Wire and energy storage device

Abstract

The utility model relates to the technical field of energy batteries, and discloses a lead and an energy storage device, the lead is suitable for being connected between adjacent battery clusters, the lead comprises an electric conductor and an insulator, a cooling flow channel suitable for bearing cooling liquid is arranged in the electric conductor, one end of the cooling flow channel is provided with a liquid inlet, and the other end of the cooling flow channel is provided with a liquid outlet. Cooling liquid flows into the cooling flow channel from the liquid inlet and flows out from the liquid outlet, and the insulator wraps the periphery of the electric conductor. The wire is connected between the adjacent battery clusters and can replace a copper bar, and the cooling liquid flows into the cooling flow channel from the liquid inlet and flows out from the liquid outlet, so that heat generated when the electric conductor is electrified is taken away, the electric conductor is cooled, the limitation of temperature rise on the over-current capability of the electric conductor is relieved, and the service life of the electric conductor is prolonged. The overcurrent capacity of the wire is improved, the large-current connection requirement between battery clusters is met, and the situation that the whole machine weight is increased due to the arrangement of a large-section copper bar is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of energy batteries, and in particular to a conductor and an energy storage device. Background Art

[0002] The container of a large energy storage power station is generally composed of single cells connected in series and parallel to form multiple battery clusters, and multiple battery clusters are connected in parallel through copper bars to form an energy storage container.

[0003] Since the total current of the battery cluster is large, a copper busbar with a large cross-section is required to meet the overcurrent capacity. The larger the current, the greater the temperature rise of the copper busbar. The greater the temperature rise, the greater the overcurrent capacity of the copper busbar. Utility Model Content

[0004] In view of this, the utility model provides a conductor and an energy storage device to solve the problem that the current carrying capacity of the existing copper busbar is limited by temperature rise.

[0005] A first aspect of the utility model provides a conductive wire suitable for connecting between adjacent battery clusters, wherein the conductive wire comprises a conductor and an insulator, wherein a cooling channel suitable for carrying a coolant is arranged inside the conductor, wherein one end of the cooling channel has a liquid inlet, and the other end of the cooling channel has a liquid outlet, wherein the coolant flows into the cooling channel from the liquid inlet and flows out from the liquid outlet, and wherein the insulator is coated on the outer periphery of the conductor.

[0006] Beneficial effect: The conductive wire of the utility model is connected between adjacent battery clusters and can replace the function of the copper busbar. By setting a cooling channel inside the conductor, the coolant flows into the cooling channel from the liquid inlet and flows out from the liquid outlet, thereby taking away the heat generated when the conductor is energized and cooling the conductor. The limitation of temperature rise on the overcurrent capacity of the conductor is removed, the overcurrent capacity of the conductive wire is improved, and the large current connection requirements between battery clusters are met. The increase in the weight of the whole machine caused by the setting of a large-section copper busbar is avoided. The insulator is coated on the periphery of the conductor to achieve external insulation protection of the conductor and improve safety in use.

[0007] In an optional embodiment, the conductor includes a first conductive layer, a second conductive layer and an insulating separator layer, the first conductive layer is suitable for connecting to the positive electrodes of two adjacent battery clusters, the second conductive layer is suitable for connecting to the negative electrodes of two adjacent battery clusters, and the insulating separator layer is arranged between the first conductive layer and the second conductive layer.

[0008] Beneficial effect: The conductor is arranged in the form of a first conductive layer and a second conductive layer, and is separated into two independent conductive units by an insulating separation layer, so that the first conductive layer is connected to the positive electrodes of two adjacent battery clusters, and the second conductive layer is connected to the negative electrodes of two adjacent battery clusters, thereby realizing the connection of positive and negative currents through the same wire, that is, one wire can replace the role of two copper bars (positive and negative copper bars), with high structural integration and good economy.

[0009] In an optional embodiment, the first conductive layer is in the shape of an elongated strip and has a first opening facing the side, the second conductive layer is in the shape of an elongated strip and has a second opening facing the side, the first opening of the first conductive layer and the second opening of the second conductive layer are butted together along a direction perpendicular to the extension direction of the conductor so that the cooling channel is enclosed between the first conductive layer and the first conductive layer, and the insulating separation layer is arranged at the butt joint between the first conductive layer and the second conductive layer.

[0010] Beneficial effect: The conductor is separated into a first conductive layer and a second conductive layer that are butted against each other by an insulating separation layer, so that the first conductive layer and the second conductive layer form two independent conductive units, while minimizing the increase in the diameter of the wire and saving the setting cost.

[0011] In an optional embodiment, the cooling channel includes a first channel and a second channel, the insulating separation layer is located between the first channel and the second channel, and the insulating separation layer and the first conductive layer cooperate to form the first channel, and the insulating separation layer and the second conductive layer cooperate to form the second channel.

[0012] Beneficial effect: The insulating separation layer separates the first conductive layer and the second conductive layer, and at the same time, separates the first flow channel and the second flow channel, so that the first conductive layer is cooled by the coolant in the first flow channel, and the second conductive layer is cooled by the coolant in the second flow channel, thereby ensuring the overcurrent capacity of the first conductive layer and the second conductive layer.

[0013] In an optional embodiment, the insulating separation layer is arranged at the junction of the first conductive layer and the second conductive layer, and the inner surface of the insulating separation layer is flush with the inner surfaces of the first conductive layer and the second conductive layer or protrudes toward the center of the wire, and the outer surface of the insulating separation layer is flush with the outer surfaces of the first conductive layer and the second conductive layer or protrudes away from the center of the wire.

[0014] Beneficial effect: The insulating separation layer is only arranged at the joint of the first conductive layer and the second conductive layer, which plays the role of insulating and separating the first conductive layer and the second conductive layer. The coolant in the cooling channel cools down the first conductive layer and the second conductive layer at the same time, thereby ensuring the overcurrent capacity of the first conductive layer and the second conductive layer.

[0015] In an optional implementation, the insulating separation layer and the insulator are integrally formed.

[0016] Beneficial effect: By arranging the insulating separation layer and the insulator into an integrally formed form, the number of individual parts and the assembly process can be reduced, thereby saving manufacturing and assembly costs.

[0017] In an optional embodiment, the conductor further includes a first connection structure and / or a second connection structure, wherein the first connection structure is used to seal the insulating separation layer and the first conductive layer, and the second connection structure is used to seal the insulating separation layer and the second conductive layer.

[0018] Beneficial effect: The insulating separation layer and the first conductive layer are sealed and connected by the first connecting structure, and the insulating separation layer and the second conductive layer are sealed and connected by the second connecting structure, so as to ensure the sealing of the connection between the insulating separation layer and the first conductive layer and the second conductive layer, and prevent the coolant in the cooling channel from leaking from the connecting gap.

[0019] In an optional embodiment, the first connecting structure includes a matching first connecting protrusion and a first connecting groove, one of the first connecting protrusion and the first connecting groove is arranged on the insulating separation layer, and the other is arranged on the first conductive layer; and / or, the second connecting structure includes a matching second connecting protrusion and a second connecting groove, one of the second connecting protrusion and the second connecting groove is arranged on the insulating separation layer, and the other is arranged on the second conductive layer.

[0020] Beneficial effects: The first connection structure is set in the form of a first connection protrusion and a first connection groove, and the first connection protrusion is plugged into the first connection groove during assembly, thereby realizing a sealed connection between the insulating separation layer and the first conductive layer; the second connection structure is set in the form of a second connection protrusion and a second connection groove, and the second connection protrusion is plugged into the second connection groove during assembly, thereby realizing a sealed connection between the insulating separation layer and the second conductive layer.

[0021] In an optional embodiment, a “labyrinth sealing structure” is formed between the first connecting protrusion and the first connecting groove, and / or between the second connecting protrusion and the second connecting groove.

[0022] Beneficial effect: The "labyrinth sealing structure" is used to seal between the insulating separation layer and the first conductive layer, and between the insulating separation layer and the second conductive layer, so as to enhance the sealing of the coolant in the cooling channel.

[0023] A second aspect of the utility model provides an energy storage device, comprising a battery cluster and the wire of the present application, wherein the battery cluster is formed by a plurality of single batteries connected in series and / or in parallel, and the wire is connected between two adjacent battery clusters.

[0024] Beneficial effects: The energy storage device of the present application includes a battery cluster and the wire of the present application. The wire is connected between two adjacent battery clusters to replace the role of the copper busbar. The wire is cooled by coolant inside, which eliminates the limitation of temperature rise on the overcurrent capacity of the wire, improves the overcurrent capacity of the wire, meets the large current connection requirements between battery clusters, and avoids the increase in the weight of the whole machine caused by setting a large-section copper busbar.

[0025] In an optional embodiment, the conductor of the wire includes a first conductive layer, a second conductive layer and an insulating separation layer, the first conductive layer is in the shape of an elongated strip and has a first opening facing the side, the second conductive layer is in the shape of an elongated strip and has a second opening facing the side, the first opening of the first conductive layer and the second opening of the second conductive layer are butted along a direction perpendicular to the extension direction of the conductor so that the cooling channel is enclosed between the first conductive layer and the first conductive layer, the insulating separation layer is arranged between the first conductive layer and the second conductive layer, the first conductive layer is connected to the positive electrodes of two adjacent battery clusters, and the second conductive layer is connected to the negative electrodes of two adjacent battery clusters.

[0026] Beneficial effect: The positive and negative electrodes of two adjacent battery clusters can be connected by one wire, that is, one wire replaces the function of two copper bars, which saves costs, has high integration and good economy. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 A cross-sectional view of a wire according to a first embodiment of the utility model;

[0029] Figure 2 A cross-sectional view of a wire according to a second embodiment of the present utility model;

[0030] Figure 3 A cross-sectional view of a conductor according to a third embodiment of the present utility model;

[0031] Figure 4 is a cross-sectional view of a conductor according to a fourth embodiment of the present utility model;

[0032] Figure 5 is a cross-sectional view of a wire according to a fifth embodiment of the present utility model;

[0033] Figure 6 is a cross-sectional view of a wire according to a sixth embodiment of the utility model;

[0034] Figure 7 This is a schematic diagram of the structure of an energy storage device according to an embodiment of the utility model;

[0035] Figure 8 This is a schematic structural diagram of an energy storage device according to another embodiment of the utility model.

[0036] Description of reference numerals:

[0037] 1. Conductor; 11. Cooling channel; 111. First channel; 112. Second channel; 12. First conductive layer; 121. First connection protrusion; 13. Second conductive layer; 131. Second connection protrusion; 14. Insulating separation layer; 141. First connection groove; 142. Second connection groove;

[0038] 2. Insulator;

[0039] 100. Battery cluster. DETAILED DESCRIPTION

[0040] 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.

[0041] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they cannot be understood as limitations on the present invention.

[0042] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 the present invention can be understood according to specific circumstances.

[0043] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0044] Combine the following Figures 1 to 8 , describing an embodiment of the utility model.

[0045] According to an embodiment of the utility model, on the one hand, a conductive wire is disclosed, which is suitable for connecting between adjacent battery clusters 100, and the conductive wire includes a conductor 1 and an insulator 2, wherein a cooling channel 11 suitable for carrying a coolant is arranged inside the conductor 1, one end of the cooling channel 11 has a liquid inlet, and the other end of the cooling channel 11 has a liquid outlet, the coolant flows into the cooling channel 11 from the liquid inlet and flows out from the liquid outlet, and the insulator 2 is coated on the outer periphery of the conductor 1.

[0046] The wires of this embodiment are connected between adjacent battery clusters 100 and can replace the copper busbar. By setting a cooling channel 11 inside the conductor 1, the coolant flows into the cooling channel 11 from the liquid inlet and flows out from the liquid outlet, thereby taking away the heat generated when the conductor 1 is energized and cooling the conductor 1. The limitation of temperature rise on the overcurrent capacity of the conductor 1 is removed, the overcurrent capacity of the wire is improved, the large current connection requirements between the battery clusters 100 are met, and the increase in the weight of the whole machine caused by setting a large-section copper busbar is avoided. The insulator 2 is coated on the outer periphery of the conductor 1 to achieve external insulation protection of the conductor 1 and improve the safety of use.

[0047] In some embodiments, Figure 1 As shown, the conductor 1 is in the shape of a long strip, the length of which can be set as required, and the cross section of the conductor 1 is a circular ring or a polygonal ring structure. In this embodiment, the cross section of the conductor 1 is a circular ring structure for exemplary description.

[0048] The conductor 1 may specifically be a conductive metal, such as iron, copper or zinc.

[0049] The cooling channel 11 is formed in the hollow of the conductor 1. After the coolant enters the cooling channel 11 through the liquid inlet to cool the conductor 1, the coolant that absorbs the heat flows out from the liquid outlet, thereby achieving continuous dynamic cooling of the conductor 1 and ensuring the cooling effect.

[0050] The insulator 2 is used to wrap around the outer periphery of the conductor 1 to provide safety protection for the conductor 1 and avoid electric shock during use.

[0051] The shape and size of the insulator 2 match those of the conductor 1 to completely wrap the conductor 1. Specifically, the insulator 2 can also be configured to have a circular or polygonal ring structure in cross section according to the shape of the conductor 1.

[0052] As for the specific material, the insulator 2 can be made of insulating materials such as rubber, plastic, etc., and this embodiment does not make any specific limitation.

[0053] In some embodiments, the conductor 1 includes a first conductive layer 12, a second conductive layer 13 and an insulating separator layer 14, the first conductive layer 12 is suitable for connecting to the positive electrodes of two adjacent battery clusters, the second conductive layer 13 is suitable for connecting to the negative electrodes of two adjacent battery clusters, and the insulating separator layer 14 is arranged between the first conductive layer 12 and the second conductive layer 13.

[0054] In the above arrangement, the conductor is arranged in the form of a first conductive layer 12 and a second conductive layer 13, and is separated into two independent conductive units by an insulating separation layer, so that the first conductive layer 12 is connected to the positive electrodes of two adjacent battery clusters, and the second conductive layer 13 is connected to the negative electrodes of two adjacent battery clusters 100, thereby realizing the connection of positive and negative currents through the same wire, that is, one wire can replace the role of two copper bars (positive and negative copper bars), with high structural integration and good economy.

[0055] Specifically, the positive terminals of two adjacent battery clusters 100 are connected via a positive copper busbar, and the negative terminals are connected via a negative copper busbar. By separating the conductor 1 into the first conductive layer 12 and the second conductive layer 13, the first conductive layer 12 can be connected to the positive terminal of two adjacent battery clusters 100, and the second conductive layer 13 can be connected to the negative terminal of two adjacent battery clusters 100, thereby achieving the purpose of replacing two copper busbars with one conductive wire.

[0056] Exemplarily, the first conductive layer 12 and the second conductive layer 13 can be configured as annular tubular structures of unequal diameters, which are mutually nested, and the insulating separation layer 14 is disposed between the first conductive layer 12 and the second conductive layer 13 to play an insulating and separating role; the first conductive layer 12 and the second conductive layer 13 can also be configured to be butt-jointed with each other, and the insulating separation layer 14 is disposed at the joint of the first conductive layer 12 and the second conductive layer 13 to play an insulating and separating role.

[0057] like Figures 2 to 6 As shown in any of the figures, in this embodiment, the first conductive layer 12 is in the shape of an elongated strip and has a first opening toward the side, the second conductive layer 13 is in the shape of an elongated strip and has a second opening toward the side, the first opening of the first conductive layer 12 and the second opening of the second conductive layer 13 are butted along an extension direction perpendicular to the conductor 1 so that a cooling channel 11 is enclosed between the first conductive layers 12 and the first conductive layers 12, and an insulating separation layer 14 is arranged at the butt joint between the first conductive layer 12 and the second conductive layer 13.

[0058] This arrangement separates the conductor 1 into a first conductive layer 12 and a second conductive layer 13 that are butted against each other through an insulating separation layer 14, so that the first conductive layer 12 and the second conductive layer 13 form two independent conductive units, which can simultaneously connect positive and negative currents without increasing the diameter of the wire as much as possible, thus saving the arrangement cost.

[0059] The first conductive layer 12 and the second conductive layer 13 may be two symmetrical parts, specifically, may be a semicircular ring structure in cross section, and the two are connected to form a conductive body 1 with a circular ring structure in cross section.

[0060] The insulating separation layer 14 is a structure that separates the first conductive layer 12 and the second conductive layer 13 and has insulating properties so that the first conductive layer 12 and the second conductive layer 13 form an independent conductive unit.

[0061] Specifically, the insulating separation layer 14 may be made of insulating materials such as rubber, plastic, etc., and this embodiment does not impose any specific limitation.

[0062] like Figure 2 or Figure 3 As shown, in some embodiments, the cooling channel 11 includes a first channel 111 and a second channel 112, the insulating separation layer 14 is located between the first channel 111 and the second channel 112, and the insulating separation layer 14 and the first conductive layer 12 cooperate to form the first channel 111, and the insulating separation layer 14 and the second conductive layer 13 cooperate to form the second channel 112.

[0063] With this arrangement, the insulating separation layer 14 separates the first conductive layer 12 and the second conductive layer 13 while also separating the first flow channel 111 and the second flow channel 112, so that the first conductive layer 12 can be cooled by the coolant in the first flow channel 111 and the second conductive layer 13 can be cooled by the coolant in the second flow channel 112, thereby ensuring the overcurrent capacity of the first conductive layer 12 and the second conductive layer 13.

[0064] like Figure 4 , Figure 5 or Figure 6As shown, in some embodiments, the insulating separation layer 14 is disposed at the junction of the first conductive layer 12 and the second conductive layer 13, and the inner surface of the insulating separation layer 14 is flush with the inner surfaces of the first conductive layer 12 and the second conductive layer 13 or the inner surface of the insulating separation layer 14 protrudes toward the center of the wire, and the outer surface of the insulating separation layer 14 is flush with the outer surfaces of the first conductive layer 12 and the second conductive layer 13 or the outer surface of the insulating separation layer 14 protrudes away from the center of the wire.

[0065] In this arrangement, the insulating separation layer 14 is only arranged at the joint between the first conductive layer 12 and the second conductive layer 13, and plays the role of insulating and separating the first conductive layer 12 and the second conductive layer 13. The coolant in the cooling channel 11 cools down the first conductive layer 12 and the second conductive layer 13 at the same time, thereby ensuring the overcurrent capacity of the first conductive layer 12 and the second conductive layer 13.

[0066] It should be noted here that if the coolant is conductive, the inner walls of the first conductive layer 12 and the second conductive layer 13 need to be insulated. Specifically, an insulating film or a sprayed insulating layer can be provided on the inner walls of the first conductive layer 12 and the second conductive layer 13 to avoid a short circuit between the first conductive layer 12 and the second conductive layer 13 due to conduction through the coolant. If the coolant is not conductive, the first conductive layer 12 and the second conductive layer 13 are not insulated, and there is no conduction between the two.

[0067] In this embodiment, in order to reduce the installation cost and process, the coolant is deionized water or other non-conductive solutions.

[0068] The insulating separation layer 14 is also configured to be a long strip, and its length is matched with the length of the first conductive layer 12 and the second conductive layer 13. The inner surface of the insulating separation layer 14, the inner surface of the first conductive layer 12, and the inner surface of the second conductive layer 13 all refer to the side facing the cooling channel 11, and the outer surface of the insulating separation layer 14, the outer surface of the first conductive layer 12, and the outer surface of the second conductive layer 13 all refer to the side facing the insulator 2.

[0069] Further, such as Figure 3 or Figure 6 As shown, the insulating separation layer 14 and the insulator 2 are integrally formed. By arranging the insulating separation layer 14 and the insulator 2 in an integrally formed form, the number of single parts and assembly processes can be reduced, thereby saving manufacturing and assembly costs.

[0070] Of course, in some embodiments, the insulating separation layer 14 may be manufactured separately from the insulator 2 and then assembled, such as Figure 2 , Figure 4 or Figure 5 shown.

[0071] Furthermore, the conductor 1 further includes a first connection structure and a second connection structure, wherein the first connection structure is used to seal and connect the insulating separation layer 14 and the first conductive layer 12, and the second connection structure is used to seal and connect the insulating separation layer 14 and the second conductive layer 13. The first connection structure is provided to seal and connect the insulating separation layer 14 and the first conductive layer 12, and the second connection structure is provided to seal and connect the insulating separation layer 14 and the second conductive layer 13, so as to ensure the sealing of the connection between the insulating separation layer 14 and the first conductive layer 12 and the second conductive layer 13, and prevent the coolant in the cooling channel 11 from leaking out of the connection gap.

[0072] Specifically, Figure 2 , Figure 4 or Figure 5 As shown, the first connection structure includes a first connection protrusion 121 and a first connection groove 141 that match each other, one of which is provided at the insulating separation layer 14, and the other is provided at the first conductive layer 12. The first connection structure is provided in the form of the first connection protrusion 121 and the first connection groove 141, and the first connection protrusion 121 is plugged and matched in the first connection groove 141 during assembly, thereby achieving a sealed connection between the insulating separation layer 14 and the first conductive layer 12.

[0073] Correspondingly, the second connection structure includes a second connection protrusion 131 and a second connection groove 142 that match each other, one of which is arranged on the insulating separation layer 14, and the other is arranged on the second conductive layer 13. The second connection structure is arranged in the form of the second connection protrusion 131 and the second connection groove 142, and the second connection protrusion 131 is plugged and matched in the second connection groove 142 during assembly, so as to realize a sealed connection between the insulating separation layer 14 and the second conductive layer 13.

[0074] Preferably, the first connection protrusion 121 and the first connection groove 141, and the second connection protrusion 131 and the second connection groove 142 are interference fit to enhance the sealing performance. In this embodiment, since the first conductive layer 12 and the second conductive layer 13 are made of a harder material such as conductive metal, and the insulating separation layer 14 is made of a soft material such as plastic and rubber, a good seal can be achieved through the interference fit between the soft material and the hard material during the fit.

[0075] In this embodiment, the first connection protrusion 121 is disposed on the first conductive layer 12, the second connection protrusion 131 is disposed on the second conductive layer 13, and the first connection groove 141 and the second connection groove 142 are both disposed on the insulating separation layer 14. Of course, in other embodiments, the positions of the first connection protrusion 121 and the first connection groove 141, and the positions of the second connection protrusion 131 and the second connection groove 142 can be interchangeably disposed, and are not limited to this embodiment.

[0076] In terms of specific shapes, the first connecting protrusion 121 and the second connecting protrusion 131 may be rectangular protrusions, and the first connecting groove 141 and the second connecting groove 142 are correspondingly configured as rectangular grooves, and the rectangular protrusions are abutted and fitted in the rectangular grooves.

[0077] In addition, in some specific embodiments, a "labyrinth sealing structure" is formed between the first connection protrusion 121 and the first connection groove 141, and between the second connection protrusion 131 and the second connection groove 142. The "labyrinth sealing structure" is used to seal between the insulating separation layer 14 and the first conductive layer 12, and between the insulating separation layer 14 and the second conductive layer 13, so as to enhance the sealing performance of the coolant in the cooling channel 11.

[0078] It should be noted that the "labyrinth seal structure" can specifically be as follows Figure 5 The structure shown is that the first connecting protrusion 121 and the second connecting protrusion 131 are set as T-shaped protrusions, the first connecting groove 141 and the second connecting groove 142 are set as T-shaped grooves, and the T-shaped protrusion is fitted in the T-shaped groove, so that a plurality of turning sealing surfaces are formed between the outer surface of the T-shaped protrusion and the inner wall surface of the T-shaped groove, which can enhance the sealing effect of the internal coolant.

[0079] According to an embodiment of the present invention, on the other hand, an energy storage device is disclosed, including a battery cluster 100 and a wire of this embodiment, wherein the battery cluster 100 is formed by a plurality of single batteries connected in series and / or in parallel, and the wire is connected between two adjacent battery clusters 100 .

[0080] The energy storage device of the present application includes a battery cluster 100 and the wire of the present application. The wire is connected between two adjacent battery clusters 100 to replace the copper busbar. The wire is cooled by a coolant inside the wire, which eliminates the limitation of the temperature rise on the overcurrent capacity of the wire, improves the overcurrent capacity of the wire, meets the large current connection requirements between the battery clusters 100, and avoids the increase in the weight of the whole machine caused by setting a large-section copper busbar.

[0081] Specifically, a plurality of single cells are connected in series and / or in parallel to form a battery box, which is then used to form a battery cluster 100, and a plurality of battery clusters 100 are connected in parallel to form an energy storage device.

[0082] In some embodiments, Figure 7 As shown, two adjacent battery clusters 100 are connected to each other by two wires to realize positive and negative connection, that is, two wires are used to replace the function of two copper bars.

[0083] In other embodiments, Figure 8As shown, the conductor 1 of the wire includes a first conductive layer 12, a second conductive layer 13 and an insulating separation layer 14. The specific configuration of the three is described above. The first conductive layer 12 is connected to the positive electrodes of two adjacent battery clusters 100, and the second conductive layer 13 is connected to the negative electrodes of two adjacent battery clusters 100. This configuration enables the positive and negative electrodes of two adjacent battery clusters 100 to be connected through one wire, that is, one wire replaces the function of two copper bars, which saves costs, has high integration, and is economical.

[0084] 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 conductor, characterized in that: Suitable for connecting between adjacent battery clusters (100), the wire comprises: An electrical conductor (1), wherein a cooling channel (11) suitable for carrying a cooling liquid is arranged inside the electrical conductor (1), one end of the cooling channel (11) has a liquid inlet, and the other end of the cooling channel (11) has a liquid outlet, and the cooling liquid flows into the cooling channel (11) from the liquid inlet and flows out from the liquid outlet; An insulator (2) is coated on the outer periphery of the conductor (1).

2. The wire according to claim 1, characterized in that: The conductor (1) comprises: A first conductive layer (12) adapted to be connected to the positive electrodes of two adjacent battery clusters (100); A second conductive layer (13) adapted to be connected to the negative electrodes of two adjacent battery clusters (100); An insulating separation layer (14) is arranged between the first conductive layer (12) and the second conductive layer (13).

3. The wire according to claim 2, characterized in that: The first conductive layer (12) is in the shape of an elongated strip and has a first opening facing the side, the second conductive layer (13) is in the shape of an elongated strip and has a second opening facing the side, the first opening of the first conductive layer (12) and the second opening of the second conductive layer (13) are butted together along a direction perpendicular to the extension direction of the conductor (1), so that the first conductive layer (12) and the second conductive layer (13) enclose the cooling channel (11), and the insulating separation layer (14) is arranged at the butt joint between the first conductive layer (12) and the second conductive layer (13).

4. The wire according to claim 3, characterized in that: The cooling channel (11) comprises a first channel (111) and a second channel (112); the insulating separation layer (14) is located between the first channel (111) and the second channel (112); the insulating separation layer (14) and the first conductive layer (12) cooperate to form the first channel (111); and the insulating separation layer (14) and the second conductive layer (13) cooperate to form the second channel (112).

5. The wire according to claim 3, characterized in that: The inner surface of the insulating separation layer (14) is flush with the inner surfaces of the first conductive layer (12) and the second conductive layer (13) or is arranged to protrude toward the center of the conductive wire, and the outer surface of the insulating separation layer (14) is flush with the outer surfaces of the first conductive layer (12) and the second conductive layer (13) or is arranged to protrude away from the center of the conductive wire.

6. The conductor according to any one of claims 3 to 5, characterized in that: The insulating separation layer (14) and the insulator (2) are integrally formed.

7. The conductor according to any one of claims 3 to 5, characterized in that: The conductor (1) further comprises: A first connection structure, used for sealingly connecting the insulating separation layer (14) and the first conductive layer (12); And / or, a second connection structure, used for sealingly connecting the insulating separation layer (14) and the second conductive layer (13).

8. The guide wire according to claim 7, characterized in that: The first connection structure comprises a first connection protrusion (121) and a first connection groove (141) that match each other, one of the first connection protrusion (121) and the first connection groove (141) being arranged on the insulating separation layer (14), and the other being arranged on the first conductive layer (12); and / or The second connection structure comprises a second connection protrusion (131) and a second connection groove (142) that match each other, wherein one of the second connection protrusion (131) and the second connection groove (142) is arranged on the insulating separation layer (14), and the other is arranged on the second conductive layer (13).

9. The guide wire according to claim 8, characterized in that A "labyrinth sealing structure" is formed between the first connecting protrusion (121) and the first connecting groove (141), and / or between the second connecting protrusion (131) and the second connecting groove (142).

10. An energy storage device, characterized in that: include: A battery cluster (100) formed by connecting a plurality of single batteries in series and / or in parallel; The conductive wire according to any one of claims 1 to 9, wherein the conductive wire is connected between two adjacent battery clusters (100).

11. The energy storage device according to claim 10, characterized in that: The conductor (1) of the wire comprises a first conductive layer (12), a second conductive layer (13) and an insulating separation layer (14); the insulating separation layer (14) is arranged between the first conductive layer (12) and the second conductive layer (13); the first conductive layer (12) is connected to the positive electrodes of two adjacent battery clusters (100); and the second conductive layer (13) is connected to the negative electrodes of two adjacent battery clusters (100).

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