Battery cell, battery and automobile

Abstract

The utility model discloses a battery cell, a battery and an automobile. The battery cell comprises a pole core, a first pole cover plate, an anti-explosion valve and a space ring, a first pole and a second pole are respectively arranged on two opposite side surfaces of the pole core; the first pole cover plate is arranged on one side of the first pole; the anti-explosion valve is arranged on the first pole cover plate and provided with an exhaust port used for pressure relief, and the exhaust port penetrates through the first pole cover plate; the space ring is arranged between the first pole cover plate and the first pole of the pole core to isolate the first pole of the pole core from the first pole cover plate, and the space ring is provided with a through hole opposite to the exhaust port of the anti-explosion valve. According to the battery cell structure, an anti-explosion valve, a space ring and a pole core are sequentially arranged, lower plastic on the inner side of the anti-explosion valve for hindering exhausting is omitted, the space ring is used for replacing the lower plastic, and a through hole opposite to an exhaust valve is formed in the space ring, so that an exhaust channel on the inner side of the anti-explosion valve is enlarged, exhausting is more effective and rapid when the battery cell is in thermal runaway, and the service life of the battery cell is prolonged. Meanwhile, the blockage probability of the anti-explosion valve is reduced, and the battery cell is prevented from firing and exploding.

Description

Technical Field

[0001] The utility model relates to the field of new energy batteries, in particular to battery cells, batteries and automobiles. Background Art

[0002] As new energy vehicles become increasingly popular, their safety is a key concern for consumers. This safety is primarily reflected in the battery. In existing battery technology, a cell typically consists of a positive electrode cover, a negative electrode cover, a core, and a casing. An explosion-proof valve is located on the positive electrode cover, and a lower plastic seal is located inside the positive electrode cover, isolating the core from the positive electrode cover.

[0003] However, since the lower plastic is arranged on the inner side of the positive electrode cover, there is a risk of clogging the explosion-proof valve. Once clogging occurs, it is very likely that the battery cell will not be able to exhaust quickly when thermal runaway occurs, causing the battery cell to catch fire and explode. Utility Model Content

[0004] The utility model provides a battery cell, a battery and a car, aiming to solve the problem in the prior art that the lower plastic easily blocks the explosion-proof valve.

[0005] In a first aspect, the utility model discloses a battery cell, comprising:

[0006] A pole core, wherein two opposite side surfaces of the pole core are respectively configured as a first pole and a second pole;

[0007] a first pole cover plate, disposed on one side of the first pole;

[0008] an explosion-proof valve, disposed on the first pole cover, the explosion-proof valve having an exhaust port for pressure relief, the exhaust port penetrating the first pole cover; and

[0009] A spacer is provided between the first pole cover and the first pole of the pole core to isolate the first pole of the pole core from the first pole cover, and the spacer has a through hole arranged opposite to the exhaust port of the explosion-proof valve.

[0010] In some embodiments, a first exhaust channel and a second exhaust channel are formed between the spacer and the first pole cover plate.

[0011] In some embodiments, the spacer includes a main body, a first side, and a second side; the main body is arranged opposite to the first pole cover, the first side is connected to a short side of the main body, the second side is connected to two long sides of the main body, and the first side and the second side are arranged on a side of the main body close to the first pole cover; the first exhaust channel is formed between the first side and the first pole cover, and the second exhaust channel is formed between the second side and the first pole cover.

[0012] In some embodiments, the spacer further includes a first exhaust groove and a second exhaust groove; the first exhaust groove is formed by the end surface of the first side away from the main body being recessed in a direction close to the main body, and the second exhaust groove is formed by the end surface of the second side away from the main body being recessed in a direction close to the main body; one end of the first side away from the main body abuts against the first pole cover plate, and one end of the second side away from the main body abuts against the first pole cover plate, so that the first exhaust channel is formed between the first exhaust groove and the first pole cover plate, and the second exhaust channel is formed between the second exhaust groove and the first pole cover plate.

[0013] In some embodiments, the main body includes a first body and a second body connected to the first body, the through hole is set on the first body, and the first side and the second side are connected to the first body so that the first exhaust groove and the second exhaust groove are set around the through hole.

[0014] In some embodiments, the battery cell also includes a lower plastic, which is arranged on the first pole cover and on the side of the first pole cover close to the spacer. The lower plastic is away from the exhaust port of the explosion-proof valve and is arranged opposite to the second body of the main body so that the second body abuts against the lower plastic.

[0015] In some embodiments, the battery core further includes a polyester film, and the polyester film is coated on the electrode core.

[0016] In some embodiments, the battery core further includes a shell, and the shell is sleeved on the outside of the polyester film.

[0017] In a second aspect, the present invention further discloses a battery, comprising at least one battery cell as described in any one of the first aspects, wherein the battery cells are arranged in a matrix.

[0018] In a third aspect, the present invention further discloses a car, comprising the battery and electric drive described in the second aspect, wherein the battery is electrically connected to the electric drive.

[0019] Beneficial effects of the present invention: The present invention discloses a battery cell, a battery and a car, wherein the battery cell includes a pole core, a first pole cover, an explosion-proof valve and a spacer; the two opposite side surfaces of the pole core are respectively arranged as a first pole and a second pole; the first pole cover is arranged on one side of the first pole; the explosion-proof valve is arranged on the first pole cover, and the explosion-proof valve has an exhaust port for pressure relief, and the exhaust port passes through the first pole cover; the spacer is arranged between the first pole cover and the first pole of the pole core to isolate the first pole of the pole core from the first pole cover, and the spacer has a through hole arranged opposite to the exhaust port of the explosion-proof valve.

[0020] The structure of the utility model is that the explosion-proof valve-spacer-electrode core are arranged in sequence, the lower plastic on the inside of the explosion-proof valve that hinders the exhaust is eliminated, and the lower plastic is replaced by a spacer, and a through hole opposite to the exhaust valve is provided on the spacer, which is conducive to increasing the exhaust channel inside the explosion-proof valve, and more effectively and quickly exhausts when the battery cell has thermal runaway, while reducing the probability of blockage of the explosion-proof valve and preventing the battery cell from catching fire and exploding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 An exploded diagram of the structure of the battery cell provided in an embodiment of the present utility model;

[0023] Figure 2 for Figure 1 An enlarged view of the position of the first pole cover of the battery cell shown;

[0024] Figure 3 A structural diagram of a spacer ring of a battery cell provided in an embodiment of the present utility model;

[0025] Figure 4 A front view of a spacer ring of a battery cell provided in an embodiment of the present utility model;

[0026] Figure 5 A cross-sectional view of a battery cell provided in an embodiment of the present utility model;

[0027] Figure 6 for Figure 5 An enlarged view of node A of the cell shown;

[0028] Figure 7 Another cross-sectional view of a battery cell provided by an embodiment of the present utility model;

[0029] Figure 8 for Figure 7 A magnified view of node B of the cell shown.

[0030] Figure numbers: 1, pole core; 11, core body; 12, pole ear; 2, first pole cover; 21, pole ear lead-out groove; 3, second pole cover; 4, explosion-proof valve; 5, spacer; 51, main body; 511, first main body; 512, second main body; 52, first side; 53, second side; 54, first exhaust groove; 55, second exhaust groove; 56, through hole; 57, pole ear lead-out window; 6, lower plastic; 7, polyester film; 8, shell; 9, external insulation component; 91, blue film; 92, first pole top patch; 93, second pole top patch. DETAILED DESCRIPTION

[0031] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. Now, in conjunction with the accompanying drawings, a detailed description of the preferred embodiments of the present utility model will be given.

[0032] like Figure 1 、 Figure 2 as well as Figure 3 As shown, the utility model discloses a battery cell that can be used in new energy vehicles. The battery cell may include a pole core 1, a first pole cover 2, an explosion-proof valve 4 and a spacer 5. The two opposite sides of the pole core 1 are respectively set as the first pole and the second pole. The first pole cover 2 is set on one side of the first pole. The explosion-proof valve 4 is set on the first pole cover 2. The explosion-proof valve 4 has an exhaust port for pressure relief, and the exhaust port passes through the first pole cover 2. The spacer 5 is set between the first pole cover 2 and the first pole of the pole core 1 to isolate the first pole of the pole core 1 from the first pole cover 2, and the spacer 5 has a through hole 56 arranged opposite to the exhaust port of the explosion-proof valve 4.

[0033] Specifically, the battery cell also includes a second pole cover 3. Opposite sides of the pole core 1 are provided with the first and second poles, respectively. The first pole can be positive or negative. When the first pole is positive, the second pole is negative; when the first pole is negative, the second pole is positive. The first pole cover 2 is provided on one side of the first pole of the pole core 1, and the second pole cover 3 is provided on the other side of the second pole of the pole core 1. In other words, the first and second pole covers 2 and 3 are provided at opposite ends of the pole core 1. The first and second pole covers 2 and 3 are used to lead out the first and second poles of the pole core 1, respectively. An explosion-proof valve 4 is provided on the first pole cover 2 and has a vent for pressure relief, which extends through the first pole cover 2. When the battery cell experiences thermal runaway, the internal pressure increases. At this point, the vent of the explosion-proof valve 4 opens, releasing the gas inside the cell to reduce the pressure and prevent fire or explosion. The spacer 5 is fixed to the pole core 1 by heat fusion on the side closest to the first pole. The spacer 5 has a through-hole 56 positioned opposite the exhaust port of the explosion-proof valve 4. This arrangement prevents the explosion-proof valve 4 from venting gas. When the pole core 1 inside the spacer 5 experiences thermal runaway and pressure increases, the gas can exit the battery cell through the through-hole 56 in the spacer 5 and the exhaust port of the explosion-proof valve 4. A first exhaust channel and a second exhaust channel are formed between the spacer 5 and the first pole cover 2. These channels further improve the exhaust efficiency of the battery cell and enhance its explosion-proof performance.

[0034] In some embodiments, as Figure 1 as well as Figure 2 As shown, the pole core 1 also includes a lower plastic 6, a polyester film 7, a housing 8, and an outer insulating assembly 9. The lower plastic 6 is disposed on the first pole cover 2. The polyester film 7 is coated on the pole core 1. The housing 8 is sleeved on the outside of the polyester film 7. The outer insulating assembly 9 is disposed on the housing 8 and the outsides of the first pole cover 2 and the second pole cover 3.

[0035] Specifically, the lower plastic 6 is disposed on the first pole cover 2 and is located on the side of the first pole cover 2 near the spacer 5. The side of the lower plastic 6 near the spacer 5 abuts against the spacer 5. On the one hand, the lower plastic 6 is used to isolate the first pole of the pole core 1 from the first pole cover 2, preventing them from direct contact, thereby avoiding short circuits. On the other hand, the lower plastic 6 can be used to protect the battery cell. When the battery cell is subjected to vibration or drops, the lower plastic 6 can play a certain buffering role, reducing the impact on the battery cell and protecting the battery cell from damage. The housing 8 is sleeved on the outside of the polyester film 7, that is, the housing 8 is sleeved on the combination of the pole core 1 and the polyester film 7. The housing 8 serves as a carrier for the internal components of the battery cell and protects them from the external environment. The first pole cover 2 and the second pole cover 3 are both sealed and welded to the housing 8. The external insulation component 9 is disposed on the outside of the housing 8 and the first pole cover 2 and the second pole cover 3, and serves as the external insulation of the battery cell. The polyester film 7 is coated on the pole core 1 and can be coated on the pole core 1 by hot melt. The polyester film 7 can effectively isolate the first and second poles of the pole core 1, preventing internal short circuits in the pole core 1. On the other hand, it can also serve as a protective layer for the pole core 1, effectively preventing leakage of substances inside the pole core 1 and isolating the pole core 1 from the external environment, reducing the impact of high temperature, low temperature, and humid external environments on the pole core 1. The external insulation component 9 is arranged on the outside of the housing 8 and the first and second pole covers 2 and 3, and serves as external insulation for the battery core.

[0036] In order to better understand the technical solution of the present application, the battery cell disclosed in the present application is described as a whole below. The battery cell may include a pole core 1, a first pole cover plate 2, a second pole cover plate 3, an explosion-proof valve 4, a spacer 5, a lower plastic 6, a polyester film 7, a shell 8 and an outer insulating component 9. The two opposite sides of the pole core 1 are respectively set as the first pole and the second pole. The first pole cover plate 2 is set on one side of the first pole of the pole core 1, and the second pole cover plate 3 is set on one side of the second pole of the pole core 1, that is, the first pole cover plate 2 and the second pole cover plate 3 are respectively set at both ends of the pole core 1. The first pole cover plate 2 and the second pole cover plate 3 are both sealed and welded to the shell 8, which are used to lead out the first pole and the second pole of the pole core 1 respectively. The explosion-proof valve 4 is set on the first pole cover plate 2, and the explosion-proof valve 4 has an exhaust port for pressure relief, and the exhaust port passes through the first pole cover plate 2.

[0037] When a battery cell experiences thermal runaway, the internal gas pressure increases. At this point, the exhaust port of explosion-proof valve 4 opens, discharging the gas inside the battery cell to reduce the internal pressure and prevent the battery cell from catching fire or exploding. A spacer 5 is disposed between the first pole cover 2 and the first pole of the pole core 1 to isolate the first pole of the pole core 1 from the first pole cover 2 and protect the pole core 1. The side of the spacer 5 closest to the first pole is fixed to the pole core 1 by heat-melting. A first exhaust channel and a second exhaust channel are formed between the spacer 5 and the first pole cover 2. These channels are used to further improve the exhaust efficiency of the battery cell and enhance its explosion-proof performance. The lower plastic 6 is provided on the first pole cover 2 and is provided on the side of the first pole cover 2 close to the spacer 5. The side of the lower plastic 6 close to the spacer 5 abuts against the spacer 5. On the one hand, the lower plastic 6 is used to isolate the first pole of the pole core 1 from the first pole cover 2 to prevent them from direct contact, thereby avoiding short circuit. On the other hand, the lower plastic 6 can be used to protect the battery cell. When the battery cell is vibrated or dropped, the lower plastic 6 can play a certain buffering role, reduce the impact on the battery cell, and protect the battery cell from damage. The polyester film 7 is coated on the pole core 1, and it can be coated on the pole core 1 by hot melting. On the one hand, the polyester film 7 can effectively isolate the first pole and the second pole of the pole core 1 and prevent internal short circuit of the pole core 1. On the other hand, it can also serve as a protective layer for the pole core 1, effectively preventing leakage of substances inside the pole core 1, and isolating the pole core 1 from the external environment, reducing the impact of high temperature, low temperature, and humid external environment on the pole core 1. The housing 8 is sleeved onto the outer side of the polyester film 7. Specifically, the housing 8 is sleeved onto the combination of the pole core 1 and the polyester film 7. The housing 8 serves as a carrier for the components within the cell, protecting them from the external environment. The external insulation component 9 is disposed on the outer side of the housing 8 and the first and second pole covers 2 and 3, providing external insulation for the cell.

[0038] It can be understood that a spacer ring and lower plastic can also be provided between the second pole cover plate 3 and the second pole of the pole core 1 .

[0039] To facilitate the assembly of the battery cell, if the cover plate on the negative electrode side is assembled with the shell 8 first, then the first pole is the positive pole, the second pole is the negative pole, the cover plate, spacer and lower plastic on the positive electrode side are the structural arrangement as described in the above embodiment, and the cover plate, spacer and lower plastic on the negative electrode side are an integrated design; if the cover plate on the positive electrode side is assembled with the shell 8 first, then the first pole is the negative pole, the second pole is the positive pole, the cover plate, spacer and lower plastic on the negative electrode side are the structural arrangement as described in the above embodiment, and the cover plate, spacer and lower plastic on the positive electrode side are an integrated design.

[0040] In some embodiments, as Figure 1 as well as Figure 2As shown, the pole core 1 may include a core body 11 and pole tabs 12 arranged at both ends of the core body 11. The core body 11 may be formed into a rectangular parallelepiped by stacking multiple layers of pole pieces. The above-mentioned first pole cover plate 2 and second pole cover plate 3 are respectively arranged on the outside of the two ends of the core body 11. The pole tab 12 is used to lead out the first pole and the second pole of the core body 11, forming a contact point when the battery cell is discharged, generating a loop, and thus realizing current transmission inside the battery cell. The opposite side of the pole tab 12 is arranged to improve the discharge platform of the battery cell, delay the softening of the active material of the first pole, and improve the cycle life. The pole tab 12 is mainly composed of an insulating sealant and a metal conductive matrix, wherein the first pole uses an aluminum pole tab, and the second pole uses a pure nickel strip pole tab or a nickel-plated copper strip pole tab.

[0041] In some embodiments, as Figure 1 as well as Figure 2 As shown, both the first pole cover plate 2 and the second pole cover plate 3 are provided with a pole tab lead-out groove 21. The pole tab lead-out groove 21 on the first pole cover plate 2 is formed by the end of the first pole cover plate 2 close to the core body 11 being recessed in the direction away from the core body 11. The pole tab lead-out groove 21 on the second pole cover plate 3 is formed by the end of the second pole cover plate 3 close to the core body 11 being recessed in the direction away from the core body 11. The pole tab lead-out groove 21 is used to accommodate the pole tabs 12 protruding from both ends of the core body 11.

[0042] See also Figure 3 as well as Figure 4 In some embodiments, the spacer 5 includes a main body 51, a first side 52, and a second side 53; the main body 51 is arranged opposite to the first pole cover 2, the first side 52 is connected to a short side of the main body 51, the second side 53 is connected to two long sides of the main body 51, and the first side 52 and the second side 53 are arranged on a side of the main body 51 close to the first pole cover 2; a first exhaust channel is formed between the first side 52 and the first pole cover 2, and a second exhaust channel is formed between the second side 53 and the first pole cover 2.

[0043] Specifically, the spacer 5 may include a main body 51, a first side 52, a second side 53, a first exhaust groove 54, a second exhaust groove 55, a through hole 56, and a tab lead-out window 57. The main body 51 may be rectangular and disposed opposite the first pole cover 2. The first side 52 is connected to one short side of the main body 51, and the second side 53 is connected to two long sides of the main body 51. The first and second sides 52, 53 are disposed on a side of the main body 51 proximal to the first pole cover 2. A first exhaust channel is formed between the first side 52 and the first pole cover 2, and a second exhaust channel is formed between the second side 53 and the first pole cover 2. The first and second sides 52, 53 may be disposed perpendicular to the main body 51, with the first and second sides 52, 53 being perpendicular to each other.

[0044] See also Figure 5 、 Figure 6 、 Figure 7 as well as Figure 8 In some embodiments, the spacer 5 further includes a first exhaust groove 54 and a second exhaust groove 55; the first exhaust groove 54 is formed by the end surface of the first side 52 away from the main body 51 being recessed in a direction close to the main body 51, and the second exhaust groove 55 is formed by the end surface of the second side 53 away from the main body 51 being recessed in a direction close to the main body 51; one end of the first side 52 away from the main body 51 abuts against the first pole cover 2, and one end of the second side 53 away from the main body 51 abuts against the first pole cover 2, so that a first exhaust channel is formed between the first exhaust groove 54 and the first pole cover 2, and a second exhaust channel is formed between the second exhaust groove 55 and the first pole cover 2.

[0045] Specifically, the first exhaust groove 54 is formed by the end surface of the first side 52 away from the main body 51, which is recessed toward the main body 51. The second exhaust groove 55 is formed by the end surface of the second side 53 away from the main body 51, which is recessed toward the main body 51. The depth H of the first exhaust groove 54 and the second exhaust groove 55 is less than 5 mm, and the length of the first exhaust groove 54 is less than the length of the second exhaust groove 55. The end of the first side 52 away from the main body 51 abuts the first pole cover 2, and the end of the second side 53 away from the main body 51 abuts the first pole cover 2, forming a first exhaust channel between the first exhaust groove 54 and the first pole cover 2, and a second exhaust channel between the second exhaust groove 55 and the first pole cover 2. A through hole 56 is provided in the main body 51, and the through hole 56 is arranged opposite the exhaust port of the explosion-proof valve 4. In this way, the arrangement of the spacer 5 will not hinder the exhaust of the explosion-proof valve 4. When the pole core 1 inside the spacer 5 experiences thermal runaway and the gas pressure increases, the gas can be discharged from the battery cell through the through hole 56 of the spacer 5 and the exhaust port of the explosion-proof valve 4 in sequence. In addition, when the gas enters the space between the spacer 5 and the first pole cover 2, the gas can also be discharged from the above-mentioned first exhaust channel and second exhaust channel, further improving the exhaust performance of the battery cell. The tab lead-out window 57 is set at a position opposite to the tab 12 of the first pole of the pole core 1 on the main body 51, so that the tab 12 of the first pole of the pole core 1 can enter the tab lead-out groove 21 on the first pole cover 2 through the tab lead-out window 57, thereby restraining the tab 12.

[0046] In some embodiments, see also Figure 5 、 Figure 6 、 Figure 7 as well as Figure 8 ，The main body 51 includes a first main body 511 and a second main body 512 connected to the first main body 511. The through hole 56 is set on the first main body 511. The first side 52 and the second side 53 are connected to the first main body 511 so that the first exhaust groove 54 and the second exhaust groove 55 are set around the through hole 56.

[0047] Specifically, the main body 51 may include a first main body 511 and a second main body 512 connected to the first main body 511. A through hole 56 is provided on the first main body 511, and the first side 52 and the second side 53 are connected to the first main body 511, so that the first exhaust groove 54 and the second exhaust groove 55 are arranged around the through hole 56 to further improve exhaust performance. A tab lead-out window 57 is provided on the second main body 512. This tab lead-out window 57 allows the tab 12 of the first pole of the pole core 1 to enter the tab lead-out groove 21 on the first pole cover 2 through the tab lead-out window 57, thereby constraining the tab 12.

[0048] See also Figure 1 as well as Figure 2 In some embodiments, the lower plastic 6 is positioned away from the exhaust port of the explosion-proof valve 4 and opposite the second body 512 of the main body 51, so that the second body 512 abuts the lower plastic 6. This allows the lower plastic 6 to avoid the exhaust port of the explosion-proof valve 4 while retaining its buffering function. The lower plastic 6 does not obstruct the exhaust flow of the explosion-proof valve 4, thus expanding the effective exhaust range of the explosion-proof valve 4 and improving the explosion-proof performance of the battery cell.

[0049] In some embodiments, as Figure 1 as well as Figure 2 As shown, the shell 8 can be an aluminum shell with a cavity inside. After the polyester film 7 covers the core 11, the combination of the polyester film 7 and the core 11 is placed in the cavity of the shell 8. The polyester film 7 can specifically be a Mylar film. On the one hand, it can effectively isolate the first and second poles of the pole core 1 to prevent internal short circuits in the pole core 1. On the other hand, the polyester film 7 can also serve as a protective layer for the pole core 1, effectively preventing leakage of substances inside the pole core 1 and isolating the pole core 1 from the external environment, reducing the impact of high temperature, low temperature, and humid external environments on the pole core 1. Thirdly, the polyester film 7 can also serve as an electrolyte infiltration layer, which helps ensure that the electrolyte is evenly distributed inside the battery cell and provides sufficient electrolyte conductivity, thereby increasing the life of the battery cell.

[0050] In some embodiments, as Figure 1 as well as Figure 2As shown, the external insulating component 9 may include a blue film 91, a first pole top patch 92 and a second pole top patch 93. The blue film 91 is coated on the outside of the shell 8 and serves as the outermost protective film of the battery cell. It uses an insulating material to separate the battery cells from each other to prevent the failure of a single battery cell from affecting other battery cells during the production of the battery. The blue film 91 can also play a role in dustproof and waterproofing. The first pole top patch 92 and the second pole top patch 93 are respectively arranged on the outside of the first pole cover 2 and the second pole cover 3. They can be made of aluminum foil. Their main function is to protect the structure and internal components of the battery cell from being affected by external physical, chemical and temperature factors.

[0051] The present utility model also discloses a battery (not shown in the figure), comprising at least one battery cell disclosed in the above embodiment, and the battery cells can be arranged in a matrix. Since the battery cells are described in detail in the above embodiment, they will not be repeated here. Due to the use of the above battery cells, the explosion-proof performance of the battery is also significantly improved.

[0052] The present utility model also discloses a car (not shown in the figure), including an electric drive and the battery disclosed in the above embodiment, the battery and the electric drive are electrically connected. Due to the use of the above battery with significantly improved explosion-proof performance, the safety of the car is also better guaranteed.

[0053] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and such modifications or substitutions should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A battery cell, characterized in that: include: A pole core, wherein two opposite side surfaces of the pole core are respectively configured as a first pole and a second pole; a first pole cover plate, disposed on one side of the first pole; an explosion-proof valve, disposed on the first pole cover plate, the explosion-proof valve having an exhaust port for pressure relief, the exhaust port penetrating the first pole cover plate; as well as A spacer is provided between the first pole cover and the first pole of the pole core to isolate the first pole of the pole core from the first pole cover, and the spacer has a through hole arranged opposite to the exhaust port of the explosion-proof valve.

2. The battery cell according to claim 1, characterized in that A first exhaust channel and a second exhaust channel are formed between the spacer and the first pole cover plate.

3. The battery cell according to claim 2, characterized in that The spacer includes a main body, a first side and a second side; the main body is arranged opposite to the first pole cover, the first side is connected to a short side of the main body, the second side is connected to two long sides of the main body, and the first side and the second side are arranged on a side of the main body close to the first pole cover; the first exhaust channel is formed between the first side and the first pole cover, and the second exhaust channel is formed between the second side and the first pole cover.

4. The battery cell according to claim 3, characterized in that The spacer also includes a first exhaust groove and a second exhaust groove; the first exhaust groove is formed by the end surface of the first side away from the main body being recessed in the direction close to the main body, and the second exhaust groove is formed by the end surface of the second side away from the main body being recessed in the direction close to the main body; one end of the first side away from the main body abuts against the first pole cover plate, and one end of the second side away from the main body abuts against the first pole cover plate, so that the first exhaust channel is formed between the first exhaust groove and the first pole cover plate, and the second exhaust channel is formed between the second exhaust groove and the first pole cover plate.

5. The battery cell according to claim 4, characterized in that: The main body includes a first main body and a second main body connected to the first main body, the through hole is set on the first main body, the first side and the second side are connected to the first main body, so that the first exhaust groove and the second exhaust groove are set around the through hole.

6. The battery cell according to claim 5, characterized in that The battery cell also includes a lower plastic, which is arranged on the first pole cover and on a side of the first pole cover close to the spacer. The lower plastic is away from the exhaust port of the explosion-proof valve and is arranged opposite to the second body of the main body so that the second body abuts against the lower plastic.

7. The battery cell according to claim 1, characterized in that The battery core further comprises a polyester film, and the polyester film is coated on the pole core.

8. The battery cell according to claim 7, characterized in that: The battery core further includes a shell, which is sleeved on the outer side of the polyester film.

9. A battery, characterized in that: The invention comprises at least one battery cell according to any one of claims 1 to 8, wherein the battery cells are arranged in a matrix.

10. An automobile, characterized in that: The invention comprises the battery and the electric driver according to claim 9, wherein the battery is electrically connected to the electric driver.

Images