Connecting piece, battery pack and electric equipment

Abstract

The utility model discloses a connecting piece, a battery pack and electric equipment, the connecting piece comprises an electrode connecting part and a cold plate connecting part, and the electrode connecting part is suitable for being electrically connected with an electrode output end of a battery cell; the cold plate connecting part is in heat conduction connection with the electrode connecting part, and the cold plate connecting part is suitable for being in contact with a cold plate outside the battery cell. According to the technical scheme provided by the invention, the temperature of the electrode output end can be reduced, so that the electricity utilization safety of the battery is improved.

Description

Technical Field

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

[0002] High-rate charging current will cause the polarization internal resistance of the battery pack to increase, the battery pole position will heat up seriously, the temperature rise is high, and high-rate charging cannot be maintained for a long time. In extreme cases, it will cause irreversible damage to the battery.

[0003] In the prior art, a cold plate is usually set on the surface of the battery pack to cool it down. However, it can only reduce the temperature of the battery surface and cannot transfer the heat at the pole in time, causing the pole to always be in an overheated state, resulting in poor temperature consistency of the battery cell and high battery safety risks. Utility Model Content

[0004] In order to solve the above problems, the purpose of the embodiments of the present application is to provide a connector, a battery pack and an electrical device.

[0005] According to a first aspect of an embodiment of the present application, a connecting member is provided, the connecting member comprising an electrode connecting portion and a cold plate connecting portion;

[0006] The electrode connecting portion is suitable for electrically connecting to the electrode output end of the battery cell;

[0007] The cold plate connecting portion is thermally connected to the electrode connecting portion, and the cold plate connecting portion is suitable for contacting a cold plate outside the battery cell.

[0008] Optionally, the connecting member includes:

[0009] a first connecting piece, wherein the cold plate connecting portion is located on the first connecting piece;

[0010] A second connecting sheet, wherein the second connecting sheet is connected to the first connecting sheet, and the electrode connecting portion is located on the second connecting sheet.

[0011] Optionally, the first connecting piece and the second connecting piece form an angle.

[0012] Optionally, the connecting member includes a plurality of second connecting pieces, and the plurality of second connecting pieces are arranged at intervals along a length direction of the first connecting piece.

[0013] Optionally, the second connecting piece includes a second sub-connecting piece and a first sub-connecting piece, the first sub-connecting piece is connected to the end or middle of the second sub-connecting piece, the first sub-connecting piece is connected to the first connecting piece, and the electrode connecting portion is located on the second sub-connecting piece.

[0014] Optionally, the first sub-connecting piece includes a bending portion, and the bending portion forms an escape zone.

[0015] Optionally, the first sub-connecting sheet is provided with a first insulating layer, and / or the first connecting sheet is provided with a second insulating layer.

[0016] Optionally, the connecting member further comprises a sampling connecting portion, and the sampling connecting portion is electrically connected to the electrode connecting portion.

[0017] Optionally, the sampling connection portion is located on the first connection piece or the second connection piece.

[0018] Optionally, the connecting member includes a cooling block, the cooling block includes a first end face and a second end face, the first end face is arranged opposite to the second end face, a groove is arranged on the first end face, the electrode connecting part is adapted to the shape of the groove, and the cold plate connecting part is located on the second end face.

[0019] Optionally, the cooling block includes a third end surface, and the third end surface is connected to the first end surface and the second end surface respectively;

[0020] The connecting member further includes a first extension plate having a fifth end surface intersecting with the third end surface.

[0021] Optionally, the cooling block includes a fourth end surface, and the fourth end surface is arranged opposite to the third end surface;

[0022] The connecting member further includes a second extension plate having a sixth end surface intersecting with the fourth end surface.

[0023] Optionally, a third insulating layer is provided on the outer surface of the connecting member.

[0024] Optionally, the cooling block is provided with at least one through hole, and the through hole is used to increase the heat conduction area of ​​the cooling block.

[0025] Optionally, a heat dissipation pipe is provided inside the cooling block.

[0026] Optionally, the connecting piece is made of metal.

[0027] According to a second aspect of an embodiment of the present application, a battery pack is provided, comprising:

[0028] A battery cell monomer, wherein the battery cell monomer comprises an electrode output end;

[0029] Cold plate;

[0030] In the above-mentioned connecting member, the electrode connecting portion is electrically connected to the electrode output end, and the cold plate connecting portion is in contact with the cold plate.

[0031] Optionally, the battery pack includes a plurality of the battery cells, the plurality of the battery cells are arranged at intervals along the length direction of the battery pack, and the connecting member is arranged between two adjacent battery cells.

[0032] Optionally, the cold plate is disposed on one side of the battery cell, and the first extension plate of the connector is sandwiched between the battery cell and the cold plate.

[0033] Optionally, the cold plate is arranged on one side of the battery cell, the first extension plate of the connector is clamped between one of the two adjacent battery cells and the cold plate, and the second extension plate of the connector is clamped between the other of the two adjacent battery cells and the cold plate.

[0034] According to a third aspect of an embodiment of the present application, there is provided an electrical device comprising the above-mentioned battery pack.

[0035] One technical effect of the embodiments of the present application is that the connector can play a heat-conducting role and can transfer the heat of the electrode output end of the battery cell to the cold plate, thereby reducing the temperature of the electrode output end to improve the power safety of the battery.

[0036] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0038] Figure 1 This is a schematic diagram of the structure of a connecting member in one embodiment of the present application;

[0039] Figure 2 This is a structural schematic diagram of the connection between the connecting member, the cold plate and the electrode connecting sheet in one embodiment of the present application;

[0040] Figure 3 This is a structural schematic diagram of the connection between the connecting member, the cold plate and the electrode connecting sheet in one embodiment of the present application;

[0041] Figure 4 This is a structural schematic diagram of a connecting member in another embodiment of the present application;

[0042] Figure 5 This is a structural schematic diagram of the connection between the connector, the cold plate and the electrode connecting sheet in another embodiment of the present application;

[0043] Figure 6This is a structural schematic diagram of the connection between the connector, the cold plate and the electrode connecting sheet in another embodiment of the present application;

[0044] Figure 7 This is a structural schematic diagram of the connection between the connector, the cold plate and the electrode connecting sheet in another embodiment of the present application;

[0045] Figure 8 This is a structural schematic diagram of the connection between the connector, the cold plate and the electrode connecting piece in another embodiment of the present application.

[0046] Explanation of the reference numerals: connector 100; first connector 11; second connector 12; second sub-connector 121; first sub-connector 122; first bending portion 1221; second bending portion 1222; third bending portion 1223; first avoidance zone 13; second avoidance zone 14; cooling block 21; first end face 211; second end face 212; third end face 213; fourth end face 214; groove 215; through hole 216; first extension plate 22; fifth end face 221; second extension plate 23; sixth end face 231; heat dissipation pipe 24; electrode connector 200; battery cell 300; electrode output end 301; cold plate 400. DETAILED DESCRIPTION

[0047] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0048] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0049] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0050] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0051] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0052] First of all, Figure 1 The width direction, height direction and length direction marked therein are the width direction, height direction and length direction of the connecting member 100; the length direction of the connecting member is the same as the length direction of the first connecting piece; Figure 2 and Figure 3 The width direction, height direction and length direction marked therein are the width direction, height direction and length direction of the battery cell.

[0053] like Figure 1-Figure 8 As shown, according to the first aspect of an embodiment of the present application, a connector 100 is provided, the connector 100 includes an electrode connecting portion and a cold plate connecting portion; the electrode connecting portion is suitable for electrically connecting the electrode output end 301 of the battery cell 300; the cold plate connecting portion is thermally connected to the electrode connecting portion, and the cold plate connecting portion is suitable for contacting a cold plate 400 outside the battery cell 300.

[0054] The connector 100 provided in the embodiment of the present application is suitable for a battery pack. The electrode connector is used to contact and electrically connect with the electrode output terminal 301, and the cold plate connector is used to connect with the cold plate 400. The connector 100 can conduct the heat of the electrode output terminal 301 to the cold plate 400, thereby reducing the temperature of the electrode output terminal 301 to improve the power safety of the battery.

[0055] An electrode connecting sheet 200 is provided at the electrode output end 301, and the electrode connecting sheet 200 is used to connect the poles of two adjacent battery cells 300. The connector 100 includes an electrode connecting portion and a cold plate connecting portion. The electrode connecting portion is used to be in thermal contact with the electrode connecting sheet 200, and the electrode connecting portion is electrically connected to the electrode connecting sheet 200; the cold plate connecting portion is connected to the cold plate 400. The heat of the electrode connecting sheet 200 can be transferred to the cold plate 400 through the connector 100, thereby dissipating the heat of the electrode output end 301 to improve the power safety of the battery.

[0056] Further explanation, the connector 100 is made of conductive and heat-conductive material and is integrally formed. The connector 100 includes an electrode connecting portion and a cold plate connecting portion, and the electrode connecting portion is thermally connected to the cold plate connecting portion. In an optional embodiment, since the cold plate connecting portion is used to connect to the cold plate 400, a second insulating layer is provided at the cold plate connecting portion to avoid conductive connection between the connector 100 and the cold plate 400, so that the connector 100 and the cold plate 400 are in an insulating relationship, thereby reducing the risk of arcing. In another embodiment, the cold plate connecting portion is connected to the cold plate 400, and an insulating thermally conductive adhesive is applied between the cold plate connecting portion and the cold plate 400, which can not only improve the thermal conductivity effect, but also form an insulating relationship between the connector 100 and the cold plate 400, thereby reducing the risk of arcing.

[0057] In an alternative embodiment, Figure 1-Figure 3As shown, the connector 100 includes a first connecting piece 11 and a second connecting piece 12 , the cold plate connecting portion is located at the first connecting piece 11 ; the second connecting piece 12 is connected to the first connecting piece 11 , and the electrode connecting portion is located at the second connecting piece 12 .

[0058] Further description, the connector 100 includes a first connecting piece 11 and a second connecting piece 12; the electrode connecting portion is located at the second connecting piece 12, and the second connecting piece 12 is used to connect with the electrode connecting piece 200, and the cold plate connecting portion is located at the first connecting piece 11, and the first connecting piece 11 is used to connect with the cold plate 400.

[0059] In an optional embodiment, the first connecting piece 11 and the second connecting piece 12 form an angle. The cold plate 400 and the electrode output end 301 are located on different end surfaces of the battery cell 300, so the first connecting piece 11 and the second connecting piece 12 form an angle, which facilitates the connection of the first connecting piece 11 to the cold plate and the second connecting piece 12 to the electrode output end 301. When the battery pack has multiple battery cells 300, the multiple battery cells 300 are arranged adjacent to each other, and the second connecting piece 12 can be located between two adjacent battery cells 300, which can save the internal space of the battery pack.

[0060] In an optional implementation, the connecting member 100 includes a plurality of second connecting pieces 12 , and the plurality of second connecting pieces 12 are arranged at intervals along the length direction of the first connecting piece 11 .

[0061] In a specific embodiment, a plurality of battery cells 300 in a battery pack are arranged in sequence along the width direction of the battery cell cells 300, that is, a plurality of battery cell cells 300 are stacked; a cold plate 400 is arranged on one side in the height direction of the battery cell cells 300, and the cold plate 400 may be arranged on one side in the height direction of the battery cell cells 300, or on both sides, and the cold plate 400 extends along the width direction of the battery cell cells 300, so that the cold plate 400 can cover each battery cell 300 to dissipate heat for each battery cell 300 in the battery pack; the battery cell 300 includes a positive electrode column and a negative electrode column, and the positive electrode column and the negative electrode column may be arranged on the same side, or on both sides in the length direction of the battery cell cells 300, and an electrode connecting sheet 200 connects the electrodes of two adjacent battery cell cells 300 to connect a plurality of battery cell cells 300 in series or in parallel.

[0062] Therefore, the electrode connecting sheet 200 is located on one or both sides of the length direction of the battery cell 300 , and the cold plate 400 is located on one or both sides of the height direction of the battery cell 300 . Therefore, the cold plate 400 and the electrode connecting sheet 200 are located in two directions.

[0063] like Figure 1 and Figure 3 As shown, the connector 100 includes a first connecting piece 11 and multiple second connecting pieces 12. The first connecting piece 11 is used to connect to the cold plate 400, and the second connecting piece 12 is used to connect to the electrode connecting piece 200. Since multiple electrode connecting pieces 200 are usually provided in the battery pack, one second connecting piece 12 is connected to one electrode connecting piece 200.

[0064] Among them, the cold plate connecting part is located on the first connecting piece 11, the first connecting piece 11 includes a first surface and a second surface, the first surface and the second surface are arranged opposite to each other, and the first surface is bonded to the surface of the cold plate 400 by thermal conductive adhesive, thereby increasing the contact area between the first connecting piece 11 and the cold plate 400, and also improving the heat dissipation effect of the connecting piece 100.

[0065] A plurality of second connecting sheets 12 are arranged at intervals along the length direction of the first connecting sheet 11, and there is a gap between two adjacent second connecting sheets 12, which can avoid some components inside the battery pack and reduce the weight of the connector 100. The end of the second connecting sheet 12 is connected to the first connecting sheet 11, and the electrode connecting portion is located at the second connecting sheet 12 and away from the above-mentioned end. The second connecting sheet 12 is connected to the first connecting sheet 11, and the electrode connecting portion is located at the second connecting sheet 12 away from the end, that is, the second connecting sheet 12 extends in a direction away from the first connecting sheet 11, and the electrode connecting portion is located at an end away from the first connecting sheet 11, so the electrode connecting portion and the cold plate connecting portion are located in different directions, so that the second connecting sheet 12 is convenient for contact and connection with the electrode connecting sheet 200, and the second connecting sheet 12 and the electrode connecting sheet 200 can be connected in the direction of welding or bonding.

[0066] In an optional embodiment, the second connecting piece 12 includes a second sub-connecting piece 121 and a first sub-connecting piece 122, the first sub-connecting piece 122 is connected to the end or the middle of the second sub-connecting piece 121, the first sub-connecting piece 122 is connected to the first connecting piece 11, and the electrode connecting portion is located at the second sub-connecting piece 121.

[0067] like Figure 1 and Figure 2 As shown, the second connecting piece 12 includes a second sub-connecting piece 121 and a first sub-connecting piece 122, the second sub-connecting piece 121 is used to connect with the electrode connecting piece 200, and the first sub-connecting piece 122 is used to connect with the first connecting piece 11. The second sub-connecting piece 121 and the first sub-connecting piece 122 are connected in an L-shape or an inverted T-shape, and the second sub-connecting piece 121 and the first sub-connecting piece 122 can also form an avoidance zone, so as to avoid the components in the battery pack or the parts at the end of the battery cell 300.

[0068] Further description, the second sub-connecting sheet 121 includes a third surface and a fourth surface, the third surface and the fourth surface are arranged opposite to each other, the electrode connecting portion is located on the third surface, and the third surface is bonded to the outer surface of the electrode connecting sheet 200, thereby increasing the contact area between the connecting member 100 and the electrode connecting sheet 200 to improve the thermal conductivity of the connecting member 100.

[0069] In an optional implementation, the first sub-connecting piece 122 includes a bending portion, and the bending portion forms an escape zone.

[0070] In one embodiment, the first sub-connecting piece 122 includes a bending portion, and the bending portion forms an escape area.

[0071] In one embodiment, the first sub-connecting piece 122 includes two bent portions, and the two bent portions form an escape zone.

[0072] In a specific embodiment, the first sub-connecting plate 122 includes three bending portions, which are respectively a first bending portion 1221, a second bending portion 1222 and a third bending portion 1223. The first bending portion 1221 and the second bending portion 1222 form a first avoidance area 13, and the second bending portion 1222 and the third bending portion 1223 form a second avoidance area 14.

[0073] like Figure 1 and Figure 2 As shown, the first avoidance area 13 and the second avoidance area 14 are used to avoid the injection holes or other components on the battery cell 300 to avoid blocking the injection holes or other components.

[0074] To further explain, the first bending portion 1221 is connected to the first connecting piece 11 , and the third bending portion 1223 is connected to the second sub-connecting piece 121 .

[0075] The length direction of the first bending portion 1221 is different from the length direction of the second bending portion 1222, so the first bending portion 1221 can form a first avoidance zone 13 with the second bending portion 1222, and the angle between the length direction of the first bending portion 1221 and the length direction of the second bending portion 1222 can be a right angle or an obtuse angle. The length direction of the second bending portion 1222 is different from the length direction of the third bending portion 1223, so the second bending portion 1222 and the third bending portion 1223 can form a second avoidance zone 14, and the length direction of the second bending portion 1222 and the length direction of the third bending portion 1223 can be a right angle or an obtuse angle.

[0076] In an optional implementation, the first connecting piece 11 is provided with a second insulating layer.

[0077] Further explanation: the first surface of the first connecting piece 11 or the outer surface of the first connecting piece 11 is provided with a second insulating layer. The second insulating layer can reduce the risk of electrical connection between the connector 100 and the cold plate 400 to a certain extent, so as to improve the stability of the battery pack performance.

[0078] In one embodiment, the second insulating layer is disposed on the first surface, so that the first connecting sheet 11 and the cold plate 400 are in an insulating relationship, thereby reducing the risk of arcing. In this embodiment, the first connecting sheet 11 and the cold plate 400 are connected by a thermally conductive adhesive, thereby achieving heat exchange between the electrode connecting sheet 200 and the cold plate 400.

[0079] In another embodiment, the second insulating layer completely wraps the first connecting piece 11, which can be understood as the first connecting piece 11 is completely wrapped by the second insulating layer. In this embodiment, the first connecting piece 11 can be sandwiched between the cold plate 400 and the battery cell 300, and the first connecting piece 11 and the cold plate 400 are in an insulating relationship, and the first connecting piece 11 and the battery cell 300 are also in an insulating relationship, thereby reducing the risk of arcing and improving electrical safety, and the first connection is sandwiched between the cold plate 400 and the battery cell 300, which can improve the installation firmness of the connector 100. In this embodiment, the first connecting piece 11 can also be bonded only to the cold plate 400.

[0080] To further illustrate, the second insulating layer may be made of a PI film, namely a polyimide film, which can ensure insulation protection while also improving heat conduction efficiency.

[0081] In an optional implementation, the first sub-connecting sheet 122 is provided with a first insulating layer.

[0082] To further illustrate, the outer surface of the first sub-connecting sheet 122 is provided with a first insulating layer, and the provision of the first insulating layer can reduce the risk of electrical connection between the first sub-connecting sheet 122 and the battery cell 300 to a certain extent, so as to improve the electrical safety of the battery pack.

[0083] The first insulating layer can be made of epoxy resin, which has a good insulating effect.

[0084] In an optional embodiment, the connecting member further includes a sampling connection portion, and the sampling connection portion is electrically connected to the electrode connection portion.

[0085] The electrode connection part is electrically connected to the sampling connection part, and the sampling connection part is used to be electrically connected to the battery management system, so that the battery management system can collect the voltage of the electrode output terminal 301 through the connector 100. The connector 100 can play a heat conduction role and can also act as a sampling line in the battery pack, that is, the voltage sampling line in the battery pack and the heat conductor for the electrode output terminal 301 are integrated on the connector 100. Due to the limited installation space in the battery pack, there is no need to set two components in the battery pack to cool the electrode output terminal 301 and collect the voltage of the electrode output terminal 301 respectively. The connector 100 provided in this application can improve the space utilization rate inside the battery pack.

[0086] In an optional embodiment, the connector 100 further includes a third connecting piece, the third connecting piece is electrically connected to the first connecting piece 11, and the sampling connection portion is located on the third connecting piece. The third connecting piece is used to connect to a battery management system.

[0087] In an optional implementation, the sampling connection portion is located on the first connection piece 11 or the second connection piece 12 .

[0088] When the connector 100 is made of metal and is integrally formed, in one embodiment, the sampling connection portion is located at the first connecting piece 11, the first connecting piece 11 includes a cold plate connecting portion and a sampling connection portion, the portion where the first connecting piece 11 is connected to the cold plate 400 is the cold plate connecting portion, a second insulating layer may be provided at the cold plate connecting portion, the portion where the first connecting piece 11 is connected to the battery management system is the sampling connection portion, and no insulating layer is provided at the sampling connection portion; in another embodiment, the sampling connection portion is located at any one of the second connecting pieces 12, and the battery management system is connected to the second connecting piece 12.

[0089] In an embodiment with multiple second connecting pieces 12, multiple second connecting pieces 12 are connected to the first connecting piece 11, and one second connecting piece 12 is used to be connected to a corresponding electrode connecting piece 200. The connector 100 can act as a sampling line. The battery management system collects the voltage of the electrode output terminal 301 through the connector 100, that is, the heat dissipation of the electrode output terminal 301 and the voltage collection of the electrode output terminal 301 are integrated on the connector 100, which can improve the space utilization inside the battery pack; and the structure is simple, easy to install, has good heat dissipation effect, and is light in weight, which is conducive to realizing a lightweight design of the battery pack.

[0090] In an optional embodiment, the connector 100 includes a cooling block 21, the cooling block 21 includes a first end face 211 and a second end face 212, the first end face 211 is arranged opposite to the second end face 212, a groove 215 is arranged on the first end face 211, the electrode connecting part is located in the groove 215, and the cold plate connecting part is located in the second end face 212.

[0091] The connector 100 includes a cooling block 21, and the cross section of the cooling block 21 can be square, rectangular, hexagonal, octagonal, etc. The cooling block 21 has multiple faces, which can improve the heat dissipation effect.

[0092] like Figure 4 and Figure 5 As shown, the cooling block 21 includes a first end face 211 and a second end face 212, and the first end face 211 and the second end face 212 are arranged opposite to each other, that is, the first end face 211 and the second end face 212 are parallel or relatively parallel to each other; the first end face 211 and the second end face 212 are arranged opposite to each other, which can avoid the electrode output end 301 and avoid blocking the electrode output end 301. A groove 215 is provided on the first end face 211, and the electrode connecting part is located in the groove 215. The electrode connecting sheet 200 is embedded in the groove 215 and abuts against the groove 215. The cold plate connecting part is located at the second end face 212, and is used to connect with the surface of the cold plate 400. In this embodiment, the groove 215 has multiple faces, and the electrode connecting sheet 200 is embedded in the groove 215 and abuts against the groove 215, so that the contact area between the electrode connecting sheet 200 and the cooling block 21 can be increased, thereby improving the heat conduction effect.

[0093] To further illustrate, the cross-section of the groove 215 may be square, rectangular, U-shaped or other shapes, and the cross-sectional shape of the groove 215 may correspond to the cross-sectional shape of the electrode connecting sheet 200 , so that the electrode connecting sheet 200 and the groove 215 can achieve multi-faceted contact.

[0094] Further, the electrode connecting sheet 200 can be welded to the groove 215 to improve the connection firmness between the cooling block 21 and the electrode connecting sheet 200. The groove 215 can also be filled with conductive and thermally conductive glue to fix the electrode connecting sheet 200 and the groove 215 together, and can also improve the thermal conductivity effect.

[0095] Further, through the connector 100, the heat generated on the electrode connecting sheet 200 can be quickly conducted to the cold plate 400, and further carried away by the cooling medium flowing through the cold plate 400, thereby maintaining the temperature of the electrode output end 301 within a preset operating temperature range to improve the power safety of the battery.

[0096] In an optional embodiment, the cooling block 21 includes a third end face 213, and the third end face 213 is respectively connected to the first end face 211 and the second end face 212; the connecting member 100 also includes a first extension plate 22, and the first extension plate 22 has a fifth end face, and the fifth end face intersects with the third end face 213.

[0097] like Figure 4 and Figure 5 As shown, the cooling block 21 includes a third end face 213, and the third end face 213 connects the first end face 211 and the second end face 212. The connector 100 also includes a first extension plate 22, and the fifth end face of the first extension plate 22 intersects and fits with the third end face 213, so that the first extension plate 22 is connected to the cooling block 21 and extends in a direction away from the third end face 213.

[0098] Further explanation, the first extension plate 22 is used to be sandwiched between the battery cell 300 and the cold plate 400, so as to improve the installation firmness of the connector 100, and the first extension plate 22 is in contact with the cold plate 400, which can also increase the contact area between the connector 100 and the cold plate 400, so as to improve the heat conduction effect of the connector 100. The connector 100 in this embodiment is suitable for one end of the battery cell 300 close to the crossbeam of the tray.

[0099] In a preferred embodiment, the end surface of the first extension plate 22 away from the first end surface 211 is flush with the second end surface 212 to facilitate installation of the connector 100 and maximize the contact area between the connector 100 and the cold plate 400 to improve heat conduction.

[0100] In an optional embodiment, the cooling block 21 includes a fourth end face 214, which is arranged opposite to the third end face 213; the connecting member 100 also includes a second extension plate 23, which has a sixth end face, and the sixth end face intersects with the fourth end 214.

[0101] like Figure 6 As shown, the cooling block 21 includes a fourth end face 214, and the fourth end face 214 is arranged opposite to the third end face 213. In other words, the fourth end face 214 also connects the first end face 211 and the second end face 212. The connector 100 also includes a second extension plate 23, and the sixth end face of the second extension plate 23 intersects and fits with the fourth end face 214, so that the second extension plate 23 is connected to the cooling block 21 and extends in a direction away from the fourth end face 214. In other words, the first extension plate 22 and the second extension plate 23 extend in opposite directions.

[0102] The connector 100 in this embodiment is suitable for a battery pack with two battery cells. The two battery cells are spaced apart along the length direction of the battery cell 300. The connector 100 is disposed between the two battery cells. The first extension plate 22 is sandwiched between one of the battery cells and the cold plate 400, and the second extension plate 23 is sandwiched between the other battery cell and the cold plate 400. Thus, the installation firmness of the connector 100 is improved, and the first extension plate 22 contacts the cold plate 400, and the second extension plate 23 also contacts the cold plate 400, so that the contact area between the connector 100 and the cold plate 400 can be increased to improve the heat conduction effect of the connector 100.

[0103] In an optional implementation, a third insulating layer is provided on the outer surface of the connector 100 .

[0104] It is further explained that the outer surface of the connector 100 is provided with a third insulating layer, wherein the outer surface on which the third insulating layer is provided includes the outer surface of the first extension plate 22, the surface of the second extension plate 23, the first end face 211, the second end face 212, the third end face 213, the fourth end face 214, and the two end faces connecting the third end face 213 and the fourth end face 214. The provision of the third insulating layer can reduce the risk of electrical connection between the connector 100 and the battery cell 300 and the cold plate 400 to a certain extent, so as to improve the electrical safety of the battery pack.

[0105] To further illustrate, the outer surface of the connector 100 may be insulated by insulation pretreatment, and the treatment methods include but are not limited to vapor deposition, electroplating, anodizing, thermal spraying, powder spraying, etc.

[0106] In an optional implementation, the cooling block 21 is provided with at least one through hole 216 .

[0107] like Figure 7 As shown, the cooling block 21 is provided with at least one through hole 216, which can increase the heat dissipation area on the one hand, and can also effectively reduce the weight of the battery pack and reduce the cost while maintaining the thermal conductivity and structural strength.

[0108] In one embodiment, the through hole 216 may be a through hole in the width direction of the cooling block 21 , and a plurality of through holes 216 are spaced apart along the length direction of the cooling block 21 to increase the heat dissipation area and reduce the weight of the cooling block 21 .

[0109] In another embodiment, the through hole 216 can also be a through hole in the length direction of the cooling block 21, and one or two through holes 216 can be opened. If two through holes 216 are opened, the two through holes 216 can be spaced apart along the height direction of the cooling block 21 to increase the heat dissipation area and reduce the weight of the cooling block 21.

[0110] To further illustrate, the cross-sectional shape of the through hole 216 includes but is not limited to any one of a polygon, a rounded rectangle, a circle, an ellipse or a waist shape, or a combination of at least two of them.

[0111] In an alternative embodiment, Figure 8 As shown, a heat dissipation pipe 24 is disposed inside the cooling block 21 .

[0112] In one embodiment, a communicating groove is opened inside the cooling block 21, and the groove is a heat dissipation pipe 24; in one embodiment, a receiving cavity is opened inside the cooling block 21, and a heat dissipation pipe 24 is arranged in the receiving cavity.

[0113] Further explanation, a cooling medium is placed in the heat dissipation pipe 24, and the cooling medium absorbs heat and changes from the first phase to the second phase, and the second phase changes to the first phase after being cooled. The cooling medium absorbs the heat at the electrode connecting sheet 200 and changes to the second phase, and the cooling medium in the second phase moves toward the cold plate 400, and changes to the first phase after being cooled, thereby realizing circulation, which can speed up the transfer speed of heat at the electrode connecting sheet 200 and achieve a better cooling effect.

[0114] The first phase may be liquid, and the second phase may be gas.

[0115] The cross section of the heat dissipation pipe 24 may be circular or irregular.

[0116] In a preferred embodiment, a capillary structure is provided inside the heat dissipation pipe 24 near the electrode connecting sheet 200 to ensure that the cooling medium is in a well-wetted state.

[0117] In an optional implementation, the connecting member 100 is made of metal.

[0118] The connector 100 is made of metal, which enables the connector 100 to be electrically connected to the electrode connector 200. The metal material has good thermal conductivity, which is conducive to heat exchange between the electrode connector 200 and the cold plate 400, and achieves the effect of rapid heat dissipation of the electrode output end 301, so as to improve the power safety of the battery pack. The metal material can be one of gold, silver, copper, aluminum, iron or alloy.

[0119] In an optional implementation, the connector 100 includes a sampling connection portion, and the sampling connection portion is electrically connected to the electrode connection portion.

[0120] To further illustrate, the sampling connection portion may be located in the groove 215 , the first end surface 211 , the second end surface 212 or other locations, as long as the sampling connection portion and the electrode connection portion can be electrically connected.

[0121] Multiple electrode connecting sheets 200 in the battery pack are embedded in the groove 215. Since the electrode connecting sheet 200 is electrically connected to the groove 215, the voltage of the electrode output terminal 301 can be collected, and heat dissipation and cooling and voltage collection are integrated on the connector 100 to improve the space utilization inside the battery pack.

[0122] The surface in the groove 215 is not provided with the third insulating layer, so that the connecting member 100 can be electrically connected to the electrode connecting sheet 200 .

[0123] According to a second aspect of an embodiment of the present application, a battery pack is provided, comprising a battery cell 300, a cold plate 400 and a connector 100, wherein the battery cell 300 comprises an electrode output terminal 301; the electrode connecting portion is electrically connected to the electrode output terminal 301, and the cold plate connecting portion is in contact with the cold plate 400.

[0124] In a specific embodiment, the battery pack includes a plurality of battery cells 300, a plurality of electrode connecting sheets 200, a cold plate 400 and a connector 100; the plurality of battery cells 300 are sequentially arranged along the width direction of the battery cell cells 300, and each battery cell 300 includes an electrode output terminal 301; each electrode connecting sheet 200 connects the electrode output terminals 301 of two adjacent battery cells 300; the cold plate 400 is arranged on one side in the height direction of the battery cell cells 300 and is arranged along the width direction of the battery cell cells 300; the cold plate connecting portion of the connector 100 is connected to the cold plate 400, and the electrode connecting portion of the connector 100 is in contact with the electrode connecting sheet 200 and is electrically connected to the electrode connecting sheet 200, so that the connector 100 can play a role in cooling the electrode output terminal 301, thereby reducing the temperature of the electrode output terminal 301 and improving the power safety of the battery pack.

[0125] In an optional embodiment, the battery pack includes a plurality of the battery cells 300 , the plurality of the battery cells 300 are arranged at intervals along the length direction of the battery pack, and the connector 100 is arranged between two adjacent battery cells 300 .

[0126] In one embodiment, the cold plate 400 is disposed on one side of the battery cell 300, and the first extension plate 22 of the connector 100 is sandwiched between the battery cell 300 and the cold plate 400. The first extension plate 22 is used to be sandwiched between the battery cell 300 and the cold plate 400, so as to improve the installation firmness of the connector 100, and the first extension plate 22 is in contact with the cold plate 400, which can also increase the contact area between the connector 100 and the cold plate 400 to improve the thermal conductivity of the connector 100. The connector 100 in this embodiment is suitable for one end of the battery cell 300 close to the crossbeam of the tray. When two battery cells 300 are arranged at intervals, a gap is formed between the two battery cells 300, and the connector 100 can also be arranged in the gap between two adjacent battery cells 300.

[0127] In one embodiment, Figure 6 As shown, the cold plate 400 is arranged on one side of the battery cell 300, the first extension plate 22 of the connector 100 is clamped between one of the two adjacent battery cells 300 and the cold plate 400, and the second extension plate 23 of the connector 100 is clamped between the other of the two adjacent battery cells 300 and the cold plate 400.

[0128] In a specific embodiment, the battery pack includes two battery cells 300 arranged at intervals, a gap is formed between the two battery cells 300, the connector 100 is arranged in the gap between the two adjacent battery cells 300, and the electrode connecting sheet 200 is partially located in the groove 215 and abuts against the groove 215. In this embodiment, the electrode output ends 301 of the two battery cells 300 are connected to the battery output ends 301 through the thickened electrode connecting sheet 200, and only one connector 100 is needed to quickly transfer the heat on the electrode connecting sheet 200 to the cold plates 400 on both sides at the same time, which can reduce the number and volume of the connectors 100, save the installation space in the battery pack, and improve the space utilization. In addition, the connector 100 is located between the two battery cells 300, and the first extension plate 22 and the second extension plate 23 are both sandwiched between the battery cells 300 and the cold plate 400, so as to improve the installation firmness of the connector 100.

[0129] In an optional embodiment, the battery pack includes two battery cell units, which are formed by a plurality of battery cell units 300 arranged in sequence along the width direction of the battery cell units 300, and two battery cell units are arranged in sequence along the length direction of the battery cell units 300, and the electrode output ends 301 between two adjacent battery cell units 300 are connected through an electrode connecting sheet 200, and the connecting member 100 is arranged between the two battery cell units.

[0130] In an optional implementation, the battery pack further includes a battery management system, and the battery management system is electrically connected to the sampling connection portion of the connector.

[0131] Since the installation space in the battery pack is limited, there is no need to set two components in the battery pack to cool the electrode output terminal 301 and collect the voltage of the electrode output terminal 301 respectively. However, the connector 100 provided in the present application can improve the space utilization rate inside the battery pack. It can also act as a sampling line in the battery pack, and realize the voltage collection and cooling of the electrode output terminal 301 at the same time through the connector 100, that is, the voltage collection of the electrode output terminal 301 and the cooling of the electrode output terminal 301 are integrated on the connector 100, thereby improving the space utilization rate inside the battery pack.

[0132] According to a third aspect of an embodiment of the present application, there is provided an electrical device comprising the above-mentioned battery pack.

[0133] The battery pack of the embodiment of the present application can be applied to various types of electrical equipment using batteries.

[0134] The electrical equipment may be a battery vehicle, an electric vehicle, a ship, a spacecraft, etc. The embodiments of the present disclosure do not impose any particular restrictions on the above-mentioned electrical equipment.

[0135] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A connecting piece, characterized in that: include: An electrode connecting portion, the electrode connecting portion being suitable for electrically connecting to an electrode output end (301) of a battery cell (300); and a cold plate connection portion: the cold plate connection portion is thermally connected to the electrode connection portion, and the cold plate connection portion is suitable for contacting a cold plate (400) outside the battery cell (300).

2. The connecting piece according to claim 1, characterized in that: The connecting member (100) comprises: A first connecting piece (11), wherein the cold plate connecting portion is located on the first connecting piece (11); A second connecting sheet (12), wherein the second connecting sheet (12) is connected to the first connecting sheet (11), and the electrode connecting portion is located on the second connecting sheet (12).

3. The connecting piece according to claim 2, characterized in that: The first connecting piece (11) and the second connecting piece (12) form an included angle.

4. The connecting piece according to claim 2, characterized in that: The connecting member (100) comprises a plurality of second connecting pieces (12), and the plurality of second connecting pieces (12) are arranged at intervals along the length direction of the first connecting piece (11).

5. The connecting piece according to claim 2, characterized in that: The second connecting piece (12) comprises a first sub-connecting piece (122) and a second sub-connecting piece (121); the first sub-connecting piece (122) is connected to an end portion or a middle portion of the second sub-connecting piece (121); the first sub-connecting piece (122) is connected to the first connecting piece (11); and the electrode connecting portion is located on the second sub-connecting piece (121).

6. The connecting piece according to claim 5, characterized in that: The first sub-connecting piece (122) comprises a bending portion, and the bending portion forms an escape zone.

7. The connecting piece according to claim 5, characterized in that: The first sub-connecting sheet (122) is provided with a first insulating layer, and / or the first connecting sheet (11) is provided with a second insulating layer.

8. The connecting piece according to claim 2, characterized in that: The connecting piece (100) further comprises a sampling connecting portion, wherein the sampling connecting portion is electrically connected to the electrode connecting portion.

9. The connecting piece according to claim 8, characterized in that: The sampling connection portion is located on the first connection piece (11) or the second connection piece (12).

10. The connector according to claim 1, characterized in that: The connecting piece comprises: A cooling block (21), the cooling block comprising a first end surface (211) and a second end surface (212), the first end surface (211) and the second end surface (212) being arranged opposite to each other, a groove (215) being arranged on the first end surface (211), the electrode connecting portion being adapted in shape to the groove (215), and the cold plate connecting portion being located on the second end surface (212).

11. The connecting piece according to claim 10, characterized in that: The cooling block (21) comprises a third end surface (213), and the third end surface (213) is respectively connected to the first end surface (211) and the second end surface (212); The connecting member (100) further comprises a first extension plate (22), wherein the first extension plate (22) has a fifth end surface (221), and the fifth end surface (221) intersects with the third end surface (213).

12. The connecting piece according to claim 11, characterized in that: The cooling block (21) comprises a fourth end surface (214), and the fourth end surface (214) is arranged opposite to the third end surface (213); The connecting member further comprises a second extension plate (23), wherein the second extension plate (23) has a sixth end surface (231), and the sixth end surface (231) intersects with the fourth end surface (214).

13. The connecting piece according to claim 10, characterized in that: The outer surface of the cooling block (21) is provided with a third insulating layer.

14. The connecting piece according to any one of claims 10 to 13, characterized in that: The cooling block (21) is provided with at least one through hole (216), and the through hole (216) is used to increase the heat conduction area of ​​the cooling block (21).

15. The connecting piece according to any one of claims 10 to 13, characterized in that: A heat dissipation pipeline (24) is arranged inside the cooling block (21).

16. The connector according to claim 1, characterized in that The connecting piece (100) is made of metal.

17. A battery pack, characterized in that: include: A battery cell (300), wherein the battery cell (300) comprises an electrode output end (301); Cold plate (400); According to the connector (100) according to any one of claims 1 to 16, the electrode connecting portion is electrically connected to the electrode output end, and the cold plate connecting portion is in contact with the cold plate (400).

18. The battery pack according to claim 17, characterized in that: The battery pack comprises a plurality of battery cell monomers (300), the plurality of battery cell monomers (300) are arranged at intervals along the length direction of the battery pack, and the connecting member (100) is arranged between two adjacent battery cell monomers (300).

19. The battery pack according to claim 17, characterized in that: The cold plate (400) is arranged on one side of the battery cell (300), and the first extension plate (22) of the connecting member (100) is sandwiched between the battery cell (300) and the cold plate (400).

20. The battery pack according to claim 18, characterized in that: The cold plate (400) is arranged on one side of the battery cell (300), the first extension plate (22) of the connecting member (100) is sandwiched between one of the two adjacent battery cell monomers (300) and the cold plate, and the second extension plate (23) of the connecting member (100) is sandwiched between the other of the two adjacent battery cell monomers (300) and the cold plate (400).

21. An electrical equipment, characterized in that: Comprising a battery pack as described in any one of claims 17-20.

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