that The thickness of the resistor body (33) is less than or equal to the thickness of any one of the first connecting piece (4) and the second connecting piece (5).

6. The battery according to claim 4, characterized in that There are a plurality of battery cells (2), the plurality of battery cells (2) are arranged in sequence along a second direction, the first direction, the second direction and the thickness direction of the cover plate (12) are orthogonal to each other, there are a plurality of PTC thermistors (3), the second conductive sheets (32) of the plurality of PTC thermistors (3) are respectively electrically connected to the first pole tabs (21) of the plurality of battery cells (2), the first conductive sheets (31) of the plurality of PTC thermistors (3) are all electrically connected to the first connecting sheet (4), and the second pole tabs (22) of the plurality of battery cells (2) are all electrically connected to the second connecting sheet (5).

7. The battery according to claim 6, characterized in that The first connecting piece (4) comprises a first main body (41) and a first branch portion (42), a plurality of the first branch portions (42) are arranged at intervals along the second direction, the plurality of the first branch portions (42) are all connected to the first main body (41), the plurality of the first branch portions (42) are respectively attached to a plurality of the first conductive sheets (31), and the first main body (41) is attached to the first pole (13); And / or, the second connecting piece (5) comprises a second main body (51) and a second branch portion (52), a plurality of the second branch portions (52) are arranged at intervals along the second direction, the plurality of the second branch portions (52) are all connected to the second main body (51), the plurality of the second branch portions (52) are respectively fitted with a plurality of the second pole ears (22), and the second main body (51) is fitted with the second pole (14).

8. The battery according to claim 4, characterized in that In a projection plane orthogonal to the thickness direction of the cover plate (12), the end surface of the first pole (13) adjacent to the first connecting piece (4) is located within the outer peripheral contour of the first connecting piece (4) and is in contact with the first connecting piece (4); And / or, in a projection plane orthogonal to the thickness direction of the cover plate (12), the end faces of the second pole (14) adjacent to the second connecting piece (5) are both located within the outer peripheral contour of the second connecting piece (5) and are in contact with the second connecting piece (5).

9. A battery module, characterized in that: A battery comprising the battery according to any one of claims 1 to 8.

10. A vehicle, characterized in that: Comprising the battery module as claimed in claim 9.

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