Battery cell fusing control structure and battery

Abstract

The utility model relates to the technical field of batteries, and discloses a battery cell fusing control structure and a battery, and the battery cell fusing control structure comprises a first plate body; the pole column and the first plate body are arranged at an interval along the second direction; the fusing piece is suitable for electrically connecting the pole with the battery cell main body; a first groove is formed in the pole; the conductive part is arranged in the first groove, one end of the conductive part in the second direction is suitable for being electrically connected with the pole, and the other end of the conductive part tends to be close to and abut against the first plate body; the insulating part has a first state for locking the conductive part in the first groove and a second state for unlocking the conductive part; when the insulating part is switched from the first state to the second state, the other end of the conductive part abuts against the first plate body, and the fusing part is fused. According to the battery cell fusing control structure provided by the utility model, the isolation and elimination of abnormal battery cells and the continuous use of normal battery cells are realized, so that a battery pack can be continuously and normally used.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, in particular to a battery core fusing control structure and a battery. Background Art

[0002] With the popularity of electric vehicles, various safety issues of electric vehicles are increasing. After a period of use, individual battery cells are prone to failure. At present, with the increasing application of CTP (Cell To Pack) battery packs, if individual battery cells fail, the entire battery pack will not be able to be used normally. Almost all vehicle manufacturers can only replace the entire battery pack, resulting in a huge waste of costs. Utility Model Content

[0003] In view of this, the utility model provides a cell fusing control structure and a battery to solve the problem of the existing battery pack that when an individual cell fails, the entire battery pack cannot be used normally.

[0004] In a first aspect, the utility model provides a cell fusing control structure, comprising:

[0005] A first plate body;

[0006] A pole, spaced apart from the first plate body along the second direction;

[0007] A fuse, arranged at one end of the pole along the first direction, the fuse being suitable for electrically connecting the pole to the battery body;

[0008] A first groove is formed on the pole, and the first groove faces the first plate along the second direction;

[0009] A conductive member is disposed in the first groove, wherein one end of the conductive member in the second direction is suitable for being electrically connected to the pole, and the other end of the conductive member has a tendency to approach and abut against the first plate;

[0010] The insulating member has a first state in which the conductive member is locked in the first groove, and a second state in which the conductive member is unlocked; when the insulating member switches from the first state to the second state, the other end of the conductive member abuts against the first plate body, and the fuse is blown.

[0011] Beneficial effect: The battery cell fusing control structure provided by the utility model, when the battery cell is abnormal, the insulating part switches from the first state to the second state, the conductive part electrically connects the pole and the first plate, and the large current after conduction instantly melts the fuse, thereby disconnecting the battery cell body from the pole, achieving the isolation and removal of abnormal battery cells and the continued use of normal battery cells, thereby allowing the battery pack to continue to be used normally.

[0012] In an optional embodiment, the conductive member is movably disposed in the first groove;

[0013] The cell fuse control structure also includes a spring, which is pre-compressed in the first groove and abuts against one end of the conductive member in the second direction. The spring is suitable for maintaining the tendency of the conductive member to approach and abut against the first plate.

[0014] Beneficial effect: By setting a spring and pre-compressing the spring in the first groove, the spring provides potential energy for the conductive part to approach and abut against the first plate body, ensuring that after the insulating part unlocks the conductive part, the conductive part and the first plate body always remain in abutment state, thereby ensuring the stability of electrical conduction between the pole and the first plate body.

[0015] In an optional embodiment, a second groove is formed on one side of the first plate body close to the pole along the first direction, and the second groove is arranged opposite to the first groove along the second direction;

[0016] When the insulating member switches from the first state to the second state, the conductive member moves along the second direction toward the first plate body under the spring action of the spring and is inserted into the second groove.

[0017] Beneficial effect: By opening a second groove corresponding to the first groove on the first plate, when the insulating member switches from the first state to the second state, the conductive member is inserted into the second groove to ensure the stability of the electrical connection between the conductive member and the first plate, avoid relative slippage between the conductive member and the first plate, and further avoid frictional contact between the conductive member and the first plate that causes an increase in contact resistance, thereby ensuring the normal working performance of the remaining normal battery cells and the entire battery pack.

[0018] In an optional embodiment, the conductive member is made of an elastic material, one end of the conductive member is fixedly disposed in the first groove, and the other end of the conductive member is pre-compressed in the first groove by the insulating member.

[0019] Beneficial effect: The conductive part is made of elastic material and is locked in the first groove by the insulating part, so that the conductive part has the potential energy to approach and abut the first plate body. When the insulating part unlocks the conductive part, the conductive part and the first plate body can always maintain an abutment state, thereby ensuring the stability of electrical conduction between the pole and the first plate body.

[0020] In an optional implementation, the pole and the battery cell body are spaced apart along the first direction.

[0021] Beneficial effect: After the fuse is blown, the battery body is disconnected from the pole, ensuring effective isolation and removal of abnormal batteries.

[0022] In an optional embodiment, the insulating member is circumferentially arranged on the outer peripheral wall of the pole; the insulating member is made of an elastic material, and the inner peripheral wall of the insulating member elastically abuts against the outer peripheral wall of the pole.

[0023] Beneficial effect: The insulating member is sleeved on the outer peripheral wall of the pole, and the insulating member is made of elastic material so that the insulating member and the pole are elastically abutted and generate static friction, thereby avoiding relative slippage between the insulating member and the pole during normal operation.

[0024] In an optional embodiment, the battery cell fuse control structure also includes a traction wire, one end of which is fixedly connected to the insulating part, and the traction wire is suitable for pulling the insulating part along the pole away from the fuse under the action of external force, so that the insulating part releases the lock on the conductive part.

[0025] Beneficial effect: By setting a traction line and a fixed connection between the insulating part, when the battery cell is abnormal, the maintenance personnel can pull the insulating part along the pole through the traction line, so that the insulating part switches from the first state to the second state, so that the conductive part electrically conducts the pole and the first plate. The large current after conduction instantly melts the fuse, thereby disconnecting the battery cell body from the pole, thereby achieving the isolation and removal of the abnormal battery cell and the continued use of the normal battery cell.

[0026] In an optional embodiment, the cell fuse control structure further includes a second plate body, which is arranged at one end of the pole away from the fuse element along the first direction; and a through hole is formed on the second plate body;

[0027] The cell fusing control structure also includes a sealing sheet, which is covered at the through hole;

[0028] The other end of the traction line is fixedly arranged on one side of the sealing sheet close to the pole along the first direction.

[0029] Beneficial effects: When the battery cell is abnormal, the sealing piece can be automatically opened under the impact of the internal pressure of the battery cell, or the maintenance personnel can use tools to open the sealing piece outside the battery cell, so that the sealing piece is passively opened. After the sealing piece is opened, the maintenance personnel can pull the insulating part along the pole through the traction line, so that the insulating part switches from the first state to the second state.

[0030] In an optional embodiment, a guide portion is provided on one side of the first plate body in the first direction, the guide portion is formed by a side edge of the first plate body protruding along the first direction close to the pole along the second direction, and the guide portion is suitable for supporting and guiding the traction line.

[0031] Beneficial effect: By providing a guide portion on the first plate, when the battery cell is abnormal, the maintenance personnel can pull the insulating part along the pole through the traction line. At this time, the traction line can use the guide portion as a fulcrum so that the direction of the force of the traction line on the insulating part is maintained and / or tends to be consistent with the movement direction of the insulating part, thereby reducing the difficulty of pulling the insulating part by the traction line.

[0032] In a second aspect, the utility model provides a battery, comprising: a plurality of battery cells, each of which is provided with the above-mentioned battery cell fusing control structure.

[0033] Beneficial effects: The battery of the second aspect includes the battery cell fusing control structure of the first aspect, and therefore, the battery of the second aspect includes all the beneficial effects of the battery cell fusing control structure of the first aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0035] Figure 1 It is a schematic diagram of the working principle of a battery core fusing control structure in a first state according to an embodiment of the utility model;

[0036] Figure 2 It is a schematic diagram of the working principle of a battery core fusing control structure in a second state according to an embodiment of the utility model;

[0037] Figure 3 A schematic diagram of the working principle of another battery core fusing control structure in a first state according to an embodiment of the utility model;

[0038] Figure 4 The figure is a schematic diagram of the working principle of another battery cell fuse control structure in the second state according to an embodiment of the utility model.

[0039] Description of reference numerals:

[0040] 10. first plate body; 11. second groove; 12. guide portion;

[0041] 20. pole; 21. first groove;

[0042] 30. Fuse;

[0043] 40. Conductive parts;

[0044] 50. Insulation parts;

[0045] 60. Spring;

[0046] 70. Traction line;

[0047] 80. second plate; 81. through hole; 82. sealing sheet;

[0048] 90. Battery cell body. DETAILED DESCRIPTION

[0049] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the utility model.

[0050] Combine the following Figures 1 to 4 , describing an embodiment of the utility model.

[0051] According to an embodiment of the present utility model, on the one hand, a cell fusing control structure is provided, comprising:

[0052] A first plate 10;

[0053] The pole 20 is spaced apart from the first plate 10 along the second direction;

[0054] The fuse 30 is disposed at one end of the pole 20 along the first direction. The fuse 30 is suitable for electrically connecting the pole 20 with the battery body 90. The fuse 30 can serve as a fuse between the pole 20 and the battery body 90, thereby preventing long-term large current from causing harm to the battery;

[0055] The pole 20 is provided with a first groove 21, and the first groove 21 is directed toward the first plate body 10 along the second direction;

[0056] The conductive member 40 is made of a conductive material and is disposed in the first groove 21. One end of the conductive member 40 in the second direction is suitable for being electrically connected to the pole 20, and the other end of the conductive member 40 has a tendency to approach and abut against the first plate 10.

[0057] The insulating member 50 is made of an insulating material and has a first state in which the conductive member 40 is locked in the first groove 21, and a second state in which the conductive member 40 is unlocked. When the insulating member 50 switches from the first state to the second state, the other end of the conductive member 40 abuts against the first plate body 10, and the fuse 30 melts.

[0058] It should be noted that the cell fuse control structure of the utility model can be applied to both single-pole cell and bipolar cell. The cell fuse control structure of the utility model can be set in each cell in the battery pack; in the specific implementation process, the power battery management system (Battery Management System, BMS) can be used to monitor whether each cell is abnormal. For better explanation and understanding, the following is an example of a bipolar cell. For a bipolar cell, there may be two poles 20, which are respectively arranged at the two ends of the second direction of the first plate 10, one of which is used as a positive pole and the other as a negative pole. When the cell is in normal working state, the insulating member 50 always remains in the first state. When a cell is abnormal, the insulating member 50 is switched from the first state to the second state under the action of external force, the insulating member 50 unlocks the conductive member 40, and the other end of the conductive member 40 pops out from the first groove 21 and abuts against the first plate 10. At this time, the conductive member 40 electrically conducts the two poles 20 with the first plate 10, thereby conducting the positive and negative poles of the cell. The large current after conduction instantly melts the fuse 30, and then disconnects the cell body 90 from the pole 20, thereby achieving isolation and removal of the abnormal cell. At the same time, the pole 20 maintains electrical connection with the first plate 10 and continues to conduct electricity as a conductor as a whole, ensuring the continued use of the remaining normal cells. The abnormal cell disconnection principle of the single-pole cell is the same as that of the bipolar cell mentioned above and will not be repeated here.

[0059] Furthermore, the first plate body 10 is made of aluminum.

[0060] The cell fuse control structure provided by the utility model mainly includes a first plate body 10, a pole 20, a fuse 30, a conductive member 40 and an insulating member 50, wherein the fuse 30 is suitable for electrically connecting the pole 20 with the cell body 90, the conductive member 40 is built in the first groove 21 of the pole 20, and the conductive member 40 has a tendency to approach and abut against the first plate body 10, and the insulating member 50 has a first state of locking the conductive member 40 in the first groove 21, and a second state of unlocking the conductive member 40; when the cell is abnormal, the insulating member 50 switches from the first state to the second state, and the conductive member 40 electrically conducts the pole 20 with the first plate body 10, and the large current after conduction instantly melts the fuse 30, thereby disconnecting the cell body 90 from the pole 20, thereby achieving the isolation and removal of the abnormal cell and the continued use of the normal cell, so that the battery pack can continue to be used normally.

[0061] In some embodiments, please combine Figure 1 and Figure 2 As shown, the conductive member 40 is movably disposed in the first groove 21, and the conductive member 40 may be a block structure;

[0062] The cell fuse control structure further includes a spring 60 , which is pre-compressed in the first groove 21 and abuts against one end of the conductive member 40 in the second direction. The spring 60 is suitable for maintaining the conductive member 40 to approach and abut against the first plate 10 .

[0063] Furthermore, the conductive member 40 may be a copper block.

[0064] In this embodiment, a spring 60 is provided and pre-compressed in the first groove 21, so that the spring 60 provides potential energy for the conductive member 40 to approach and abut against the first plate body 10, ensuring that after the insulating member 50 unlocks the conductive member 40, the conductive member 40 and the first plate body 10 always remain in abutment with each other, thereby ensuring the stability of electrical conduction between the pole 20 and the first plate body 10.

[0065] In some embodiments, please combine Figure 1 and Figure 2 As shown, a second groove 11 is formed on one side of the first plate body 10 close to the pole 20 along the first direction, and the second groove 11 is arranged opposite to the first groove 21 along the second direction;

[0066] When the insulating member 50 switches from the first state to the second state, the conductive member 40 moves along the second direction toward the first plate 10 under the spring action of the spring 60 and is inserted into the second groove 11 .

[0067] In this embodiment, by opening a second groove 11 corresponding to the first groove 21 on the first plate body 10, when the insulating member 50 is switched from the first state to the second state, the conductive member 40 is inserted into the second groove 11 to ensure the stability of the electrical connection between the conductive member 40 and the first plate body 10, avoid relative slippage between the conductive member 40 and the first plate body 10, and further avoid friction contact between the conductive member 40 and the first plate body 10 to cause an increase in contact resistance, thereby ensuring the normal working performance of the remaining normal battery cells and the entire battery pack.

[0068] In some embodiments, please combine Figure 3 and Figure 4 As shown, the conductive member 40 is made of elastic material, one end of the conductive member 40 is fixedly disposed in the first groove 21 , and the other end of the conductive member 40 is pre-compressed in the first groove 21 by the insulating member 50 .

[0069] Furthermore, the conductive member 40 may be made of an elastic copper sheet.

[0070] In this embodiment, the conductive member 40 is made of an elastic material and is locked in the first groove 21 by the insulating member 50, so that the conductive member 40 has the potential energy to approach and abut the first plate body 10. When the insulating member 50 unlocks the conductive member 40, the conductive member 40 and the first plate body 10 can always maintain an abutting state, thereby ensuring the stability of electrical conduction between the pole 20 and the first plate body 10.

[0071] In some embodiments, see Figure 1 and Figure 3 As shown, the pole 20 and the battery body 90 are spaced apart along a first direction, and the pole 20 and the battery body 90 are electrically connected via a fuse 30 .

[0072] In this embodiment, the pole 20 and the cell body 90 are spaced apart along the first direction, so that after the fuse 30 is blown, the cell body 90 is disconnected from the pole 20, thereby ensuring effective isolation and removal of abnormal cells.

[0073] In some embodiments, see Figure 1 and Figure 3 As shown, the insulating member 50 is an annular structure, and the insulating member 50 is circumferentially arranged on the outer peripheral wall of the pole 20 ; the insulating member 50 is made of elastic material, and the inner peripheral wall of the insulating member 50 elastically abuts against the outer peripheral wall of the pole 20 .

[0074] Furthermore, the insulating member 50 may be made of rubber.

[0075] In this embodiment, the insulating member 50 is sleeved on the outer peripheral wall of the pole 20. The insulating member 50 is made of elastic material so that the insulating member 50 and the pole 20 are elastically abutted and generate static friction, thereby avoiding relative slippage between the insulating member 50 and the pole 20 during normal operation.

[0076] In some embodiments, please combine Figure 1-Figure 4 As shown, the cell fuse control structure also includes a traction wire 70, one end of which is fixedly connected to the insulating member 50. The traction wire 70 is suitable for pulling the insulating member 50 along the pole 20 away from the fuse 30 under the action of an external force, so that the insulating member 50 releases the lock on the conductive member 40.

[0077] In this embodiment, a traction line 70 is provided to be fixedly connected with the insulating member 50. When the battery cell is abnormal, the maintenance personnel can pull the insulating member 50 along the pole 20 through the traction line 70, so that the insulating member 50 is switched from the first state to the second state, so that the conductive member 40 electrically connects the pole 20 with the first plate 10. The large current after conduction instantly melts the fuse 30, thereby disconnecting the battery cell body 90 from the pole 20, thereby achieving the isolation and removal of the abnormal battery cell and the continued use of the normal battery cell.

[0078] In some embodiments, please combine Figure 1-Figure 4 As shown, the cell fuse control structure further includes a second plate 80, which is disposed at one end of the pole 20 away from the fuse 30 along the first direction; a through hole 81 is formed on the second plate 80;

[0079] The cell fusing control structure further includes a sealing sheet 82, which is disposed on the through hole 81;

[0080] The other end of the pulling wire 70 is fixedly disposed on one side of the sealing sheet 82 close to the pole 20 along the first direction.

[0081] It should be noted that, when the battery cell is in normal working condition, the sealing sheet 82 is sealed and connected to the second plate 80, and the other end of the traction line 70 is fixedly arranged on the side of the sealing sheet 82 close to the pole 20 along the first direction; when the battery cell is abnormal, the sealing sheet 82 can be automatically opened under the impact of the internal pressure of the battery cell, or the maintenance personnel can use tools to open the sealing sheet 82 outside the battery cell, so that the sealing sheet 82 is passively opened. After the sealing sheet 82 is opened, the maintenance personnel can pull the insulating member 50 along the pole 20 through the traction line 70, so that the insulating member 50 switches from the first state to the second state.

[0082] In some embodiments, please combine Figure 1-Figure 4 As shown, a guide portion 12 is provided on one side of the first plate body 10 in the first direction. The guide portion 12 is formed by protruding along the first direction from one side edge of the first plate body 10 close to the pole 20 in the second direction. The guide portion 12 is suitable for supporting and guiding the traction line 70.

[0083] In this embodiment, by providing a guide portion 12 on the first plate body 10, when the battery cell is abnormal, the maintenance personnel can pull the insulating member 50 along the pole 20 through the traction line 70. At this time, the traction line 70 can use the guide portion 12 as a fulcrum, so that the direction of the force applied by the traction line 70 on the insulating member 50 is maintained and / or tends to be consistent with the movement direction of the insulating member 50, thereby reducing the difficulty of pulling the insulating member 50 by the traction line 70.

[0084] According to an embodiment of the present invention, on the other hand, a battery is provided, comprising: a plurality of battery cells, each of which is provided with the above-mentioned battery cell fusing control structure.

[0085] The battery in this solution includes the above-mentioned battery cell fusing control structure, and therefore, the battery in this solution includes all the beneficial effects of the above-mentioned battery cell fusing control structure.

[0086] Although the embodiments of the present invention are described in conjunction with the accompanying drawings, those skilled in the art may make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations are all within the scope defined by the appended claims.

Claims

1. A cell fusing control structure, characterized in that: include: A first plate body; A pole, spaced apart from the first plate along the second direction; A fuse, disposed at one end of the pole along the first direction, the fuse being suitable for electrically connecting the pole to the battery body; A first groove is formed on the pole, and the first groove is directed toward the first plate along a second direction; A conductive member, disposed in the first groove, wherein one end of the conductive member in the second direction is suitable for being electrically connected to the pole, and the other end of the conductive member has a tendency to approach and abut against the first plate; The insulating member has a first state in which the conductive member is locked in the first groove, and a second state in which the conductive member is unlocked; when the insulating member switches from the first state to the second state, the other end of the conductive member abuts against the first plate body, and the fuse melts.

2. The cell fusing control structure according to claim 1, characterized in that: The conductive member is movably disposed in the first groove; The cell fusing control structure further includes a spring, which is pre-compressed in the first groove and abuts against one end of the conductive member in the second direction, and is suitable for maintaining the conductive member's tendency to approach and abut against the first plate.

3. The cell fusing control structure according to claim 2, characterized in that: A second groove is formed on one side of the first plate body close to the pole along the first direction, and the second groove is arranged opposite to the first groove along the second direction; When the insulating member switches from the first state to the second state, the conductive member moves along the second direction toward the first plate body under the spring action of the spring and is inserted into the second groove.

4. The cell fusing control structure according to claim 1, characterized in that: The conductive member is made of elastic material, one end of the conductive member is fixedly disposed in the first groove, and the other end of the conductive member is pre-compressed in the first groove by the insulating member.

5. The cell fusing control structure according to claim 1, characterized in that: The pole and the battery cell body are spaced apart from each other along a first direction.

6. The cell fusing control structure according to any one of claims 1 to 5, characterized in that: The insulating member is circumferentially arranged on the outer peripheral wall of the pole; the insulating member is made of elastic material, and the inner peripheral wall of the insulating member elastically abuts against the outer peripheral wall of the pole.

7. The cell fusing control structure according to claim 6, characterized in that: The battery cell fuse control structure also includes a traction wire, one end of which is fixedly connected to the insulating member, and the traction wire is suitable for pulling the insulating member along the pole away from the fuse member under the action of an external force, so that the insulating member releases the lock on the conductive member.

8. The cell fusing control structure according to claim 7, characterized in that: The cell fusing control structure further comprises a second plate, which is arranged at one end of the pole away from the fuse along the first direction; a through hole is formed on the second plate; The cell fusing control structure further comprises a sealing sheet, and the sealing sheet is covered at the through hole; The other end of the traction line is fixedly arranged on a side of the sealing sheet close to the pole along the first direction.

9. The cell fusing control structure according to claim 7, characterized in that: A guide portion is provided on one side of the first plate body in the first direction. The guide portion is formed by a side edge of the first plate body protruding along the first direction close to the pole along the second direction. The guide portion is suitable for supporting and guiding the traction line.

10. A battery, characterized in that: include: A plurality of battery cells, each of which is provided with a battery cell fuse control structure as described in any one of claims 1 to 9.

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