Busbar module for high-temperature sodium battery pack

Abstract

The utility model discloses a busbar module for a high-temperature sodium battery pack, which belongs to the technical field of integrated busbars and comprises an insulating block, and a first through groove, a second through groove and a fixing groove which are independent from one another are arranged on the insulating block. The first through groove, the second through groove and the fixing groove can be used for effectively fixing the positive conducting bar, the negative conducting bar and the low-voltage collecting wire harness, the short circuit phenomenon caused by contact of the positive electrode and the negative electrode is avoided, the needed insulation effect is achieved, and meanwhile the service life of the low-voltage collecting wire harness is prolonged. The first through groove, the second through groove and the fixing groove are respectively a through groove and a sinking groove which are arranged on the insulating block, so that the utilization efficiency of the insulating block is maximized, the compactness of the busbar module structure is improved, in addition, the output ends of the positive and negative conducting bars are connected with an external load circuit in a threaded fastening manner, and the reliability of the busbar module structure is improved. Therefore, the installation procedure of the busbar module is simplified, the busbar installation efficiency is improved, the heat dissipation efficiency can be improved, and certain market value is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of integrated busbars, and in particular relates to a busbar module for a high-temperature sodium battery pack. Background Art

[0002] The busbar is a copper or aluminum bar that connects the main switch and the switches in each branch circuit in the electrical cabinet. The busbar is mainly used as a conductor to achieve series and parallel connection between battery cells, and is an important component in battery assembly.

[0003] Sodium-sulfur batteries and sodium salt batteries have the advantages of high safety, high specific energy, high charge and discharge efficiency, and low cost. Both types of batteries are excellent electrochemical energy storage power sources.

[0004] The existing busbars for high-temperature sodium batteries are usually plugged into external loads, which not only requires high processing accuracy of the busbars, but also makes the installation operation complicated. At the same time, the plug-in method can easily cause a short circuit between the positive and negative busbars. In addition, the plug-in method will directly transfer heat to the external circuit, resulting in increased heat dissipation burden of the high-temperature sodium battery pack and the heat dissipation burden of the BMS module supporting the battery pack.

[0005] Based on the above analysis, this application designs a busbar module for sodium batteries that has a compact structure, is easy to install, has excellent insulation performance, and is more friendly to heat transfer to external loads. Summary of the invention

[0006] The utility model aims to provide a busbar module for a high-temperature sodium battery pack, which has a compact structure, is easy to install, and has good insulation performance, thereby solving at least one problem existing in the busbar for a high-temperature sodium battery mentioned in the background technology.

[0007] In order to solve the above problems, the present application provides a busbar module for a high-temperature sodium battery pack.

[0008] It comprises an insulating block, a locking block and positive and negative conductive bars, the insulating block is provided with a first through slot and a second through slot for installing the positive and negative conductive bars, and at the same time, the insulating block is provided with a fixing slot for fixing the low-voltage collection harness, the first through slot, the second through slot and the fixing slot all extend axially along the insulating block and are independent of each other; the locking block comprises a first locking block and a second locking block, the first locking block and the second locking block can be respectively nested in the first through slot and the second through slot to fix the positive and negative conductive bars, the output ends of the positive and negative conductive bars are provided with threaded holes, and the high-temperature sodium salt battery pack is connected to the external load circuit by threaded fastening.

[0009] As a preferred solution of the present application, the fixing groove is a sunken U-shaped groove arranged on the insulating block, and a detachable insulating pressure plate is provided at the upper opening of the fixing groove.

[0010] As a preferred solution of the present application, an embedding groove is provided on the outer edge of the upper opening of the fixing groove, the size of the embedding groove corresponds to the size of the insulating pressure plate, and the insulating pressure plate can be embedded in the embedding groove.

[0011] As a preferred solution of the present application, a locking ring is provided, which has a size corresponding to the insulating block and can be sleeved on the insulating block to press the insulating pressure plate into the embedding groove opened at the upper end of the fixing groove.

[0012] As a preferred solution of the present application, the insulating pressure plate and the locking ring are both made of mica.

[0013] As a preferred solution of the present application, the first through groove and the second through groove are arranged in the same direction on the insulating block and are through grooves arranged on the insulating block.

[0014] As a preferred solution of the present application, at least two groups of second through-grooves for mounting the negative electrode conductive bars are provided, and the two groups of second through-grooves are respectively provided on opposite sides of the insulating block.

[0015] As a preferred solution of the present application, the first locking block and the second locking block are embedded in the first through groove and the second through groove and are located on the inner side of the positive and negative conductive bars.

[0016] As a preferred embodiment of the present application, the positive electrode conductive bar and the negative electrode conductive bar are both "Z"-shaped nickel alloy sheets with a thickness of 0.9-1.1 mm.

[0017] Compared with the prior art, the advantages of the busbar module for the high-temperature sodium battery pack of the present application are: the busbar module includes an insulating block, and the insulating block is provided with a first through groove, a second through groove and a fixed groove which are independent of each other. The first through groove, the second through groove and the fixed groove can be used to effectively fix the positive and negative conductive bars and the low-voltage collection harness, thereby avoiding the occurrence of short circuit caused by the contact between the positive and negative electrodes and achieving the desired insulation effect. At the same time, the first through groove, the second through groove and the fixed groove are respectively a through groove and a sinking groove arranged on the insulating block, so that the utilization efficiency of the insulating block is maximized and the compactness of the busbar module structure is increased. In addition, the output ends of the positive and negative conductive bars are connected to the external load circuit by a threaded fastening method, which simplifies the busbar module installation procedure, improves the busbar installation efficiency, and can improve the heat dissipation efficiency. It can be seen that the busbar module of the present application can not only solve the deficiencies of the prior art, but also has the advantages of compact structure and convenient installation compared with the existing busbar, and therefore has a certain market value. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a busbar module for a high-temperature sodium battery pack provided by the utility model.

[0019] Figure 2 This is a schematic diagram of the exploded structure of the busbar module for the high-temperature sodium battery pack provided by the utility model.

[0020] Reference numerals

[0021] 1 is an insulating block, 21 is a first locking block, 22 is a second locking block, 31 is a first through slot, 32 is a second through slot, 4 is a fixing slot, 51 is a positive conductive bar, 52 is a negative conductive bar, 6 is an insulating pressure plate, 7 is an inlay slot, 8 is a locking ring, 9 is a threaded hole, and 10 is a connecting hole. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below in conjunction with specific implementations and with reference to the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope of the present invention and its application.

[0023] like Figure 1-2As shown, a busbar module for a high-temperature sodium battery pack provided in this embodiment, the busbar module comprises an insulating block 1, a locking block and positive and negative conductive bars (51, 52) (it can be understood that the positive and negative conductive bars (51, 52) should include positive conductive bars 51 and negative conductive bars 52), the insulating block 1 is a regular rectangular block structure, and its constituent material is preferably ceramic. In addition to the insulation advantage, the ceramic insulating block 1 also has the advantages of high temperature resistance, corrosion resistance and high mechanical strength, which meets the requirement of the high-temperature sodium battery in this embodiment to have an operating temperature of more than 285°C; a first through groove is provided on the insulating block 1 31, the second through groove 32 and the fixing groove 4, the first through groove 31 and the second through groove 32 are used to install the positive electrode conductive bar 51 and the negative electrode conductive bar 52, the positive electrode conductive bar 51 and the negative electrode conductive bar 52 adopt the existing traditional "Z" structure, the constituent material is 201 nickel alloy, and the thickness is 0.9-1.1mm, preferably 1mm, because the 201 nickel alloy has good current capacity and mechanical properties, setting it as a row structure improves its current capacity compared with the linear structure, it can be understood that the positive and negative electrode conductive bars (51, 52) should include a connection terminal connected to the high temperature sodium battery pack input terminal and a connection terminal connected to the load The output end of the circuit connection, in this embodiment, the output ends of the positive and negative conductive bars (51, 52) are preferably inserted into and extended to the first through slot 31 and the second through slot 32 respectively; the fixing slot 4 is used to fix the low-voltage collection harness in an orderly manner; the first through slot 31, the second through slot 32 and the fixing slot 4 all extend axially along the insulating block 1 and are independent and not connected to each other, thereby improving the insulation performance and avoiding short circuit between the positive and negative electrodes; the locking block includes a first locking block 21 and a second locking block 22, and the first locking block 21 and the second locking block 22 are both plate-like structures, which can be respectively nested in the first through slot 31 and The second through groove 32 is used to fix the output ends of the positive and negative conductive bars (51, 52) in the corresponding installation grooves. The specific fixing method is preferably an embedded interference fit fixation. In this embodiment, the first locking block 21 and the second locking block 22 are preferably embedded in the first through groove 31 and the second through groove 32 and are located on the inner side of the positive and negative conductive bars (51, 52), so as not to affect the normal connection between the output ends of the positive and negative conductive bars (51, 52) and the external circuit; it can be understood that the material constituting the locking block should also be a material with high temperature resistance and good insulation performance, specifically mica or nickel alloy.

[0024] In this embodiment, threaded holes 9 are provided at the output ends of the positive conductive bar 51 and the negative conductive bar 52. Bolts can be screwed into the threaded holes 9 and the positive conductive bar 51 and the negative conductive bar 52, that is, the high-temperature sodium salt battery pack, are connected to the external load circuit by threaded fastening. Since the thickness of the conductive bar is relatively thin, it is impossible to effectively connect to the external circuit by only using the threaded holes 9 provided on the conductive bar. Therefore, in this embodiment, connection holes 10 corresponding to the threaded holes 9 are preferably provided on the first locking block 21 and the second locking block 22, respectively, and the bolts can be screwed into the connection holes 10 through the threaded holes 9 to achieve a more reliable connection.

[0025] In this embodiment, the busbar module can be used for a plurality of strings and two parallel batteries, and in this embodiment, forty-four strings and two parallel sodium salt batteries are preferably used.

[0026] Depend on Figure 2 It can be seen that the first through slot 31 and the second through slot 32 are arranged in the same direction on the insulating block 1, and the cross section thereof is a ring-shaped or circular slot structure. The slot of this structure has better insulation performance than the U-shaped slot, and can increase the overall compactness of the busbar module; in this embodiment, at least two groups of second through slots 32 for installing the negative electrode conductive bar 52 are provided, and the two groups of second through slots 32 are respectively arranged on opposite sides of the insulating block 1, which is conducive to assembling the two parallel sodium salt battery packs and can also provide better insulation between the two parallel sodium salt battery packs; in this embodiment, the first through slot 31 for installing the positive electrode conductive bar 51 is preferably provided with only one group, and multiple connection holes are provided at the input end of the positive electrode conductive bar 51 to achieve connection with multiple total positive electrodes of the battery. In other embodiments of the present application, when used for multiple parallel battery packs, at least the second through slots 32 can be provided with corresponding multiple groups.

[0027] The fixing groove 4 is a sunken U-shaped groove arranged on the upper end surface and / or the lower end surface of the insulating block 1. The design number of the fixing groove 4 is determined according to the number of battery groups actually assembled. In this embodiment, the fixing groove 4 is preferably arranged on the upper end surface of the insulating block 1, and a removable insulating pressure plate 6 is provided at the upper opening of the fixing groove 4. The insulating pressure plate 6 is used to seal the upper opening of the fixing groove 4 to protect and limit the low-voltage collection harness. At the same time, it is used to form an insulating cavity with the fixing groove 4 to enhance the insulation performance of the busbar module. In this embodiment, the material constituting the insulating pressure plate 6 is preferably mica. Of course, it can also be other materials with good insulation and high temperature resistance such as ceramics.

[0028] An embedding groove 7 is provided on the outer edge of the upper opening of the fixing groove, i.e., the U-shaped groove. The size of the embedding groove 7 corresponds to the size of the insulating pressure plate 6. The insulating pressure plate 6 can be embedded in the embedding groove 7. This can increase the tightness and flatness of the contact between the insulating pressure plate 6 and the upper opening of the fixing groove, thereby improving the insulation performance of the busbar module.

[0029] A locking ring 8 is provided, which has a size corresponding to that of the insulating block 1 and can be sleeved on the insulating block 1 to press the insulating pressing plate 6 into the embedding groove 7 opened at the upper end of the fixing groove 4; in this embodiment, the locking ring 8 is preferably made of mica tape. In other embodiments of the present application, screwing or bonding can also be used for fixing.

[0030] In this embodiment, the mica constituting the locking ring 8 and the insulating pressure plate 6 is preferably muscovite. As a kind of natural inorganic mineral, muscovite has the advantages of insulation, high temperature resistance, stable performance, good thermal insulation, elasticity and toughness, and therefore meets the requirements of the embodiment.

[0031] This embodiment takes a 44-series, two-parallel sodium salt battery group (module) as an example to illustrate the specific use principle of the busbar module:

[0032] First, the input ends of the positive conductive bar 51 and the negative conductive bar 52 are connected to the total positive and total negative electrodes of the two parallel battery packs respectively by laser welding, and then the output ends of the positive conductive bar 51 and the negative conductive bar 52 are inserted into the corresponding through-slots and locked by the locking blocks. The low-voltage collection harness is arranged and fixed in the U-shaped groove, i.e., the fixing groove 4, by the insulating pressure plate 6 and the locking ring 8. At this time, the assembly of the two parallel battery packs is completed. Finally, the external load circuit is connected to the output ends of the positive and negative conductive bars (51, 52) by bolt fastening.

[0033] In summary, the busbar module for the high-temperature sodium battery pack of this embodiment can effectively fix the positive and negative conductive bars (51, 52) and the low-voltage collection harness by setting the first through groove 31, the second through groove 32 and the fixed groove 4 independently of each other on the insulating block 1, effectively avoiding the occurrence of short circuit caused by the contact between the positive and negative electrodes, and achieving the required insulation effect. At the same time, the first through groove 31, the second through groove 32 and the fixed groove 4 are respectively set on the insulating block 1. The utilization efficiency of the insulating block 1 is achieved, the volume of the busbar module is reduced, and the compactness of the busbar module structure is increased. In addition, the output ends of the positive and negative conductive bars are connected to the external load circuit by threaded fastening, which simplifies the busbar module installation procedure, improves the busbar installation efficiency, and can improve the heat dissipation efficiency. It can be seen that the busbar module of the present application can not only solve the shortcomings of the prior art, but also has the advantages of compact structure and convenient installation compared with the existing busbar, and therefore has a certain market value.

[0034] The above is only an embodiment of the utility model, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several improvements can be made without departing from the premise of the utility model, which should also be regarded as the protection scope of the utility model, and these will not affect the effect of the implementation of the utility model and the practicality of the patent. The scope of protection required by this application shall be based on the content of the claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. A busbar module for a high-temperature sodium battery pack, characterized in that: It comprises an insulating block, a locking block and positive and negative conductive bars, the insulating block is provided with a first through slot and a second through slot for installing the positive and negative conductive bars, and at the same time, the insulating block is provided with a fixing slot for fixing the low-voltage collection harness, the first through slot, the second through slot and the fixing slot all extend axially along the insulating block and are independent of each other; the locking block comprises a first locking block and a second locking block, the first locking block and the second locking block can be respectively nested in the first through slot and the second through slot to fix the positive and negative conductive bars, the output ends of the positive and negative conductive bars are provided with threaded holes, and the high-temperature sodium salt battery pack is connected to the external load circuit by threaded fastening.

2. The busbar module for a high-temperature sodium battery pack according to claim 1, characterized in that: The fixing groove is a sunken U-shaped groove arranged on the insulating block, and a detachable insulating pressing plate is arranged at the upper opening of the fixing groove.

3. The busbar module for a high-temperature sodium battery pack according to claim 2, characterized in that: An embedding groove is provided on the outer edge of the upper opening of the fixing groove. The size of the embedding groove corresponds to the size of the insulating pressing plate. The insulating pressing plate can be embedded in the embedding groove.

4. The busbar module for a high-temperature sodium battery pack according to claim 2, characterized in that: A locking ring is provided, which has a size corresponding to that of the insulating block and can be sleeved on the insulating block to press the insulating pressing plate into an inlay groove opened at the upper end of the fixing groove.

5. The busbar module for a high-temperature sodium battery pack according to claim 4, characterized in that: The insulating pressing plate and the locking ring are both made of mica.

6. The busbar module for a high-temperature sodium battery pack according to claim 1, characterized in that: The first through groove and the second through groove are arranged in the same direction on the insulating block and are through grooves arranged on the insulating block.

7. The busbar module for a high-temperature sodium battery pack according to claim 1, characterized in that: At least two groups of second through-grooves for mounting the negative electrode conductive bar are provided, and the two groups of second through-grooves are respectively provided on opposite sides of the insulating block.

8. The busbar module for a high-temperature sodium battery pack according to claim 1, characterized in that: The first locking block and the second locking block are embedded in the first through slot and the second through slot and are located on the inner side of the positive and negative conductive bars.

9. The busbar module for a high-temperature sodium battery pack according to claim 1, characterized in that: The positive electrode conductive bar and the negative electrode conductive bar are both "Z"-shaped nickel alloy sheets with a thickness of 0.9-1.1 mm.

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