Battery pack

Abstract

The utility model relates to the technical field of batteries, in particular to a battery pack which comprises at least two battery monomers, a busbar, an acquisition piece and a mounting seat, the busbar is used for realizing electric connection of at least two battery monomers; the acquisition piece comprises a body part and an acquisition branch part, one end of the acquisition branch part is connected to the body part, the other end is connected to the top of the battery monomer, and a temperature acquisition unit is arranged on one side opposite to the battery monomer; the mounting seat comprises a seat body and an extension arm, the seat body is connected to the busbar, one end of the extension arm is connected to the seat body, and the other end is connected to one side, back to the acquisition branch, of the temperature acquisition unit; and in the height direction of the battery monomers, one side, back to the battery monomers, of the extension arm is lower than one side, back to the battery monomers, of the seat body.

Description

Technical Field

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

[0002] In the existing design of the battery pack, the collecting branch of the collecting member is connected to the top of the battery cell, and a temperature collecting unit is arranged at the end of the collecting branch connected to the battery cell. However, under the vibration condition of the battery pack, relative displacement is likely to occur between the collecting member and the battery cell, affecting the connection reliability between the collecting branch and the battery, and easily causing the temperature collecting function of the battery pack to fail, resulting in thermal runaway of the battery pack. Summary of the Utility Model

[0003] A main object of the utility model is to overcome at least one defect of the above-mentioned existing technology, and provide a battery pack with a relatively firm relative assembly relationship between the temperature collecting unit and the battery cell.

[0004] To achieve the above object, the utility model adopts the following technical solutions:

[0005] According to one aspect of the utility model, a battery pack is provided, which includes at least two battery cells, a bus bar, a collecting member and a mounting seat; the bus bar is used to realize the electrical connection of at least two battery cells; the collecting member includes a main body part and a collecting branch, one end of the collecting branch is connected to the main body part, the other end is connected to the top of the battery cell and a temperature collecting unit is arranged on the side facing away from the battery cell; the mounting seat includes a seat body and an extension arm, the seat body is connected to the bus bar, one end of the extension arm is connected to the seat body, and the other end is connected to the side of the temperature collecting unit facing away from the collecting branch; wherein, along the height direction of the battery cell, the side of the extension arm facing away from the battery cell is lower than the side of the seat body facing away from the battery cell.

[0006] It can be seen from the above technical solutions that the advantages and positive effects of the battery pack proposed by the utility model are as follows:

[0007] The battery pack proposed by the present utility model includes at least two battery cells, a bus bar, a collecting member, and a mounting seat; one end of the collecting branch of the collecting member is connected to its main body portion, and the other end is connected to the top of the battery cell, and a temperature collecting unit is arranged on the side facing away from the battery cell; the mounting seat includes a seat body and an extension arm, the seat body is connected to the bus bar, one end of the extension arm is connected to the seat body, and the other end is connected to the side of the temperature collecting unit facing away from the collecting branch, and the side of the extension arm facing away from the battery cell is lower than the side of the seat body facing away from the battery cell. Through the above structural design, the present utility model can arrange the temperature collecting unit between the extension arm of the mounting seat and the collecting branch of the collecting member, so as to protect the temperature collecting unit. At the same time, the present utility model connects the seat body of the mounting seat to the bus bar, thereby realizing the relative fixation among the bus bar, the collecting member, and the temperature collecting unit, making the relative assembly relationship between the temperature collecting unit and the battery cell more firm, ensuring the effectiveness of the temperature collecting function of the battery pack, and avoiding thermal runaway of the battery pack. In addition, through the structural design of the height difference between the seat body and the extension arm on the side facing away from the battery cell, the present utility model can be suitable for the layout requirements of the scenario where there is a height difference between the bus bar and the temperature collecting position on the battery cell, and at the same time can improve the structural strength of the mounting seat. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] By considering the following detailed description of the preferred embodiments of the present utility model in conjunction with the accompanying drawings, various objectives, features, and advantages of the present utility model will become more obvious. The drawings are only exemplary diagrams of the present utility model and are not necessarily drawn to scale. In the drawings, the same reference numerals always represent the same or similar components. Among them:

[0009] Figure 1 is a partial three-dimensional structural schematic diagram of a battery pack shown according to an exemplary embodiment;

[0010] Figure 2 is Figure 1 a three-dimensional exploded schematic diagram of the partial structure shown;

[0011] Figure 3 is Figure 2 an enlarged schematic diagram of part A of

[0012] Figure 4 is Figure 2 a three-dimensional structural schematic diagram of the partial structure shown from another perspective.

[0013] The reference numerals are explained as follows:

[0014] 100. Battery cell;

[0015] 200. Bus bar;

[0016] 210. Battery connection part;

[0017] 220. Transition part;

[0018] 230. Mounting hole;

[0019] 300. Acquisition part;

[0020] 310. Body part;

[0021] 320. Acquisition branch;

[0022] 400. Mounting base;

[0023] 410. Base body;

[0024] 411. Mounting protrusion;

[0025] 412. Limiting flange;

[0026] 420. Extension arm;

[0027] 421. Accommodating groove;

[0028] 430. Sealing glue;

[0029] D min . Minimum distance. Detailed implementation manners

[0030] Typical embodiments embodying the features and advantages of the present utility model will be described in detail in the following description. It should be understood that the present utility model can have various variations in different embodiments, all of which do not depart from the scope of the present utility model, and the descriptions and drawings therein are for illustrative purposes in essence and are not used to limit the present utility model.

[0031] In the following description of different exemplary embodiments of the present utility model, reference is made to the accompanying drawings, which form a part of the present utility model, and in which different exemplary structures, systems, and steps for implementing various aspects of the present utility model are shown by way of example. It should be understood that other specific solutions of components, structures, exemplary devices, systems, and steps can be used, and structural and functional modifications can be made without departing from the scope of the present utility model. Moreover, although terms such as "above", "between", "inside", etc. may be used in this specification to describe different exemplary features and elements of the present utility model, these terms are used herein only for convenience, for example, according to the directions of the examples described in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional direction of the structure to fall within the scope of the present utility model.

[0032] Refer to Figure 1, which representatively shows a partial structural three-dimensional schematic diagram of the battery pack proposed by the present utility model, specifically showing the combined structure of some battery cells 100, busbars 200, acquisition components 300, and mounting seats 400. In this exemplary embodiment, the battery pack proposed by the present utility model is described by taking an in-vehicle battery as an example. It is easy for those skilled in the art to understand that, in order to apply the relevant designs of the present utility model to other types of battery devices, various modifications, additions, substitutions, deletions, or other changes are made to the following specific embodiments, and these changes are still within the scope of the principle of the battery pack proposed by the present utility model.

[0033] As Figure 1 shown, in an embodiment of the present utility model, the battery pack proposed by the present utility model includes at least two battery cells 100, busbars 200, acquisition components 300, and mounting seats 400. With reference to Figures 2 to 4 , Figure 2 representatively shows Figure 1 a three-dimensional exploded schematic diagram of the partial structure shown in Figure 3 wherein the battery cell 100, the acquisition component 300, and the mounting seat 400 are separated along the height direction (for example, the axial direction of the battery cell 100); Figure 2 representatively shows an enlarged schematic diagram of part A in Figure 4 wherein representatively shows Figure 2 a three-dimensional structural schematic diagram of the partial structure shown in

[0034] As Figures 1 to 4As shown, in an embodiment of the present utility model, the bus bar 200 is used to realize the electrical connection of at least two battery cells 100. The acquisition member 300 includes a main body portion 310 and an acquisition branch portion 320. One end of the acquisition branch portion 320 is connected to the main body portion 310, and the other end of the acquisition branch portion 320 is connected to the top of the battery cell 100. And a temperature acquisition unit is provided on the side of the other end of the acquisition branch portion 320 facing away from the battery cell 100. The mounting seat 400 includes a seat body 410 and an extension arm 420. The seat body 410 is connected to the bus bar 200. One end of the extension arm 420 is connected to the seat body 410, and the other end of the extension arm 420 is connected to the side of the temperature acquisition unit facing away from the acquisition branch portion 320. Wherein, along the height direction of the battery cell 100, the side of the extension arm 420 facing away from the battery cell 100 is lower than the side of the seat body 410 facing away from the battery cell 100. Through the above structural design, the present utility model can arrange the temperature acquisition unit between the extension arm 420 of the mounting seat 400 and the acquisition branch portion 320 of the acquisition member 300, so as to realize the protection of the temperature acquisition unit. At the same time, the present utility model connects the seat body 410 of the mounting seat 400 to the bus bar 200, thereby realizing the relative fixation among the bus bar 200, the acquisition member 300 and the temperature acquisition unit, making the relative assembly relationship between the temperature acquisition unit and the battery cell 100 more firm, ensuring the effectiveness of the temperature acquisition function of the battery pack, and avoiding thermal runaway of the battery pack. In addition, through the structural design of the height difference between the seat body 410 and the extension arm 420 on the side facing away from the battery cell 100, the present utility model can be suitable for the layout requirements of the scenario where there is a height difference between the bus bar 200 and the temperature acquisition position on the battery cell 100, and at the same time can improve the structural strength of the mounting seat 400.

[0035] As Figures 2 to 4 shown, in an embodiment of the present utility model, an installation protrusion 411 may be provided at the bottom of the seat body 410, and an installation hole 230 may be provided on the bus bar 200. The installation protrusion 411 is in snap-fit connection with the installation hole 230, thereby realizing the fixed connection between the base and the bus bar 200. Through the above structural design, the present utility model can improve the connection reliability between the fixed seat and the bus bar 200, and further ensure the effectiveness of the temperature acquisition function of the battery pack. In some embodiments, the seat body 410 of the mounting seat 400 may also be fixedly connected to the bus bar 200 in other ways. For example, the seat body 410 and the bus bar 200 may also be adhesively connected, and it is not limited to this embodiment.

[0036] As Figures 2 to 4As shown, based on the structural design in which the base body 410 is provided with mounting protrusions 411 and the bus bar 200 is provided with mounting holes 230, in an embodiment of the present utility model, at least two (such as but not limited to the two shown in the drawings) mounting protrusions 411 may be provided at the bottom of the base body 410, and the at least two mounting protrusions 411 are arranged at intervals. The bus bar 200 is provided with at least two (such as but not limited to the two shown in the drawings) mounting holes 230, and the at least two mounting holes 230 are arranged at intervals. The mounting protrusions 411 and the mounting holes 230 are arranged in one-to-one correspondence. Through the above structural design, the present utility model can further improve the connection reliability between the fixing seat and the bus bar 200.

[0037] As Figures 1 to 4 As shown, based on the structural design in which the base body 410 is provided with mounting protrusions 411 and the bus bar 200 is provided with mounting holes 230, in an embodiment of the present utility model, the bus bar 200 may have at least two battery connection parts 210 and at least one transition part 220. The at least two battery connection parts 210 are respectively connected to at least two adjacent battery cells 100, and the transition part 220 is connected between the two battery connection parts 210. On this basis, the base body 410 can be connected to the transition part 220. In other words, the mounting holes 230 may be provided in the transition part 220 of the bus bar 200 and not in the battery connection part 210. Through the above structural design, the present utility model can avoid opening holes in the part where the bus bar 200 is connected to the battery cell 100 (i.e., the battery connection part 210), thereby ensuring the electrical connection function between the bus bar 200 and the battery cell 100 and avoiding affecting the current-carrying function of the bus bar 200.

[0038] Based on the structural design in which the bus bar 200 is provided with mounting holes 230, in an embodiment of the present utility model, for a bus bar 200, whether it is provided with one or more than two mounting holes 230, the proportion of the total area of all the mounting holes 230 of the bus bar 200 in the total area of the bus bar 200 may be 0.5% - 10%, such as 0.5%, 1%, 2%, 5%, 10%, etc. Through the above structural design, the present utility model can avoid the occupied area of the mounting holes 230 in the bus bar 200 being too small to affect the fixed connection of the mounting seat 400, and at the same time can avoid the occupied area of the mounting holes 230 in the bus bar 200 being too large to affect the current-carrying performance of the bus bar 200. In some embodiments, the proportion of the total area of all the mounting holes 230 of the bus bar 200 in the total area of the bus bar 200 may also be less than 0.5% or greater than 10%, such as 0.49%, 10.05%, etc., and is not limited to this embodiment.

[0039] As Figure 3As shown, based on the structural design with mounting holes 230 provided on the busbar 200, the minimum distance D between the edge of the mounting hole 230 and the edge of the busbar 200 min can be greater than or equal to 1.5 mm. Through the above structural design, the utility model can prevent the edge area of the busbar 200 from melting due to excessive heat generation caused by overcurrent.

[0040] As Figure 4 shown, based on the structural design with mounting protrusions 411 provided on the seat body 410 and mounting holes 230 provided on the busbar 200, in an embodiment of the utility model, a limiting flange 412 can be provided at the edge of the bottom of the seat body 410, and the limiting flange 412 is located outside at least one edge of the busbar 200. The limiting flange 412 can horizontally limit the mounting seat 400 and the busbar 200. It should be noted that when the busbar 200 includes a battery connection part 210 and a transition part 220, the edge of the above busbar 200 can be understood as the edge of the busbar 200 on the transition part 220, or it can also be understood that when there is a height difference in the height direction between the transition part 220 and the battery connection part 210 to form a step, this step can also be the above-mentioned edge. Through the above structural design, the utility model can further improve the assembly stability of the mounting seat 400 and the busbar 200, and further avoid relative displacement between the two, which affects the assembly firmness of the temperature acquisition unit and the battery cell 100.

[0041] In an embodiment of the utility model, the material of the mounting seat 400 can include PC and ABS. In some embodiments, other types of insulating materials can also be selected for the material of the mounting seat 400. Or, without specifically limiting the material of the mounting seat 400, its insulation performance can also be characterized by the magnitude of the leakage current shown under the breakdown test. For example, the leakage current of the material of the mounting seat 400 is less than 1 mA under a 1000 V DC voltage. Through the above design, since the mounting seat 400 may come off under the vibration condition of the battery pack, by using a material with insulating performance for the mounting seat 400, the utility model can further ensure the insulation effect of the battery pack.

[0042] As Figure 4 shown, in an embodiment of the utility model, a receiving groove 421 can be provided on the side of the extension arm 420 facing the battery cell 100, and the receiving groove 421 and the acquisition branch 320 together form a receiving chamber. On this basis, the temperature acquisition unit can be received and fixed in the receiving groove 421 via a sealant 430, and the sealant 430 fills the receiving groove 421 (i.e., the receiving chamber). Through the above structural design, the utility model can further strengthen the fixing effect of the temperature acquisition unit by using the sealant 430, and further ensure the assembly firmness of the temperature acquisition unit and the battery cell 100.

[0043] As Figure 4 shown, based on the structural design that the temperature acquisition unit is accommodated and fixed in the accommodation groove 421 via the sealant 430, in an embodiment of the present invention, the accommodation groove 421 can penetrate the extension arm 420 along the height direction of the battery cell 100, that is, the accommodation groove 421 opens at the top of the other end of the extension arm 420 (i.e., the side facing away from the battery cell 100), thereby exposing the sealant 430. Through the above structural design, the present invention can utilize the accommodation groove 421 as the injection port of the sealant 430. At the same time, due to the existence of the accommodation groove 421, the present invention can improve the heat dissipation performance of the temperature acquisition unit, and avoid the situation that the temperature acquisition unit is completely accommodated in a relatively closed accommodation chamber and is difficult to dissipate heat, which affects the accuracy of collecting the temperature information of the battery cell 100.

[0044] Based on the structural design that the temperature acquisition unit is accommodated and fixed in the accommodation groove 421 via the sealant 430, in an embodiment of the present invention, the material of the sealant 430 can be epoxy resin.

[0045] It should be noted here that the battery packs shown in the drawings and described in this specification are only a few examples of the many battery packs that can adopt the principles of the present invention. It should be clearly understood that the principles of the present invention are by no means limited to any details of the battery packs shown in the drawings or described in this specification or any components of the battery packs.

[0046] In summary, the battery pack proposed by the present utility model includes at least two battery cells 100, a bus bar 200, a collecting member 300, and a mounting seat 400; one end of the collecting branch 320 of the collecting member 300 is connected to its main body portion 310, and the other end is connected to the top of the battery cell 100, and a temperature collecting unit is provided on the side facing away from the battery cell 100; the mounting seat 400 includes a seat body 410 and an extension arm 420, the seat body 410 is connected to the bus bar 200, one end of the extension arm 420 is connected to the seat body 410, and the other end is connected to the side of the temperature collecting unit facing away from the collecting branch 320, and the side of the extension arm 420 facing away from the battery cell 100 is lower than the side of the seat body 410 facing away from the battery cell 100. Through the above structural design, the present utility model can arrange the temperature collecting unit between the extension arm 420 of the mounting seat 400 and the collecting branch 320 of the collecting member 300, so as to protect the temperature collecting unit. At the same time, the present utility model connects the seat body 410 of the mounting seat 400 to the bus bar 200, thereby realizing the relative fixation among the bus bar 200, the collecting member 300, and the temperature collecting unit, making the relative assembly relationship between the temperature collecting unit and the battery cell 100 more firm, ensuring the effectiveness of the temperature collecting function of the battery pack, and avoiding the thermal runaway of the battery pack. In addition, through the structural design of the height difference between the seat body 410 and the extension arm 420 on the side facing away from the battery cell 100, the present utility model can be suitable for the layout requirements of the scenario where there is a height difference between the bus bar 200 and the temperature collecting position on the battery cell 100, and at the same time can improve the structural strength of the mounting seat 400.

[0047] The above has described and / or illustrated in detail the exemplary embodiments of the battery pack proposed by the present utility model. However, the embodiments of the present utility model are not limited to the specific embodiments described herein. On the contrary, each component and / or step of each embodiment can be used independently and separately from the other components and / or steps described herein. Each component and / or each step of one embodiment can also be combined with the other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "a", "an", and "the above" etc. are used to indicate the existence of one or more elements / components / etc. The terms "comprising", "including", and "having" are used to mean an open inclusion and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc. In addition, the terms "first" and "second" etc. in the claims and the specification are only used as labels and are not numerical limitations on their objects.

[0048] Although the battery pack proposed by the present utility model has been described according to different specific embodiments, those skilled in the art will recognize that modifications can be made to the implementation of the present utility model within the spirit and scope of the claims.

Claims

1. A battery pack, characterized in that: include: At least two battery cells; A busbar, used to realize electrical connection between at least two of the battery cells; A temperature collecting member, comprising a main body and a temperature collecting branch, wherein one end of the temperature collecting branch is connected to the main body, and the other end is connected to the top of the battery cell, and a temperature collecting unit is arranged on a side facing away from the battery cell; as well as The mounting base includes a base body and an extension arm, wherein the base body is connected to the bus, one end of the extension arm is connected to the base body, and the other end is connected to a side of the temperature collection unit facing away from the collection branch; wherein, along the height direction of the battery cell, the side of the extension arm facing away from the battery cell is lower than the side of the base body facing away from the battery cell.

2. The battery pack according to claim 1, characterized in that: The bottom of the seat body is provided with a mounting protrusion, the bus bar is provided with a mounting hole, and the mounting protrusion is snap-fitted with the mounting hole.

3. The battery pack according to claim 2, characterized in that: The base body is provided with at least two mounting protrusions at the bottom, and the at least two mounting protrusions are arranged at intervals. The bus is provided with at least two mounting holes, and the at least two mounting holes are arranged at intervals. The mounting protrusions are arranged in one-to-one correspondence with the mounting holes.

4. The battery pack according to claim 2, characterized in that: The busbar has at least two battery connecting parts and at least one transition part, wherein the at least two battery connecting parts are respectively connected to at least two adjacent battery cells, and the transition part is connected between the two battery connecting parts; wherein the seat is connected to the transition part.

5. The battery pack according to claim 4, characterized in that: For one busbar, the sum of the areas of all the mounting holes accounts for 0.5% to 10% of the total area of ​​the busbar.

6. The battery pack according to claim 2, characterized in that: The minimum distance between the edge of the mounting hole and the edge of the busbar is greater than or equal to 1.5 mm; and / or The edge of the bottom of the seat body is provided with a limiting flange, and the limiting flange is located outside at least one edge of the bus bar, so as to horizontally limit the mounting seat and the bus bar.

7. The battery pack according to claim 1, characterized in that: The seat body is adhesively connected to the busbar.

8. The battery pack according to claim 1, characterized in that: The insulation performance of the material of the mounting base is such that the leakage current is less than 1 mA at a DC voltage of 1000 V.

9. The battery pack according to any one of claims 1 to 8, characterized in that: A receiving groove is provided on the other end of the extension arm facing the battery cell. The temperature collection unit is received and fixed in the receiving groove via a sealant, and the sealant fills the receiving groove.

10. The battery pack according to claim 9, characterized in that: The accommodating groove penetrates the extending arm along the height direction of the battery unit, and the accommodating groove opens at a side of the other end of the extending arm away from the battery.

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