Battery module cover plate, conducting bar and battery module

Abstract

The utility model belongs to the technical field of electrochemical battery inactive parts, and particularly provides a battery module cover plate, a conducting bar and a battery module. The battery module cover plate is provided with a first through hole and a second through hole which are used for the binding piece to pass through, the conducting bar is provided with a bent bulge, and the bent bulge is provided with a third through hole which is used for the binding piece to pass through. The battery module comprises the battery module cover plate, a conducting bar and a binding piece, wherein the binding piece penetrates through the first through hole, the second through hole and the third through hole to bind and connect the cover plate and the conducting bar. The cover plate can keep a stable state under the action of the binding piece. In addition, the binding piece can also provide inward holding force for the folded edges, and the folded edges are prevented from being warped up due to release of bending stress. The binding piece does not directly contact with the battery cell, and the aging speed is slow, so that the scheme that the cover plate and the conducting bar are connected through the binding piece has better reliability.

Description

Technical Field

[0001] The utility model belongs to the technical field of inactive components of electrochemical batteries, and particularly relates to a battery module cover plate, a conductive row and a battery module. Background Art

[0002] Energy storage battery modules generally include several battery cells, collection harnesses, conductive bars, cover plates, etc. Several battery cells are fixed together by means of adhesive or strapping, and two adjacent battery cells are electrically connected by conductive bars. The collection harness is connected to the conductive bars (riveted, bolted, welded, etc.), and information such as the temperature and voltage of the battery cells can be collected. The cover plate is generally made of PC material formed by heat bending, including a cover plate body and a folded edge provided on the cover plate body, and is connected to the battery module through the folded edge. While playing a protective role, it can also form a relatively closed space to reduce the impact of external air flow on temperature collection.

[0003] In the prior art, the cover plate is generally made by bonding the folded edge and the side of the battery cell together with adhesive. However, the charging and discharging process of the battery cell will generate a certain amount of heat, which will accelerate the aging of the adhesive and cause the cover plate to expand and deform slightly. At the same time, in addition to the vibration impact load during transportation and use, the folded edge is also subject to the bending stress at its own bend. With the release of the bending stress and the superposition of the vibration load, the folded edge is easy to warp to one side during long-term use and separate from the battery module. External air can easily enter the enclosed space surrounded by the cover plate, increasing the error of the temperature collection result and insufficient reliability.

[0004] After analysis, it is known that the solution of bonding the cover plate and the battery cell only by adhesive is difficult to meet the long-term reliable use of the battery module, and the reliability of the battery module still has room for improvement. Utility Model Content

[0005] The purpose of the utility model is to provide a battery module cover plate to solve the technical problem that the prior art only uses adhesive to bond the cover plate and the battery cell, which is difficult to meet the long-term reliable use of the battery module. The purpose of the utility model is also to provide a conductive bar to solve the same technical problem. The purpose of the utility model is also to provide a battery module including the conductive bar and the battery cover plate to solve the same technical problem.

[0006] To achieve the above purpose, the technical solution of the battery module cover provided by the utility model is:

[0007] A battery module cover plate comprises a cover plate body, wherein the cover plate body is provided with two or more folded edges arranged opposite to each other for binding with a conductive bar, the folded edge is provided with a first through hole for an insulating binding piece to pass through, the cover plate body is provided with a second through hole for an insulating binding piece to pass through, or the folded edge is provided with a first through hole and a second through hole for a binding piece to pass through, the first through hole and the second through hole are used to correspond and cooperate with a third through hole provided on the conductive bar of the battery module to allow the same insulating binding piece to pass through.

[0008] As a further improvement, the contact surface of the folded edge for contacting the battery core is also provided with an adhesive portion for bonding adhesive.

[0009] The beneficial effects of the utility model are as follows: the utility model belongs to an improved invention. Specifically, when assembling into a battery module, the cover plate can be first buckled on the battery module formed by several battery cells that have been assembled and connected, and then the cover plate and the conductive bar are tied and connected by using a binding piece through the first perforation, the second perforation and the third perforation of the conductive bar. After the binding piece is tied, the conductive bar is equivalent to the connection basis between the cover plate and the battery module. In the up and down and left and right directions, the binding piece can play a role in limiting the position of the cover plate. In this way, no matter which direction the load and bending stress are applied, the binding piece can stably limit the position of the cover plate. Moreover, the binding piece does not directly contact the battery cell, and the aging speed of the binding piece itself is much lower than that of general adhesive. Therefore, the scheme of the utility model that connects the cover plate and the conductive bar through the binding piece has better reliability and can meet the long-term reliable use of the battery module.

[0010] In order to achieve the above-mentioned purpose, the technical solution of the conductive bar provided by the utility model is:

[0011] A conductive bar comprises a connection end for connecting to a pole of a battery cell, a bending protrusion is provided on the conductive bar, the bending protrusion is provided with a third through-hole for an insulating binding piece to pass through, and the third through-hole is used to correspond to a first through-hole and a second through-hole provided on a cover plate of a battery module to allow the same insulating binding piece to pass through.

[0012] As a further improvement, the bending protrusion is arranged between two connection ends of the conductive bar for connecting with different battery cells.

[0013] As a further improvement, a terminal mounting portion for mounting a terminal of a collection harness is provided on the bending protrusion.

[0014] The beneficial effects of the utility model are as follows: the utility model belongs to an improved invention. Specifically, when assembling a battery module, the cover plate can be first buckled on the battery module formed by several battery cells that have been assembled and connected, and then the cover plate and the conductive bar are tied and connected by using a binding piece through the first perforation, the second perforation and the third perforation of the conductive bar. After the binding piece is tied, the conductive bar is equivalent to the connection basis between the cover plate and the battery module. In the up and down and left and right directions, the binding piece can play a role in limiting the position of the cover plate. In this way, no matter which direction the load and bending stress are applied, the binding piece can stably limit the position of the cover plate. Moreover, the binding piece does not directly contact the battery cell, and the aging speed of the binding piece itself is much lower than that of general adhesive. Therefore, the scheme of the utility model that connects the cover plate and the conductive bar through the binding piece has better reliability and can meet the long-term reliable use of the battery module.

[0015] To achieve the above purpose, the technical solution of the battery module provided by the utility model is:

[0016] A battery module comprises a cover plate, a battery cell and a conductive bar, wherein the conductive bar is connected to a pole of the battery cell via a connecting end, the cover plate comprises a cover plate body, the cover plate body is provided with two oppositely arranged or more than three folded edges which are bound and matched with the conductive bar, the battery module further comprises a binding piece, the folded edge is provided with a first through hole, the cover plate body is provided with a second through hole or the folded edge is provided with a first through hole and a second through hole, the conductive bar is provided with a bending protrusion, the bending protrusion is provided with a third through hole, and the binding piece passes through the first through hole, the second through hole and the third through hole to bind and connect the cover plate and the conductive bar.

[0017] As a further improvement, the folded edge and the contact surface of the battery cell are bonded by adhesive.

[0018] As a further improvement, the bending protrusion is arranged between two connection ends of the conductive bar connected to different battery cells.

[0019] As a further improvement, a terminal mounting portion for mounting a terminal of a collection harness is provided on the bending protrusion.

[0020] As a further improvement, the binding member is a cable tie.

[0021] The beneficial effects of the utility model are as follows: the utility model belongs to an improved invention. Specifically, during assembly, the cover plate can be first buckled onto a battery module formed by several battery cells that have been assembled and connected, and then the cover plate and the conductive bar are tied and connected by using a binding piece through the first perforation, the second perforation and the third perforation of the conductive bar. After the binding piece is tied, the conductive bar is equivalent to the connection basis between the cover plate and the battery module. In the up and down and left and right directions, the binding piece can play a role in limiting the position of the cover plate. In this way, no matter which direction the load and bending stress are applied, the binding piece can stably limit the position of the cover plate. Moreover, the binding piece does not directly contact the battery cell, and the aging speed of the binding piece itself is much lower than that of general adhesive. Therefore, the scheme of the utility model that connects the cover plate and the conductive bar through a binding piece has better reliability and can meet the long-term reliable use of the battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a three-dimensional structural diagram of a battery module embodiment 1 of the present utility model;

[0023] Figure 2 for Figure 1 The schematic diagram of the battery module when the cover is installed is shown;

[0024] Figure 3 for Figure 2 A partial enlarged view of the location of the middle conductive bar;

[0025] Figure 4 for Figure 1 A schematic diagram of the structure of the middle cover plate at a certain viewing angle;

[0026] Figure 5 for Figure 1 A schematic diagram of the structure of the middle cover plate from another perspective;

[0027] Figure 6 for Figure 1 Expanded view of the middle cover.

[0028] Description of reference numerals:

[0029] 1. Cover plate; 2. Battery cell; 3. Binding tape; 4. End plate; 5. Binding piece; 6. Conductive bar; 7. Collection harness; 101. Folded edge; 102. First perforation; 103. Second perforation; 104. Adhesive part; 601. Bending protrusion; 602. Connection end; 701. Terminal. DETAILED DESCRIPTION

[0030] In order to solve the problem of insufficient reliability of the prior art solution of bonding the cover plate and the battery cell only by adhesive, the basic technical concept of the utility model is to use the conductive bar as the connection basis, set mutually matching perforations on the cover plate and the conductive bar respectively, and use a binding piece to pass through the perforations to bind the folded edge of the cover plate and the conductive bar. Regardless of the direction of the load and bending stress, the binding piece can stably limit the position of the cover plate.

[0031] The present invention is further described in detail below in conjunction with the embodiments.

[0032] Specific embodiment 1 of the battery module provided by the utility model:

[0033] The battery module provided in this embodiment is as follows Figure 1 and Figure 2 As shown, it includes several battery cells 2, a conductive bar 6, a cover plate 1, an end plate 4, a collection harness 7, a binding piece 5, etc. The battery cell 2 as a whole and the end plates 4 at both ends are fixed as a whole by a binding band 3. The conductive bar 6 electrically connects the poles of different battery cells 2. The cover plate 1 is arranged above the battery cell 2. The terminal 701 at one end of the collection harness 7 is directly connected to the conductive bar 6, which can collect information such as the temperature and voltage of the battery cell 2.

[0034] The structure of the cover plate 1 is as follows Figure 1 and Figure 4-Figure 6 As shown, the cover plate 1 includes a cover plate 1 body, and the cover plate 1 body is provided with two folding edges 101 for binding with the conductive bar 6. The cover plate 1 body mentioned here corresponds to Figure 1 In the flat plane in the z direction (perpendicular to the z direction), the two folded edges 101 correspond to Figure 1 Two folded edges 101 are arranged opposite to each other in the y direction (perpendicular to the y direction), and the inner side of the folded edge 101 can directly contact the side of the battery cell 2. The folded edge 101 is provided with a first through hole 102 for the binding member 5 to pass through, and the cover plate 1 body is provided with a second through hole 103 for the binding member 5 to pass through. The first through hole 102 and the second through hole 103 can allow the binding member 5 to pass in and out.

[0035] The structure of the conductive bar 6 is as follows: Figure 2 and Figure 3 As shown, it has a connection end 602 for electrically connecting to the pole of the battery cell 2. Specifically, it can be connected to the pole of the battery cell 2 by laser welding or bolt connection to form a stable force-bearing structure. The conductive bar 6 is provided with a bending protrusion 601, and the bending protrusion 601 is provided with a third through-hole for the binding member 5 to pass through. The position of the third through-hole corresponds to the first through-hole 102 and the second through-hole 103 to meet the requirement of the same binding member 5 passing through.

[0036] The binding member 5 is made of an insulating material, preferably a cable tie, which has a self-locking structure, can achieve self-locking, and has better stability. Of course, in other embodiments, the binding member 5 can also use a binding rope without a self-locking structure, and the binding rope is manually locked using a lock buckle during installation.

[0037] When assembling the battery module, Figure 2 and Figure 3 As shown, the battery cell 2, the conductive bar 6, the end plate 4, and the collection harness 7 can be connected correspondingly first, and the binding member 5 can also pass through the third through hole of the conductive bar 6 first. Since the first through hole 102 and the second through hole 103 are respectively arranged on the folded edge 101 and the cover plate 1 body, in order to facilitate on-site operation, the axis of the third through hole extends in the vertical direction, that is, Figure 1 After the cover plate 1 is installed, the tying member 5 can pass through the first through hole 102 and the second through hole 103, and finally the tying member 5 can be fastened.

[0038] Compared with the prior art, the cover plate 1 in this embodiment is fixedly connected to the conductive bar 6. During use, no matter which direction the impact load is, it can maintain a stable state under the action of the binding member 5. Moreover, the binding member 5 can also provide an inward holding force for the folded edge 101 to avoid the folded edge 101 from tilting due to the release of bending stress. Finally, the binding member 5 will not directly contact the battery cell 2, and the aging speed is also slow. In summary, the scheme of connecting the cover plate 1 and the conductive bar 6 through the binding member 5 in this embodiment has better reliability.

[0039] On the basis of binding the cover plate 1 to the conductive bar 6 by the binding member 5, the folded edge 101 in this embodiment is also bonded to the side of the battery cell 2 by adhesive, that is, the contact surface of the folded edge 101 for contacting the battery cell 2 is provided with an adhesive portion 104 for bonding adhesive, such as Figure 6 As shown. This is equivalent to double insurance, and the reliability is better. At the same time, the adhesive can also play a better sealing role to ensure the sealing of the enclosed space formed between the cover plate 1 and the upper end of the battery cell 2, and the results measured by the collection harness 7 are more accurate.

[0040] In other embodiments, the adhesive may not be provided, and the width between the folded edges 101 on both sides may be reduced. Under the action of the binding member 5, the folded edges 101 may be stably pressed against the sides of the battery core 2, and a better sealing effect may also be achieved.

[0041] like Figure 3As shown, the bending protrusion 601 in this embodiment is arranged between the connection ends 602 of the conductive bar 6 for connecting to different battery cells 2, so that both sides of the bending protrusion 601 can be reliably fixed, and the stability is better. In addition, the terminal 701 of the collection harness 7 is installed on the bending protrusion 601, that is, the bending protrusion 601 is provided with a terminal 701 installation portion for installing the terminal 701 of the collection harness 7, so that the bending protrusion 601 is convenient for installing the terminal 701 by riveting and bolting. Of course, in other embodiments, if the terminal 701 is connected to the conductive bar 6 by welding, it can be connected to other positions of the conductive bar 6.

[0042] In other embodiments, the bending protrusion 601 may not be arranged between two connection ends 602 connected to different battery cells 2, but may be arranged on one side of one of the connection ends 602. In this case, it is more suitable for a longer conductive bar 6 (with more points connected to the battery cells) and has better stability. Figure 1 The folded edge in the x direction (perpendicular to the x direction) can also be provided with a first through-hole and a second through-hole, and the folded edge in the x direction can also be connected to the conductive bar by using a cable tie to pass through the first through-hole and the second through-hole on the folded edge in the x direction. In other words, the cover plate has three folded edges for binding and connecting with the conductive bar. In other embodiments, depending on the position of the positive and negative poles of the actual output terminal, if space permits, the four folded edges of the cover plate can be provided with through-holes for the binding members to pass through, so as to achieve binding coordination between the cover plate and the conductive bar.

[0043] Specific embodiment 2 of the battery module in the utility model:

[0044] The folded edge 101 in this embodiment is provided with a first through hole 102 and a second through hole 103 for the binding member 5 to pass through. Correspondingly, in order to facilitate the passing of the binding member 5, the axis of the third through hole provided on the conductive bar 6 extends transversely, along Figure 1 In the x direction, Figure 3 For example, at this time, the third through hole can penetrate and connect the two side walls of the bending protrusion 601.

[0045] Specific embodiments of the battery module cover in the utility model:

[0046] The structure of the battery module cover plate is consistent with the cover plate structure described in the above-mentioned embodiment 1 or embodiment 2 of the battery module, and will not be described in detail here.

[0047] Specific embodiments of the conductive bar in the utility model:

[0048] The structure of the conductive bar is consistent with the conductive bar structure described in Embodiment 1 or Embodiment 2 of the above-mentioned battery module, and will not be described in detail here.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments without creative work, or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A battery module cover, comprising a cover body, characterized in that: The cover body is provided with two relatively arranged or more folded edges for cooperating with the conductive bar binding, the folded edge is provided with a first through hole for the insulating binding piece to pass through, the cover body is provided with a second through hole for the insulating binding piece to pass through, or the folded edge is provided with a first through hole and a second through hole for the binding piece to pass through, the first through hole and the second through hole are used to correspond and cooperate with the third through hole set on the conductive bar of the battery module to meet the passage of the same insulating binding piece.

2. The battery module cover according to claim 1, characterized in that: The contact surface of the folded edge for contacting the battery core is also provided with an adhesive portion for bonding adhesive.

3. A conductive bar, comprising a connection terminal for connecting to a pole of a battery cell, characterized in that: The conductive bar is provided with a bending protrusion, and the bending protrusion is provided with a third through-hole for the insulating binding piece to pass through. The third through-hole is used to correspond to the first through-hole and the second through-hole provided on the cover plate of the battery module to meet the requirements of the same insulating binding piece to pass through.

4. The conductive bar according to claim 3, characterized in that: The bending protrusion is arranged between two connection ends of the conductive bar for connecting with different battery cells.

5. The conductive bar according to claim 3 or 4, characterized in that: The bent protrusion is provided with a terminal mounting portion for mounting a terminal of a collection wiring harness.

6. A battery module, comprising a cover plate, a battery cell and a conductive bar, wherein the conductive bar is connected to a pole of the battery cell through a connecting end, and the cover plate comprises a cover plate body, characterized in that: The cover plate body is provided with two relatively arranged or more than three folded edges which cooperate with the conductive bar for binding. The battery module also includes a binding piece. The folded edge is provided with a first through hole, the cover plate body is provided with a second through hole or the folded edge is provided with a first through hole and a second through hole. The conductive bar is provided with a bending protrusion, and the bending protrusion is provided with a third through hole. The binding piece passes through the first through hole, the second through hole and the third through hole to bind and connect the cover plate and the conductive bar.

7. The battery module according to claim 6, characterized in that: The folded edge and the contact surface of the battery core are bonded by adhesive.

8. The battery module according to claim 6, characterized in that: The bending protrusion is arranged between two connection ends of the conductive bar connected to different battery cells.

9. The battery module according to claim 6, 7 or 8, characterized in that: The bent protrusion is provided with a terminal mounting portion for mounting a terminal of a collection wiring harness.

10. The battery module according to claim 6, 7 or 8, characterized in that: The binding piece is a cable tie.

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