Voltage balancing jig and voltage balancing device

Abstract

The utility model provides a voltage balancing jig and a voltage balancing device. The embodiment of the utility model provides a voltage balancing jig which is used for balancing the voltage of a plurality of single batteries in energy storage equipment, the voltage balancing jig comprises a base and a balancing assembly, and the base is detachably connected with the energy storage equipment. The balancing assembly is configured to be electrically coupled with a single battery of the energy storage equipment, and the balancing assembly is movably connected to the base in the first direction and used for being selectively and electrically coupled with any single battery of the energy storage equipment. Another embodiment of the utility model provides a voltage balancing device which comprises the voltage balancing jig and a voltage balancing instrument, and the balancing assembly is electrically coupled with the balancing assembly of the voltage balancing instrument.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of voltage equalization, in particular to a voltage equalization tool and a voltage equalization device. BACKGROUND

[0002] Currently, some energy storage devices use electrochemical energy storage. However, electrochemical energy storage has the problem that the difference in electrochemical performance inside the battery cell will become larger and larger as the charging and discharging time increases. The difference in electrochemical performance inside the battery cell mainly manifests as a larger and larger voltage difference between the battery cells, and the occurrence of a large voltage difference will lead to a decrease in charging and discharging efficiency of the device. CONTENT OF THE UTILITY MODEL

[0003] In order to solve the problem of low discharging efficiency caused by a large voltage difference between battery cells of an energy storage device, the present application provides a voltage equalization tool and a voltage equalization device for equalizing the voltage of battery cells.

[0004] The present application provides a voltage equalization tool for equalizing the voltage of a plurality of single batteries in an energy storage device. The voltage equalization tool comprises a base and an equalization assembly, and the base is detachably connected to the energy storage device. The equalization assembly is configured to be electrically coupled to the single batteries of the energy storage device. The equalization assembly is movably connected to the base in a first direction, and is configured to selectively electrically couple to any one of the single batteries of the energy storage device.

[0005] It can be understood that the base detachably connected to the energy storage device allows the voltage equalization tool to be connected to different energy storage devices according to the situation, and the connection is firm and reliable, and the voltage equalization tool works well. The equalization assembly can be electrically coupled to the single batteries of the energy storage device, and can equalize the voltage of a plurality of single batteries in the energy storage device after being connected to the voltage equalization tool. In addition, the equalization assembly is movably connected to the base, and can be electrically coupled to any one of the single batteries of the energy storage device according to the actual situation to adjust the voltage of the single battery that needs to be adjusted in the energy storage device, so as to achieve the effect of equalizing the voltage of a plurality of single batteries in the energy storage device.

[0006] In one embodiment, the base is provided with an adjusting hole, the extending direction of the adjusting hole is at least parallel to the first direction, and the equalization assembly is at least partially slidably arranged in the adjusting hole.

[0007] In one embodiment, the voltage equalization tool further comprises a connecting assembly, and the equalization assembly is fixed relative to the base through the connecting assembly.

[0008] In an embodiment, the connecting assembly includes a base and a first connecting member, the base is slidably arranged in the adjusting hole along the first direction, the equalizing assembly is connected to the base, and the first connecting member movably connects the base and the pedestal for relatively fixing the base and the pedestal.

[0009] In an embodiment, the equalizing assembly is movably connected to the base along a second direction for moving the equalizing assembly close to or away from the single battery, and the second direction intersects the first direction.

[0010] In an embodiment, the equalizing assembly includes a first equalizing member, the base is provided with a through hole, and the first equalizing member is at least partially movably arranged in the through hole along the second direction, and the first equalizing member is configured to be electrically coupled with the positive or negative pole of the single battery.

[0011] In an embodiment, the equalizing assembly further includes a second equalizing member, one end of the second equalizing member is detachably connected to the first equalizing member, and the second equalizing member is electrically coupled with the first equalizing member, and the other end of the second equalizing member is provided with a plurality of protrusions.

[0012] In an embodiment, the number of the equalizing assemblies is two, and the two equalizing assemblies are respectively electrically coupled with the positive and negative poles of the same single battery.

[0013] In an embodiment, the voltage equalization tool further includes a mounting assembly, and the pedestal is detachably connected to the energy storage device through the mounting assembly.

[0014] Another embodiment of the present application provides a voltage equalization device, which includes the voltage equalization tool and the voltage equalization instrument, and the equalizing assembly of the voltage equalization tool is electrically coupled with the voltage equalization instrument.

[0015] It can be understood that the voltage equalization device, in which the voltage equalization tool is electrically coupled with the voltage equalization instrument, can adjust the voltage of the single batteries in the energy storage device, so that the voltage of the single batteries in the energy storage device can be equalized. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 A perspective view of the voltage equalization tool according to an embodiment of the present application is shown.

[0017] Figure 2 An exploded view of the voltage equalization tool according to an embodiment of the present application is shown.

[0018] Figure 3 A perspective view of the voltage equalization tool connected to the energy storage device according to an embodiment of the present application is shown.

[0019] Figure 4 A perspective view of the connection between the equalization component and the connection component of the voltage equalization tool according to an embodiment of the present application.

[0020] Figure 5 A bottom view of the second equalization component of the voltage equalization tool according to an embodiment of the present application.

[0021] Figure 6 A perspective view of the voltage equalization device according to another embodiment of the present application.

[0022] Figure 7 A perspective view of the connection between the voltage equalization device and the energy storage device according to another embodiment of the present application.

[0023] Explanation of main element symbols:

[0024] 100, voltage equalization tool; 1, base; 10, adjusting hole; 2, equalization component; 21, first equalization component; 22, second equalization component; 220, protrusion; 3, connection component; 31, base; 310, through hole; 32, first connection component; 4, mounting component; 41, mounting component; 42, second connection component; 43, third connection component; 44, pad; 45, protection component; 200, voltage equalization tool; 300, energy storage device; 301, single battery; 302, energy storage box; X, first direction; Z, second direction; Y, third direction.

[0025] The following detailed description will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0026] The following description will refer to the accompanying drawings, which are meant to be exemplary embodiments of the present application. However, the application can be embodied in many different forms and should not be construed as limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. Like reference numerals refer to like elements throughout. The terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting of the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Furthermore, to the extent that the terms "including", "includes", "having", "has", "a", "an", "one" or "said" are used in this specification and / or claims, they are intended to be inclusive (meaning that there can be additional items) and / or they are intended to be quantitatively-satisfied by at least the recited members, unless explicitly indicated to the contrary. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure, and will not be interpreted in an overly literal or overly formal sense unless expressly so defined herein.

[0027] An embodiment of the present application provides a voltage equalization jig 100, as shown in Figures 1 to 3 for equalizing voltages of a plurality of single batteries 301 in an energy storage device 300. The single battery 301 is an electrochemical structure that can perform charging operation or discharging operation, such as a lithium battery. The energy storage device 300 includes a plurality of single batteries 301 and an energy storage box 302, the plurality of single batteries 301 are installed in the energy storage box 302, and the plurality of single batteries 301 can improve the energy storage capacity of the energy storage device 300 through series electrical coupling.

[0028] The voltage equalization jig 100 includes a base 1 and an equalization assembly 2, the base 1 is detachably connected with the energy storage box 302 of the energy storage device 300. The equalization assembly 2 is configured to be electrically coupled with the single battery 301 of the energy storage device 300, and the equalization assembly 2 is movably connected with the base 1 along a first direction X, for selectively electrically coupled with any one of the single batteries 301 of the energy storage device 300.

[0029] For the convenience of subsequent reading, the first direction X, the second direction Z and the third direction Y are introduced to describe the embodiments of the present application. The first direction X, the second direction Z and the third direction Y can be three mutually non-parallel straight line directions in space; further, the first direction X, the second direction Z and the third direction Y can be three mutually perpendicular directions in a three-dimensional coordinate system (three-dimensional Cartesian coordinate system). In the subsequent embodiments, the first direction X is taken as the X-axis direction of the coordinate axis of the three-dimensional coordinate system, the second direction Z is taken as the Z-axis direction of the coordinate axis of the three-dimensional coordinate system, and the third direction Y is taken as the Y-axis direction of the coordinate axis of the three-dimensional coordinate system.

[0030] In an embodiment, the number of equalization assemblies 2 is two, and the two equalization assemblies 2 are respectively electrically coupled to the positive and negative pole columns of the same single battery 301.

[0031] In the present embodiment, the equalization assembly 2 is electrically coupled to the positive and negative pole columns of the single battery 301 that needs to be adjusted, and the equalization assembly 2 is also electrically coupled to the external voltage equalization instrument 200, so as to adjust the voltage of the single battery 301 that needs to be adjusted through the voltage equalization instrument 200. The base 1 can be a beam, and the equalization assembly 2 can be a conductive pole column to realize the electrical coupling between the equalization assembly 2 and the single battery 301.

[0032] It can be understood that the base 1 detachably connected to the energy storage device 300 enables the voltage equalization jig 100 to be connected to different energy storage devices 300 according to the situation, and the connection is firm and reliable, and the voltage equalization jig 100 works well. Among them, the equalization assembly 2 can be electrically coupled to the single battery 301 of the energy storage device 300, and can play a role in equalizing the voltage of the plurality of single batteries 301 in the energy storage device 300 after being connected to the voltage equalization instrument 200. Moreover, the equalization assembly 2 is movably connected to the base 1, and can be electrically coupled to which single battery 301 of the energy storage device 300 according to the actual situation to realize the adjustment of the voltage of the single battery 301 that needs to be adjusted in the energy storage device 300, so as to realize the effect of equalizing the voltage of the plurality of single batteries 301 in the energy storage device 300.

[0033] In an embodiment, the base 1 is provided with an adjusting hole 10, and the extending direction of the adjusting hole 10 is at least parallel to the first direction X, and the equalization assembly 2 is at least partially slidably arranged in the adjusting hole 10.

[0034] In the embodiment, the projection shape of the adjusting hole 10 on the plane of the first direction X and the third direction Y along the second direction Z can be quadrilateral, specifically rectangular, and one side of the projection shape is parallel to the first direction X and the other side is parallel to the third direction Y, and the balancing assembly 2 can move along the first direction X in the adjusting hole 10. The projection shape of the adjusting hole 10 on the plane of the first direction X and the third direction Y can also be arc-shaped at both ends of the first direction X, which can match the shape of the balancing assembly 2.

[0035] It can be understood that the extending direction of the adjusting hole 10 is at least parallel to the first direction X so that the balancing assembly 2 can at least partially slide along the first direction X in the adjusting hole 10, and the position of the balancing assembly 2 can be adjusted to electrically couple the balancing assembly 2 with the two single batteries 301 that need to be adjusted.

[0036] In other embodiments, the projection shape of the adjusting hole 10 on the plane parallel to the first direction X and the third direction Y can also correspond to a plurality of connection positions of the balancing assembly 2 along the first direction X, and when the balancing assembly 2 is located at the connection position, the displacement of the balancing assembly 2 in the first direction X and the third direction Y is limited to achieve good connection of the balancing assembly 2 with the base 31.

[0037] It can be understood that the connection position can be provided for each single battery 301, and the balancing assembly 2 can be placed on the connection position corresponding to the single battery 301 that needs to be adjusted according to actual conditions to achieve voltage balancing of the single battery 301.

[0038] In an embodiment, the voltage balancing jig 100 further comprises a mounting assembly 4, and the base 1 is detachably connected to the energy storage box 302 of the energy storage device 300 through the mounting assembly 4.

[0039] It can be understood that the base 1 is detachably connected to the energy storage box 302 through the mounting assembly 4, so that the base 1 can be kept firm when it needs to work and is not affected by the adjustment of the balancing assembly 2.

[0040] In an embodiment, the mounting assembly 4 comprises a mounting member 41, a second connecting member 42, and a third connecting member 43, and the mounting member 41 is detachably connected to the energy storage box 302 through the second connecting member 42. The base 1 is detachably connected to the mounting member 41 through the third connecting member 43.

[0041] In the embodiment, the base 1 is spaced apart above the energy storage box 302 along the second direction Z. Along the first direction X, the length of the base 1 is greater than the length of the energy storage box 302, so that both ends of the base 1 exceed the energy storage box 302. The mounting assembly 4 is provided in two, and the opposite ends of the base 1 are detachably connected to the opposite sides of the energy storage box 302 through the two mounting assemblies 4 along the first direction X.

[0042] In the embodiment, the mounting member 41 can be a support, which is detachably connected with the energy storage device 300 through the second connecting member 42 along the first direction X, and the second connecting member 42 can be a bolt.

[0043] The mounting assembly 4 further comprises a cushion 44 and a protection member 45, the cushion 44 can be made of an insulating material, and the cushion 44 can be located between the mounting member 41 and the energy storage box 302 along the first direction X, so as to avoid the influence of the mounting member 41 on the electrical coupling between the balancing assembly 2 and the energy storage device 300. The protection member 45 can be arranged between the mounting member 41 and the cushion 44 along the first direction X, so that the protection member 45 can protect the cushion 44.

[0044] In an embodiment, the voltage balancing tool 100 further comprises a connecting assembly 3, and the balancing assembly 2 is relatively fixed with the base 1 through the connecting assembly 3.

[0045] It can be understood that after the balancing assembly 2 is adjusted in the adjusting hole 10, the balancing assembly 2 needs to be relatively fixed with the base 1 through the connecting assembly 3, so that the balancing assembly 2 will not move relative to the base 1 when it is used to balance the voltage in the future, and thus cannot balance the voltage of the corresponding single battery 301.

[0046] In an embodiment, as shown in Figure 4 The connecting assembly 3 comprises a base 31 and a first connecting member 32, the base 31 is slidably arranged in the adjusting hole 10 along the first direction X, the balancing assembly 2 is connected to the base 31, and the first connecting member 32 movably connects the base 31 and the base 1, so as to relatively fix the base 31 with the base 1.

[0047] In the embodiment, the number of the connecting assembly 3 is two, and the number of the adjusting hole 10 is two. The two adjusting holes 10 are arranged at intervals along the third direction Y. The bases 31 of the two connecting assemblies 3 are slidably arranged in the two adjusting holes 10, respectively. Correspondingly, the number of the balancing assembly 2 is two, and the two balancing assemblies 2 are connected to the bases 31 of the two connecting assemblies 3, respectively, so as to adjust the two balancing assemblies 2 to be electrically coupled with the positive and negative pole columns of the same single battery 301.

[0048] It can be understood that in other embodiments, the number of the connecting assembly 3 and the adjusting hole 10 can also be one, and the two balancing assemblies 2 are connected to the base 31 of the same connecting assembly 3, so as to realize the synchronous sliding of the two balancing assemblies 2.

[0049] In the embodiment, the base 31 is made of high-hardness insulating wear-resistant material to avoid affecting the electrical coupling between the balancing assembly 2 and the single battery 301. The base 31 is provided with a through hole 310, and the balancing assembly 2 is partially arranged through the through hole 310 to connect the balancing assembly 2 and the base 31. The outer circumferential surface of the balancing assembly 2 is abutted against the hole wall of the through hole 310 to limit the displacement of the balancing assembly 2 relative to the base 31 in the first direction X and the third direction Y.

[0050] The first connecting member 32 can be provided with two, respectively connected to both ends of the base 31 along the first direction X, and the first connecting member 32 can be selected as a fixed bolt. Along the second direction Z, the base 31 is located below the base 1, and the base 31 abuts the bottom end surface of the base 1. The stud of the first connecting member 32 is threadedly connected to the base 31 after passing through the through hole 310, and the nut end of the first connecting member 32 abuts the top end surface of the base 1, so as to realize the relative fixation of the base 31 and the base 1 by clamping the base 1 between the nut end of the first connecting member 32 and the base 31 to exert a larger friction force on them.

[0051] It can be understood that the through hole 310 provided on the base 31 can allow the balancing assembly 2 to pass through while allowing the balancing assembly 2 to be relatively fixed with the base 31 in the first direction X and the third direction Y, and the base 31 can also support part of the balancing assembly 2 to allow the balancing assembly 2 to move relative to the base 31 along the second direction Z.

[0052] In an embodiment, the balancing assembly 2 is movably connected to the base 31 along the second direction Z to allow the balancing assembly 2 to approach or move away from the single battery 301.

[0053] It can be understood that the balancing assembly 2 can move relative to the base 31 along the second direction Z to approach or move away from the single battery 301, so that the position of the balancing assembly 2 relative to the single battery 301 can be adjusted according to actual conditions. At the same time, the force exerted by the balancing assembly 2 on the single battery 301 can also be adjusted, so that the balancing assembly 2 can play a better role.

[0054] In an embodiment, the balancing assembly 2 includes a first balancing member 21, and the base 31 is provided with a through hole 310. Along the second direction Z, the first balancing member 21 is at least partially movably arranged in the through hole 310, and the first balancing member 21 is configured to be electrically coupled with the positive pole or the negative pole of the single battery 301.

[0055] In the embodiment, the first equalizing member 21 can be an electrode stud. The first equalizing member 21 can be electrically conductive and electrically coupled to the single battery 301. The first equalizing member 21 can be connected to a nut. The wire connecting the first equalizing member 21 and the voltage equalizing device 200 can be located between the nut and the top of the first equalizing member 21 to clamp the wire and provide a good and firm connection.

[0056] It can be understood that the first equalizing member 21 passes through the perforation 310 on the base 31 to achieve electrical coupling with the single battery 301. At the same time, the first equalizing member 21 is relatively fixed to the base 1 through the base 31, so that the first equalizing member 21 is relatively firm and reliable during operation.

[0057] In an embodiment, as shown in Figure 4 and Figure 5 , the equalizing assembly 2 further includes a second equalizing member 22. One end of the second equalizing member 22 is detachably connected to the first equalizing member 21, and the second equalizing member 22 is electrically coupled to the first equalizing member 21. The other end of the second equalizing member 22 is provided with a plurality of protrusions 220.

[0058] In the embodiment, the second equalizing member 22 can be an electrode stud cooperating with the first equalizing member 21 to achieve electrical coupling. At the same time, a bolt hole can be formed at the top of the second equalizing member 22. The first equalizing member 21 can be an electrode stud and can be threadedly connected to the second equalizing member 22 to achieve relative fixation of the first equalizing member 21 and the second equalizing member 22. The second equalizing member 22 can be a cylindrical structure, and its diameter can match that of the single battery 301. In the second direction Z, the second equalizing member 22 is provided with a plurality of protrusions 220 away from the end connected to the first equalizing member 21.

[0059] It can be understood that the first equalizing member 21 and the second equalizing member 22 are threadedly connected, so that the first equalizing member 21 can be adjusted to connect the first equalizing member 21 and the second equalizing member 22. When the second equalizing member 22 abuts against the single battery 301, the first equalizing member 21 can be further tightened to press the second equalizing member 22 tightly. The second equalizing member 22 is provided with a plurality of protrusions 220 at one end to increase the contact with the single battery 301, so that a larger charging and discharging current can be connected, the equalization time is reduced, and the equalization efficiency is improved.

[0060] Another embodiment of the present application provides a voltage equalization device, as shown in Figure 6 and Figure 7 , which includes the voltage equalization tool 100 and the voltage equalization device 200 as described above. The two equalizing assemblies 2 of the voltage equalization tool 100 are electrically coupled to the positive and negative wires of the voltage equalization device 200, respectively.

[0061] It can be understood that the voltage equalization device capable of electrically coupling the voltage equalization tool 100 and the voltage equalization instrument 200 is capable of adjusting the voltage of the plurality of single batteries 301 in the energy storage device 300, so that the voltage of the plurality of single batteries 301 in the energy storage device 300 can reach equalization.

[0062] In the foregoing, the specific embodiments of the present application are described with reference to the accompanying drawings. However, those skilled in the art can understand that various changes and replacements can be made to the specific embodiments of the present application without departing from the spirit and scope of the present application. These changes and replacements are within the scope defined by the present application.

Claims

1. A voltage equalization fixture for equalizing the voltage of multiple individual cells in an energy storage device, characterized in that, The voltage equalization fixture includes: A base that is detachably connected to the energy storage device; A balancing component, configured to be electrically coupled to a single cell of the energy storage device, is movably connected to the base along a first direction for selectively being electrically coupled to any one of the single cells of the energy storage device. A connecting component is provided, wherein the equalizing component is fixed relative to the base via the connecting component. The connecting component includes a base and a first connector, the first connector being movably connected to the base and the base for fixing the base relative to the base.

2. The voltage equalization fixture as described in claim 1, characterized in that, The base is provided with an adjustment hole, the extension direction of which is at least parallel to the first direction, and the equalization component is at least partially slidably disposed within the adjustment hole.

3. The voltage equalization fixture as described in claim 2, characterized in that, Along the first direction, the base is slidably disposed within the adjustment hole, and the equalization component is connected to the base.

4. The voltage equalization fixture as described in claim 3, characterized in that, Along a second direction, the equalization component is movably connected to the base for bringing the equalization component closer to or further away from the individual battery cell, the second direction intersecting the first direction.

5. The voltage equalization fixture as described in claim 4, characterized in that, The equalization component includes a first equalization element. The base has a through hole. Along the second direction, the first equalization element is at least partially movably disposed within the through hole. The first equalization element is configured to be electrically coupled to the positive or negative terminal of the single cell.

6. The voltage equalization fixture as described in claim 5, characterized in that, The equalization component further includes a second equalization element, one end of which is detachably connected to the first equalization element and electrically coupled to the first equalization element, and the other end of the second equalization element is provided with a plurality of protrusions.

7. The voltage equalization fixture as described in claim 1, characterized in that, The number of equalization components is set to two, and the two equalization components are used to electrically couple to the positive terminal and the negative terminal of the same single cell, respectively.

8. The voltage equalization fixture as described in claim 1, characterized in that, The voltage equalization fixture also includes a mounting assembly, through which the base is detachably connected to the energy storage device.

9. A voltage equalization device, characterized in that, Includes the voltage equalization fixture and voltage equalizer as described in any one of claims 1 to 8, wherein the equalization component of the voltage equalization fixture is electrically coupled to the voltage equalizer.

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