Adapter piece and battery

Abstract

The utility model relates to the technical field of batteries, and discloses an adapter piece and a battery. In the switching piece, the overcurrent part is arranged between the pole switching part and the tab switching part, so that the pole switching part and the tab switching part are conducted and current can be transmitted, and the current is dispersed and flows by additionally arranging the diversion trench at the overcurrent part and / or the tab switching part, so that the uniformity of current distribution on the switching piece is improved; therefore, the phenomenon of local over-current temperature rise of the switching piece is avoided, the over-current capability of the switching piece is improved, and meanwhile, the weight of the switching piece can be reduced by forming the diversion trench in the switching piece, so that the energy density of the battery cell is improved.

Description

Technical Field

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

[0002] Batteries are usually composed of cells, cover plates, and shells. The cells are used to store electrical energy, and the cover plates are provided with positive and negative poles that can be connected to external devices. Usually, the cells are provided with positive and negative pole ear structures, and adapters are required as intermediate connectors to connect the positive and negative pole ears on the cells with the positive and negative poles on the cover plates to achieve electrical energy transmission.

[0003] As the energy of battery cells increases, the requirements for the current carrying capacity of structural parts are getting higher and higher, especially for adapters. In conventional solutions, the cross-sectional area of ​​the adapter is usually increased to improve the current carrying capacity of the adapter. However, such a setting will increase the weight of the adapter, thereby reducing the energy density of the battery cell. Utility Model Content

[0004] In view of this, the utility model provides an adapter and a battery to solve the problem that in conventional solutions, when increasing the cross-sectional area of ​​the adapter to improve the current capacity, the energy density of the battery cell will be reduced.

[0005] In the first aspect, the utility model provides a switching plate, comprising a pole switching portion, a tab switching portion and a current-passing portion. Specifically, the tab switching portion is arranged at intervals from the pole switching portion; the current-passing portion is arranged between the pole switching portion and the tab switching portion, and the current-passing portion conducts the pole switching portion and the tab switching portion; wherein the switching plate is further provided with a flow-guiding groove group arranged in the current-passing portion and / or the tab switching portion.

[0006] By using an overcurrent portion disposed between the pole transition portion and the pole tab transition portion, the pole transition portion and the pole tab transition portion are made conductive and can transmit current, and by adding a guide groove at the overcurrent portion and / or the pole tab transition portion, the current is dispersed and flows, thereby improving the uniformity of current distribution on the adapter, thereby avoiding the phenomenon of local overcurrent temperature rise on the adapter, and improving the overcurrent capacity of the adapter. At the same time, by opening a guide groove on the adapter, the weight of the adapter can be reduced, thereby improving the energy density of the battery cell.

[0007] In an optional embodiment, the guide groove group includes a first guide groove group, the first guide groove group is opened in the current passing portion, the first guide groove group includes at least one first guide groove, one end of any first guide groove is arranged close to the pole ear transition portion, and the other end of any first guide groove extends toward the pole transition portion.

[0008] By providing a first guide groove group in the overcurrent portion, it is convenient to divert the current at the overcurrent portion. Since the first guide groove group is provided in the overcurrent portion, the cross-sectional area of ​​a part of the overcurrent portion is reduced, that is, the local area of ​​the overcurrent portion becomes thinner. When a strong current exists in a short circuit, it is easier to fuse to cut off the path current and ensure the safety of the battery cell. At the same time, by etching the first guide groove on the adapter sheet, the weight of the adapter sheet can be reduced and the energy density of the battery cell can be improved.

[0009] In an optional embodiment, the guide groove group also includes a second guide groove group, and the second guide groove group includes at least one second guide groove; the pole lug transition portion is provided with a plurality of pole lug connection areas, the plurality of pole lug connection areas are arranged at intervals, and a second guide groove is provided between at least two adjacent pole lug connection areas.

[0010] By providing a pole lug connection area at the pole lug transition part, after the pole lug and the pole lug transition part are welded, the adapter plate and the pole lug can be conductively connected. By providing the pole lug transition part with multiple pole lug connection areas, the adapter plate can be connected to the pole lugs of multiple battery cells at the same time, that is, multiple battery cells can be conductively connected to the adapter plate at the same time. By providing a second guide groove between at least two adjacent pole lug connection areas, on the one hand, current diversion can be achieved at the pole lug transition part, and on the other hand, the weight of the adapter plate can be further reduced, thereby further improving the energy density of the battery cell.

[0011] In an optional embodiment, in a direction extending from the current passing portion to the pole tab transition portion, a gap is left between the second guide groove and the first guide groove, or the second guide groove is connected to one of the first guide grooves.

[0012] In an optional embodiment, there are more than two first guide grooves, and the more than two first guide grooves are arranged at intervals along the width direction of the adapter plate.

[0013] In an optional embodiment, the current passing portion is provided with at least two extension ends away from the pole transition portion, and any extension end is connected to one of the pole lug transition portions.

[0014] In an optional embodiment, at least two of the pole tab transition portions are arranged on the same side of the pole post transition portion and are spaced apart so that the transition piece as a whole presents a bent structure.

[0015] By arranging at least two pole lug transition parts on the same side of the pole post transition part, since each pole lug transition part is connected to an extension end, the two pole lug transition parts and the current passing part present a bent structure as a whole, which is convenient for using the adapter to connect the pole lugs of at least two battery cells at the same time and to stack the battery cells, thereby reducing the number of adapters and improving the integration of the battery.

[0016] In an optional embodiment, the distribution density of the first guide grooves arranged on one side of each extension end along the width direction of the adapter plate is the same as or different from the distribution density of the first guide grooves arranged on the other side of the extension end along the width direction of the adapter plate.

[0017] In an optional implementation, the groove depth of the first guide groove and the groove depth of the second guide groove are both smaller than the thickness of the adapter plate.

[0018] By making the groove depth of the first guide groove and the groove depth of the second guide groove smaller than the thickness of the adapter sheet, since each guide groove obtained after etching has an inner end face and an inner bottom end face, the heat dissipation path will be extended, thereby increasing the heat dissipation area, thereby improving the heat dissipation effect. At the same time, by etching the guide groove on the adapter sheet, the weight of the adapter sheet is reduced, thereby improving the energy density of the battery cell.

[0019] In the second aspect, the utility model also provides a battery, including a shell, at least one battery cell and a transfer plate. Specifically, the shell is provided with a receiving cavity with at least one side being an opening; the battery cell is placed in the receiving cavity, and the battery cell is provided with a positive pole ear and a negative pole ear; the transfer plate is arranged near the opening, and two transfer plates are provided, and the two transfer plates are respectively welded to the positive pole ear and the negative pole ear, so that the pole transfer parts of the two transfer plates serve as the positive pole column and the negative pole column respectively. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the specific implementation modes of the present invention, the drawings required for use in the description of the specific implementation modes will be briefly introduced below. Obviously, the drawings described below are some implementation modes of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 The adapter provided for the embodiment of the utility model is a structural schematic diagram of the first implementation mode;

[0022] Figure 2 A schematic diagram of current dispersion of the adapter provided in an embodiment of the utility model;

[0023] Figure 3 The adapter provided for the embodiment of the utility model is a structural schematic diagram of the second implementation mode;

[0024] Figure 4 The adapter provided in the embodiment of the utility model is a schematic structural diagram of a third implementation mode;

[0025] Figure 5 The adapter provided for the embodiment of the utility model is a schematic structural diagram of a fourth implementation mode;

[0026] Figure 6 The adapter provided for the embodiment of the utility model is a structural schematic diagram of the fifth implementation mode;

[0027] Figure 7 The adapter provided for the embodiment of the utility model is a structural schematic diagram of a sixth implementation mode;

[0028] Figure 8 A schematic diagram of a partial structure of a battery provided in an embodiment of the utility model;

[0029] Description of reference numerals:

[0030] 1. adapter plate; 11. pole adapter portion; 12. pole ear adapter portion; 121. pole ear connection area; 13. current passing portion; 14. guide groove group; 141. first guide groove; 142. second guide groove;

[0031] 2. Battery cell. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0033] In the description of the present application, it should be understood that the terms "upper", "inner", "outer", "horizontal", "vertical", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to 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 application.

[0034] 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0035] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] See also Figures 1 to 8 , Figure 1 The schematic diagram of the structure of the adapter provided in the embodiment of the present application is a first embodiment. Figure 1 The area indicated by the dotted line box is part of the flow area; Figure 2 A schematic diagram showing current dispersion of a switching plate provided in an embodiment of the present application is shown; Figure 3 The adapter provided in the embodiment of the present application is a schematic structural diagram of a second implementation mode; Figure 4 The schematic diagram of the structure of the adapter provided in the embodiment of the present application is a third implementation mode; Figure 5 The schematic diagram of the structure of the adapter provided in the embodiment of the present application is a fourth implementation mode; Figure 6 The adapter provided in the embodiment provided in this application is a schematic structural diagram of a fifth implementation mode; Figure 7 The adapter provided in the embodiment of the present application is a schematic structural diagram of a sixth implementation mode; Figure 8 A partial structural schematic diagram of a battery provided in an embodiment of the present application is shown.

[0037] Combine the following Figures 1 to 8 , describing an embodiment of the present application.

[0038] In a first aspect, an embodiment of the present application provides a transfer sheet 1, such as Figures 1 to 8 As shown, the adapter sheet 1 includes a pole adapter portion 11, a tab adapter portion 12 and a current-passing portion 13. Specifically, the tab adapter portion 12 is arranged at intervals from the pole adapter portion 11; the current-passing portion 13 is arranged between the pole adapter portion 11 and the tab adapter portion 12, and the current-passing portion 13 conducts the pole adapter portion 11 and the tab adapter portion 12; wherein, the adapter sheet 1 is further provided with a guide groove group 14 arranged in the current-passing portion 13 and / or the tab adapter portion 12.

[0039] By using the adapter 1 of the present embodiment, the overcurrent portion 13 is arranged between the pole adapter portion 11 and the pole tab adapter portion 12, so that the pole adapter portion 11 and the pole tab adapter portion 12 are conductive and can transmit current. Since for the adapter structure of equal thickness, the current usually tends to flow through the area with the shortest path (that is, the corresponding resistance is the smallest), which leads to the concentration of the current flow area, resulting in local overcurrent temperature rise. The present application adds a guide groove at the overcurrent portion 13 and / or the pole tab adapter portion 12. Since the setting of the guide groove will reduce the cross-sectional area, its local resistance will increase, thereby changing the flow direction of the current, making the current flow in a dispersed manner, and improving the uniformity of the current distribution on the adapter 1, thereby avoiding the occurrence of local overcurrent temperature rise on the adapter 1, thereby improving the overcurrent capacity of the adapter 1. At the same time, by opening a guide groove on the adapter 1, the weight of the adapter 1 can be reduced, thereby improving the energy density of the battery cell 2. It is particularly noted that the pole adapter portion 11 can be a portion on the adapter plate used to connect to the pole, or can be a adapter plate pole arranged on the adapter plate. These are conventional designs and are not limited in this application.

[0040] In an embodiment of the present application, the guide groove group 14 includes a first guide groove group, which is opened on the current passing portion 13. The first guide groove group includes at least one first guide groove 141. One end of any first guide groove 141 is arranged close to the pole ear adapter portion 12, and the other end of any first guide groove 141 extends toward the pole adapter portion 11.

[0041] By utilizing the adapter sheet 1 of the present embodiment, a first guide groove group is provided in the overcurrent portion 13, so that the current can be easily diverted at the overcurrent portion 13. Since the first guide groove group is provided in the overcurrent portion 13, the cross-sectional area of ​​a part of the overcurrent portion 13 is reduced, that is, the local area of ​​the overcurrent portion 13 becomes thinner, so that when a strong current exists in a short circuit, it is easier to fuse to cut off the path current, thereby ensuring the safety of the battery cell 2. At the same time, by etching the first guide groove 141 on the adapter sheet 1, the weight of the adapter sheet 1 can be reduced and the energy density of the battery cell 2 can be improved.

[0042] In the embodiment of the present application, the guide groove group 14 also includes a second guide groove group, and the second guide groove group includes at least one second guide groove 142; the pole lug transition portion 12 is provided with a plurality of pole lug connection areas 121, and the plurality of pole lug connection areas 121 are arranged at intervals, and a second guide groove 142 is provided between at least two adjacent pole lug connection areas 121.

[0043] By utilizing the adapter sheet 1 of the present embodiment, by providing a pole lug connection area 121 on the pole lug adapter portion 12, after the pole lug and the pole lug adapter portion 12 are welded, the adapter sheet 1 and the pole lug can be conductively connected, and by providing the pole lug adapter portion 12 with multiple pole lug connection areas 121, the adapter sheet 1 can be connected to the pole lugs of multiple battery cells 2 at the same time, that is, multiple battery cells 2 can be conductively connected to the adapter sheet 1 at the same time, and by providing a second guide groove 142 between at least two adjacent pole lug connection areas 121, on the one hand, current diversion can be achieved in the pole lug adapter portion 12, and on the other hand, the weight of the adapter sheet 1 can be further reduced, thereby further improving the energy density of the battery cell 2.

[0044] It can be explained that the adapter sheet 1 provided in the present application does not specifically limit the arrangement of the second guide grooves 142. One or more second guide grooves 142 can be etched between any tab connection area 121 and the adjacent tab connection area 121; or the second guide grooves 142 can be etched between a portion of the tab connection areas 121, leaving the other portion of the tab connection areas 121 vacant.

[0045] It can be explained that, in the embodiment of the present application, two or more tab connection areas are provided on the tab adapter 12, which are used to simultaneously connect the tabs of two or more battery cells. Of course, in other optional embodiments, the tab adapter 12 can also have only one tab connection area.

[0046] In the embodiment of the present application, in the direction extending from the flow-through portion 13 to the tab transition portion 12 , a gap is left between the second guide groove 142 and the first guide groove 141 , or the second guide groove 142 is connected to one of the first guide grooves 141 .

[0047] For example, Figure 1 As shown, in the first embodiment, a gap is left between the second guide groove 142 and the first guide groove 141. Figure 3 As shown, in the second embodiment, the second guide groove 142 is connected to the first guide groove 141. By connecting the second guide groove 142 to one of the first guide grooves 141, it is possible to avoid current flowing through the gap between the second guide groove 142 and the first guide groove 141, thereby achieving a better diversion effect.

[0048] In the embodiment of the present application, in order to further improve the flow capacity of the flow portion 13, as shown in FIG. Figure 4 As shown, the first guide groove 141 is thickened; or as Figure 5 As shown, the number of the first guide grooves 141 is increased.

[0049] It should be noted that in the above embodiments, the number of the first diversion grooves 141 is not specifically limited. Preferably, there are two or more first diversion grooves 141, and the two or more first diversion grooves 141 are arranged at intervals along the width direction of the adapter piece 1.

[0050] It should be noted that the width direction mentioned above is Figure 1 the vertical direction in

[0051] In the embodiment of the present application, the current-carrying part 13 has at least two extension ends far away from the pole-column adapter part 11, and any one of the extension ends is connected to a pole-tab adapter part 12.

[0052] It should be noted that in the above embodiments, the number of the extension ends of the adapter piece 1 is not specifically limited. It can be one, two or more, and is used to conduct the adapter piece 1 with the pole tabs. Preferably, there are at least two extension ends, that is, two or more.

[0053] Similarly, when there are two or more extension ends, the positional relationship between the extension ends is not specifically limited. Preferably, at least two pole-tab adapter parts 12 are arranged on the same side of the pole-column adapter part 11 and at intervals, so that the whole adapter piece 1 presents a bent structure.

[0054] By using the adapter piece 1 of this embodiment, by arranging at least two pole-tab adapter parts 12 on the same side of the pole-column adapter part 11, since each pole-tab adapter part 12 is connected to an extension end, the two pole-tab adapter parts 12 and the current-carrying part 13 as a whole present a bent structure, which is convenient for using the adapter piece 1 to connect with the pole tabs of at least two battery cells 2 at the same time, and enabling the battery cells 2 to be stacked, which is convenient for reducing the number of adapter pieces 1 and improving the integration degree of the battery at the same time.

[0055] Furthermore, in the horizontal direction and / or the vertical direction, two adjacent extension ends are arranged in parallel or are offset. For example, as Figures 1 to 7 shown, two adjacent extension ends are arranged at intervals in the vertical direction, and a bent structure, such as a "U"-shaped bend, a "匚"-shaped bend, a "V"-shaped bend, etc., is arranged between the two extension ends, so that the whole adapter piece 1 presents a "U"-shaped bend, a "匚"-shaped bend, a "V"-shaped bend form. It should be noted that fillet processing can be performed at the bend. Again, for example, two adjacent extension ends are collinear, so that the whole adapter piece 1 presents a "one"-shaped form.

[0056] Furthermore, the distribution density of the first diversion grooves 141 arranged on one side of each extension end along the width direction of the adapter piece 1 is the same as or different from the distribution density of the first diversion grooves 141 arranged on the other side of the extension end along the width direction of the adapter piece 1. For example, as Figure 1 、 Figure 3, Figure 4 and Figure 5 As shown, the distribution density of the first guide grooves 141 on both sides of the extension end along the width direction of the adapter sheet 1 is the same; for example, Figure 6 As shown, the distribution density of the first guide grooves 141 arranged on the inner side of the extension end along the width direction of the adapter sheet 1 is greater than the distribution density of the first guide grooves 141 arranged on the outer side; as another example, Figure 7 As shown, the distribution density of the first guide grooves 141 arranged on the inner side of the extension end along the width direction of the adapter plate 1 is smaller than the distribution density of the first guide grooves 141 arranged on the outer side.

[0057] The design of the distribution density of the first guide groove 141 on the extension end can be specifically selected according to the current flowing through the two sides of the pole ear transition part 12. If the pole ears connected on both sides of the pole ear transition part 12 are the same and the current flowing through is the same, the same distribution density is used. If the pole ears connected on both sides are different and the current flowing through is different, different distribution densities are used.

[0058] It can be explained that the width direction mentioned above is Figures 1 to 7 Vertical orientation shown.

[0059] It should be noted that the above-mentioned different configurations of the first guide groove group can be used in combination or individually without specific limitation. Figures 1 to 7 Only some of the settings are shown. When using it, you can choose according to your actual needs.

[0060] It can be explained that the groove depth of the first guide groove 141 and the groove depth of the second guide groove 142 are both smaller than the thickness of the adapter sheet 1 .

[0061] By utilizing the adapter sheet 1 of the present embodiment, by making the groove depth of the first guide groove 141 and the groove depth of the second guide groove 142 smaller than the thickness of the adapter sheet 1, since each guide groove obtained after etching has an inner end face and an inner bottom end face, the heat dissipation path will be extended, thereby increasing the heat dissipation area, thereby improving the heat dissipation effect. At the same time, by etching the guide groove on the adapter sheet 1, the weight of the adapter sheet 1 is reduced, and the energy density of the battery cell 2 is increased.

[0062] In a second aspect, the utility model also provides a battery, such as Figure 8As shown, the battery includes a shell, at least one battery cell 2 and the adapter 1 mentioned in the first aspect. Specifically, a housing cavity with at least one side being open is provided inside the shell; the battery cell 2 is placed in the housing cavity, and the battery cell 2 is provided with a positive pole ear and a negative pole ear; there are two adapters 1, and the two adapters 1 are respectively a positive adapter and a negative adapter, and the pole ear adapter portion of the positive adapter is connected to the positive pole ear, and the pole ear adapter portion of the negative adapter is connected to the negative pole ear. During installation, adapters 1 with different structures are used flexibly so that the installed battery has the advantages of small size and high integration.

[0063] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A transfer sheet, characterized in that: include: A pole adapter (11); A pole lug transition portion (12), wherein the pole lug transition portion (12) and the pole column transition portion (11) are arranged at intervals; A current-passing portion (13), the current-passing portion (13) being arranged between the pole transition portion (11) and the pole tab transition portion (12), and the current-passing portion (13) conducts the pole transition portion (11) and the pole tab transition portion (12); The adapter plate (1) is further provided with a flow guide groove group (14) arranged on the current passing portion (13) and / or the tab adapter portion (12).

2. The adapter according to claim 1, characterized in that: The guide groove group (14) comprises a first guide groove group, the first guide groove group is arranged on the current passing portion (13), the first guide groove group comprises at least one first guide groove (141), one end of any first guide groove (141) is arranged close to the pole lug transition portion (12), and the other end of any first guide groove (141) extends toward the pole column transition portion (11).

3. The adapter according to claim 2, characterized in that: The guide groove group (14) further includes a second guide groove group, wherein the second guide groove group includes at least one second guide groove (142); The pole lug transition portion (12) is provided with a plurality of pole lug connection areas (121), the plurality of pole lug connection areas (121) are arranged at intervals, and a second guide groove (142) is provided between at least two adjacent pole lug connection areas (121).

4. The adapter according to claim 3, characterized in that: In the direction extending from the flow-through portion (13) to the tab transition portion (12), a gap is left between the second guide groove (142) and the first guide groove (141), or the second guide groove (142) is connected to one of the first guide grooves (141).

5. The adapter according to claim 3, characterized in that: There are more than two first guide grooves (141), and the more than two first guide grooves (141) are arranged at intervals along the width direction of the adapter plate (1).

6. The adapter according to any one of claims 2 to 5, characterized in that: The current passing portion (13) is provided with at least two extension ends away from the pole transition portion (11), and any extension end is connected to one of the pole lug transition portions (12).

7. The adapter according to claim 6, characterized in that: At least two of the pole lug transition portions (12) are arranged on the same side of the pole post transition portion (11) and are arranged at intervals, so that the transition piece (1) presents a bent structure as a whole.

8. The adapter according to claim 6, characterized in that: The distribution density of the first guide grooves (141) arranged on one side of each of the extension ends along the width direction of the adapter plate (1) is the same as or different from the distribution density of the first guide grooves (141) arranged on the other side of the extension ends along the width direction of the adapter plate (1).

9. The adapter according to any one of claims 3 to 5, characterized in that: The groove depth of the first guide groove (141) and the groove depth of the second guide groove (142) are both less than the thickness of the adapter plate (1).

10. A battery, characterized in that: include: A housing, wherein a receiving cavity having at least one side being open is provided inside the housing; At least one battery cell (2), the battery cell (2) being placed in the accommodation cavity, the battery cell (2) being provided with a positive electrode ear and a negative electrode ear; An adapter sheet (1) is an adapter sheet (1) as described in any one of claims 1 to 9, wherein the adapter sheet (1) is arranged near the opening, and two adapter sheets (1) are provided, and the two adapter sheets (1) are respectively a positive electrode adapter sheet and a negative electrode adapter sheet, wherein the tab adapter portion of the positive electrode adapter sheet is connected to the positive tab, and the tab adapter portion of the negative electrode adapter sheet is connected to the negative tab.

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