CN217788711U

CN217788711U - Square lithium ion battery component with connector

Info

Publication number: CN217788711U
Application number: CN202220499152.0U
Authority: CN
Inventors: 潘敏
Original assignee: Shaanxi Yuhe Electronic Engineering Co ltd
Current assignee: Shaanxi Yuhe Electronic Engineering Co ltd
Priority date: 2022-03-09
Filing date: 2022-03-09
Publication date: 2022-11-11
Anticipated expiration: 2032-03-09

Abstract

The application provides a square lithium ion battery pack with a connector, which comprises a battery body, a protective device and a connecting lead, wherein the connecting lead is electrically connected with the battery body and is provided with the connector; the protective device is a square protective shell which is formed by detachably connecting a shell body and a shell cover and is used for installing a battery body, a sealing component which is used for sealing and protecting the shell body after being connected is arranged at the bottom end of the shell cover, a plurality of radiating grooves are arranged at the top end of the shell cover, and a heat conducting plate which is contacted with the battery body is arranged at the bottom end of the shell cover; the battery body comprises a plurality of battery monomers which are electrically connected together through wires, the battery monomers are arranged in the shell in a staggered mode, cavities are formed between the battery monomers and the side wall of the shell respectively, and the connecting wires are arranged on the front side of the shell in a drawable mode and are coated with insulating sheaths outside the shell. This application can compromise the thermal diffusivity when guaranteeing the leakproofness, and the battery body in the protector can not be in high humidity, high temperature environment, and the performance of lithium ion battery group can not receive the influence.

Description

Square lithium ion battery component with connector

Technical Field

The application relates to the technical field of lithium ion batteries, in particular to a square lithium ion battery assembly with a connector.

Background

A lithium ion battery is a type of secondary battery that mainly operates by movement of lithium ions between a positive electrode and a negative electrode. The lithium ion battery can be made into flat rectangles, cylinders, rectangles and buckles according to the requirements of different electronic products, and can be a lithium ion battery pack formed by connecting a plurality of lithium ion batteries in series and in parallel.

Need place in the casing and use behind the closed cap behind the lithium ion battery group spare lithium ion battery group, bolted connection or ultrasonic bonding's mode is often adopted with the fixed of cap to current casing, and the casing that adopts the ultrasonic bonding mode to fix is difficult to dismantle with the cap, and the casing that adopts the bolted connection mode to fix is not good with cap sealing performance and heat dispersion, leads to the humidity, the high temperature of the environment that lithium ion battery group locates easily, and then influences lithium ion battery group's performance.

SUMMERY OF THE UTILITY MODEL

The application provides a square lithium ion battery pack with connector for solve current casing that adopts the bolted connection mode to fix and cap sealing performance and heat dispersion not good, lead to the humidity, the high temperature of lithium ion battery pack place environment easily, and then influence the problem of the performance of lithium ion battery pack.

The application provides a square lithium ion battery pack with a connector, which comprises a battery body, a protective device and a connecting lead, wherein the connecting lead is electrically connected with the battery body and is provided with the connector;

the protection device is a square protection shell which is formed by detachably connecting a shell body and a shell cover and is used for installing a battery body, a sealing component which is used for sealing and protecting the shell body after being connected is arranged at the bottom end of the shell cover, a plurality of concave heat dissipation grooves are uniformly arranged at the top end of the shell cover, and a heat conduction plate which is contacted with the battery body is arranged at the bottom end of the shell cover in a position corresponding to the covering area of the plurality of heat dissipation grooves;

the battery body comprises a plurality of battery monomers which are electrically connected together through conducting wires, the battery monomers are arranged in the shell in a staggered mode, cavities which are beneficial to heat dissipation are formed between the battery monomers and the side wall of the shell respectively, and the connecting conducting wires are arranged on the front side of the shell in a drawable mode and are coated with insulating sheaths outside the shell.

In an embodiment of the present application, a seal assembly includes a snap ring, a first seal ring, and a second seal ring;

the bottom of cap sets up the downward bellied snap ring of round, and the lateral wall of snap ring is provided with first sealing washer, and the recess with the snap ring looks adaptation that has first sealing washer is seted up on casing lateral wall top, through snap ring and groove looks joint between cap and the casing, the bottom of cap in the inboard interval of snap ring be provided with casing inside wall looks butt second sealing washer.

In one embodiment of the application, each battery cell is a square lithium ion battery with the same specification and size, the battery cells are connected in parallel through a lead to form a battery body, and a connecting lead is connected with an external power device through a connector;

the inside bottom of casing is provided with a plurality of L type baffles that arrange in proper order and left and right side is crisscross around, and the bottom of L type baffle links firmly at the bottom upper surface of casing, a plurality of L type baffles respectively with the casing wherein constitute between one side inside wall and be used for the free district of placing of card discharge cell, battery monomer and the opposite side of casing constitute the cavity region, L type baffle inside wall and battery monomer looks butt.

In an embodiment of the present application, the heat dissipation grooves are rectangular, and a plurality of heat dissipation grooves are arranged in parallel on the top end of the housing cover, and the opening depth of the heat dissipation grooves is half of the thickness of the housing cover.

In an embodiment of the present application, a wire outlet hole is formed in a front side wall of the housing, the connection wire extends out of the housing through the wire outlet hole, and a third sealing ring is disposed at a contact position of the wire outlet hole and the connection wire.

In an embodiment of the present application, the snap ring with the first sealing ring is in an interference fit with the groove.

In one embodiment of the present application, the heat-conducting plate is made of a copper-aluminum alloy.

In an embodiment of the application, bolts are movably mounted at four corners of the housing cover, connecting holes matched with the bolts are respectively formed in the top end of the side wall of the housing body, and the housing cover is connected with the housing body through the bolts.

In an embodiment of the present application, the insulating sheath outside the connecting wire is a sheath made of an insulating material, the insulating material is selected from one of polyvinyl chloride, resin and rubber, and the outer diameter of the insulating sheath is adapted to the diameter of the third sealing ring arranged in the wire outlet.

The application provides a square lithium ion battery subassembly with connector, through be provided with the seal assembly who is used for sealing the protection after being connected with the casing in the bottom of cap, seal assembly can prevent that steam from getting into in the casing from the clearance of casing and cap, makes the battery body in the protector can not be in the high humid environment. And, this application is through evenly being provided with the radiating groove of a plurality of indents on the top of cap, and the bottom of cap is provided with the heat-conducting plate that contacts with the battery body in the region of coverage position that corresponds a plurality of radiating grooves, can release the heat that the battery body work was gived off outside the cap through heat-conducting plate and radiating groove, has improved the thermal diffusivity, and the battery body in the protector can not be in high temperature environment. In addition, each battery monomer is arranged in the shell in a staggered mode, and a cavity is formed between each battery monomer and the side wall of the shell respectively, so that heat dissipation can be facilitated. This application can compromise the thermal diffusivity when guaranteeing the leakproofness, and the battery body in the protector can not be in high humidity, high temperature environment, and the performance of lithium ion battery group can not receive the influence.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is an exploded view of a rectangular lithium ion battery module with a connector according to one embodiment of the present disclosure;

FIG. 2 is a schematic perspective view of a rectangular lithium ion battery module with a connector according to an embodiment of the present disclosure;

FIG. 3 is a schematic cross-sectional view at A in FIG. 1;

fig. 4 is an exploded schematic view of a protection device according to an embodiment of the present application.

Description of reference numerals: 1. a housing; 11. a groove; 12. a wire outlet hole; 13. an L-shaped baffle plate; 2. a shell cover; 21. a snap ring; 211. a first seal ring; 22. a second seal ring; 23. a heat sink; 24. a heat conducting plate; 3. a third seal ring; 4. a bolt; 10. a battery body; 101. a battery cell; 20. connecting a lead; 30. a connector assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort also belong to the protection scope of the present application.

An embodiment of the present application provides a square type lithium ion battery pack with a connector, as shown in fig. 1 and 2, including a battery body 10, a protection device, and a connecting lead 20 electrically connected to the battery body 10 and having a connector 30, wherein one end of the connecting lead 20 is electrically connected to the battery body 10, and the other end of the connecting lead 20 is electrically connected to the connector 30.

The protection device is a square protection shell which is formed by detachably connecting the shell body 1 and the shell cover 2 and is used for installing the battery body 10, and the square protection shell can contain more lithium ion batteries. The bottom end of the shell cover 2 is provided with a sealing component for sealing and protecting the shell 1 after being connected. The sealing assembly can prevent moisture from entering the case 1 from the gap between the case 1 and the case cover 2, so that the battery body 10 in the protection device is not exposed to a high-humidity environment.

The top of cap 2 evenly is provided with the radiating groove 23 of a plurality of indents, and the bottom of cap 2 is provided with the heat-conducting plate 24 that contacts with battery body 10 in the coverage area position that corresponds a plurality of radiating grooves 23, and this application can release the heat that battery body 10 work was gived off outside cap 2 through heat-conducting plate 24 and radiating groove 23, can compromise the thermal diffusivity when guaranteeing the leakproofness, and battery body 10 in the protector can not be in high temperature environment.

The battery body 10 comprises a plurality of battery monomers 101 which are electrically connected together through conducting wires, each battery monomer 101 is arranged in the shell 1 in a staggered mode, the overlapping area of two adjacent battery monomers 101 can be reduced due to the staggered arrangement of each battery monomer 101, heat accumulation is prevented, cavities which are beneficial to heat dissipation are formed between each battery monomer 101 and the side wall of the shell 1 respectively, and heat generated by the battery monomers 101 can be transmitted to the outside of the shell 1 through the cavities in time.

The connecting wires 20 are arranged at the front side of the shell 1 in a drawable manner, an insulating sheath is wrapped outside the connecting wires 20, a space for drawing and recovering the connecting wires 20 is reserved between the single batteries 101 at the front side in the shell 1 and the inner side wall at the front side of the shell 1, and the drawable design of the connecting wires 20 can enable the lithium ion battery pack to be suitable for more power utilization scenes.

When the square lithium ion battery pack with the connector is installed, firstly, the plurality of battery monomers 101 are placed in the shell 1 in a staggered mode, then the sealing assembly on the shell cover 2 is aligned to the shell 1, the shell cover 2 and the shell 1 are installed, and finally the shell cover 2 and the shell 1 are detachably connected to fix the shell cover 2 and the shell 1.

According to the square lithium ion battery pack with the connector, the sealing assembly used for sealing and protecting the shell 1 after being connected is arranged at the bottom end of the shell cover 2, and the sealing assembly can prevent water vapor from entering the shell 1 from a gap between the shell 1 and the shell cover 2, so that a battery body 10 in the protecting device cannot be in a high-humidity environment. And, this application is through evenly being provided with the radiating groove 23 of a plurality of indents on the top at cap 2, and the bottom of cap 2 is provided with the heat-conducting plate 24 that contacts with battery body 10 in the coverage area position that corresponds a plurality of radiating grooves 23, can release the heat that battery body 10 work was gived off to cap 2 outside through heat-conducting plate 24 and radiating groove 23, has improved the thermal diffusivity, and battery body 10 in the protector can not be in high temperature environment. In addition, the battery cells 101 are staggered in the housing 1, and cavities are formed between the battery cells 101 and the side wall of the housing 1, so that heat dissipation is facilitated. This application can compromise the thermal diffusivity when guaranteeing the leakproofness, and the battery body in the protector can not be in high humidity, high temperature environment, and lithium ion battery group's performance can not receive the influence.

In some embodiments, as shown in fig. 1 and 3, the seal assembly includes a snap ring 21, a first seal ring 211, and a second seal ring 22.

The bottom of cap 2 sets up the bellied snap ring 21 downwards of round, and the lateral wall of snap ring 21 is provided with first sealing washer 211, and first sealing washer 211 for example can be that the rubber circle cover is established on snap ring 21 lateral wall. The recess 11 with the 21 looks adaptations of snap ring that have first sealing washer 211 is seted up on 1 lateral wall top of casing, through snap ring 21 and recess 11 looks joint between cap 2 and the casing 1, realizes inseparable joint between cap 2 and the casing 1, and the clearance makes protector's sealing performance good between cap 2 and the casing 1 for a short time.

The bottom end of the shell cover 2 is provided with a second sealing ring 22 which is abutted against the inner side wall of the shell 1 at intervals on the inner side of the clamping ring 21, and the second sealing ring 22 can be a rubber ring which has the same shape and size with the inner wall of the shell 1 and is adhered to the bottom end of the shell cover 2. When the structure of snap ring 21, first sealing washer 211 or recess 11 damages, when having steam to pass through casing 1 and cap 2 junction, second sealing washer 22 is used for blockking in steam gets into casing 1, and the setting of second sealing washer 22 can further protect battery body 10 not to receive the steam to corrode.

In some embodiments, as shown in fig. 1 and 4, each battery cell 101 is a square lithium ion battery with the same size, the battery cells 101 are connected in parallel through a lead to form a battery body 10, and the connection lead 20 is connected to an external power device through a connector 30. Compared with the common lithium ion battery pack with the charging and discharging positive electrode and the charging and discharging negative electrode on the battery body, the lithium ion battery pack with the connector 30 is also provided with the connecting lead 20 and the connector 30, can also output electric energy by using the connecting lead 20, and is suitable for more power utilization scenes.

The bottom end inside the shell 1 is provided with a plurality of L-shaped baffles 13 which are sequentially arranged from front to back and staggered left and right, the bottom ends of the L-shaped baffles 13 are fixedly connected to the upper surface of the bottom end of the shell 1, a plurality of L-shaped baffles 13 respectively form a placing area used for clamping the discharge cell units 101 with the inner side wall of one side of the shell 1, the battery units 101 and the other side of the shell 1 form a cavity area so as to be better heat dissipation, the inner side wall of each L-shaped baffle 13 is abutted to the corresponding battery unit 101, meanwhile, the outer side wall of each L-shaped baffle 13 is abutted to the adjacent battery unit 101, and the L-shaped baffles 13 are used for fixing the battery units 101. Moreover, due to the existence of the L-shaped baffle 13, a narrow gap is left between the battery cells 101, so that the wires can be conveniently placed when the battery cells 101 are connected through the wires, and the wires inside the shell 1 are distributed more neatly.

In some embodiments, as shown in fig. 1 and 3, the heat dissipation grooves 23 are rectangular to adapt to the shape of the battery cells 101, a plurality of heat dissipation grooves 23 are arranged on the top end of the housing cover 2 side by side, and each heat dissipation groove 23 corresponds to a battery cell 101 staggered in the housing 1. The degree of depth of seting up of radiating groove 23 is half of cap 2 thickness, if the degree of depth of seting up of radiating groove 23 is too shallow then the radiating effect is not good, if the degree of depth of seting up of radiating groove 23 is too deep then the stability of cap 2 is not good, and it is comparatively suitable to consider comprehensively that the degree of depth of seting up of radiating groove 23 is about half of cap 2 thickness.

In some embodiments, as shown in fig. 1, fig. 2 and fig. 4, a wire outlet 12 is formed on a front side wall of the housing 1, a connection wire 20 extends out of the housing 1 through the wire outlet 12, and a third sealing ring 3 is disposed at a contact position of the wire outlet 12 and the connection wire 20. When the square lithium ion battery pack with the connector provided by the embodiment is mounted, firstly, one end of the connecting wire 20 is electrically connected with the battery body 10, then the battery body 10 is placed in the shell 1, then, one end of the connecting wire 20 far away from the battery body 10 is taken out from the wire outlet 12, then, the connector 30 is mounted at one end of the connecting wire 20 far away from the battery body 10, and finally, the top end of the shell 1 is clamped with the shell cover 2 and fixed. In order to ensure that the connecting wire 20 smoothly passes through the wire outlet hole 12, the diameter of the wire outlet hole 12 needs to be larger than that of the connecting wire 20, the third sealing ring 3 is arranged to fill a gap between the wire outlet hole 12 and the connecting wire 20, so as to improve the sealing performance of the housing 1 at the wire outlet hole 12, and the third sealing ring 3 may be a rubber ring, for example.

In some embodiments, as shown in fig. 3, the snap ring 21 with the first sealing ring 211 is in an interference fit with the groove 11, that is, the width of the groove 11 on the housing 1 is slightly smaller than the sum of the widths of the snap ring 21 and the first sealing ring 211, so that the housing cover 2 needs to be pressed hard when the housing cover 2 is mounted, because the first sealing ring 211 has elasticity and can be compressed to enter the groove 11, the first sealing ring 211 recovers its shape after the housing cover 2 is loosened, a gap between the groove 11 and the snap ring 21 is filled, the sealing performance of the connection between the housing 1 and the housing cover 2 is improved, and water vapor is not easy to enter the housing 1.

In some embodiments, as shown in fig. 3, the thermally conductive plate 24 is made of a copper aluminum alloy. The heat generated by the battery body 10 during operation is transferred to the outer surface of the case cover 2 by the heat conducting plate 24, and in other embodiments, heat dissipating fins may be disposed above the heat dissipating grooves 23 to increase the heat dissipating area and enhance the heat dissipating effect.

In some embodiments, as shown in fig. 1 and 2, a bolt 4 is movably mounted at each of four corners of the housing cover 2, a connecting hole matched with the bolt 4 is formed at the top end of the side wall of the housing 1, the housing cover 2 and the housing 1 are connected by the bolt 4, the bolt connection is detachable, the housing cover 2 and the housing 1 can be conveniently separated, and then the battery body 10 in the housing 1 can be taken out for replacement, etc. Can increase the stability of casing 1 and cap 2 after connecting, prevent that the foreign object from colliding with the condition that makes the cap 2 of joint drop and taking place. In addition, the bolt connection between the shell 1 and the shell cover 2 can be positioned through the groove 11 and the clamping ring 21, after the clamping ring 21 of the shell cover 2 is clamped into the groove 11 of the shell 1, the connecting holes for connecting the bolts 4 on the shell cover 2 and the shell 1 are automatically aligned, and the bolts 4 are not required to be used for aligning the holes difficultly.

In some embodiments, as shown in fig. 1, the insulating sheath outside the connecting lead 20 is made of an insulating material selected from one of polyvinyl chloride, resin, and rubber, and has an outer diameter corresponding to the diameter of the third sealing ring 3 of the outlet hole 12. The insulating sheath protects the connecting leads 20 from damage, thereby extending the service life of the connecting leads 20.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A square lithium ion battery component with a connector is characterized by comprising a battery body (10), a protective device and a connecting lead (20) which is electrically connected with the battery body (10) and is provided with a connector (30);

the protection device is a square protection shell which is formed by detachably connecting a shell (1) and a shell cover (2) and is used for installing the battery body (10), a sealing assembly used for sealing and protecting the shell (1) after being connected is arranged at the bottom end of the shell cover (2), a plurality of concave heat dissipation grooves (23) are uniformly formed in the top end of the shell cover (2), and a heat conduction plate (24) which is in contact with the battery body (10) is arranged at the bottom end of the shell cover (2) in a position corresponding to the coverage area of the plurality of heat dissipation grooves (23);

the battery body (10) comprises a plurality of battery monomers (101) which are electrically connected together through conducting wires, the battery monomers (101) are arranged in the shell (1) in a staggered mode, cavities which are beneficial to heat dissipation are formed between the battery monomers (101) and the side wall of the shell (1) respectively, the connecting conducting wires (20) are arranged on the front side of the shell (1) in a drawable mode, and insulating sheaths are wrapped outside the connecting conducting wires;

the radiating grooves (23) are rectangular, the radiating grooves (23) are arranged at the top end of the shell cover (2) in parallel, and the depth of the radiating grooves (23) is half of the thickness of the shell cover (2).

2. The square lithium ion battery pack with connector assembly according to claim 1, wherein the sealing assembly comprises a snap ring (21), a first sealing ring (211) and a second sealing ring (22);

the bottom of cap (2) sets up the downward bellied of round snap ring (21), the lateral wall of snap ring (21) is provided with first sealing washer (211), casing (1) lateral wall top is seted up and is had first sealing washer (211) recess (11) of snap ring (21) looks adaptation, cap (2) with pass through between casing (1) snap ring (21) with recess (11) looks joint, the bottom of cap (2) in the inboard interval of snap ring (21) be provided with casing (1) inside wall looks butt second sealing washer (22).

3. The square lithium ion battery pack with the connector assembly according to claim 2, wherein each battery cell (101) is a square lithium ion battery with the same specification and size, the battery cells (101) are connected in parallel through a lead to form the battery body (10), and the connecting lead (20) is connected with an external power device through the connector assembly (30);

the inside bottom of casing (1) is provided with a plurality of L type baffles (13) that arrange in proper order and left and right side crisscross around, the bottom of L type baffle (13) links firmly the bottom upper surface of casing (1), and is a plurality of L type baffle (13) respectively with constitute between one of them side inside wall of casing (1) and be used for the card to put placing of battery monomer (101), battery monomer (101) with the opposite side of casing (1) constitutes the cavity region, L type baffle (13) inside wall with battery monomer (101) looks butt.

4. The square lithium ion battery component with the connector according to claim 1, wherein a wire outlet hole (12) is formed on a front side wall of the housing (1), the connecting wire (20) extends out of the housing (1) through the wire outlet hole (12), and a third sealing ring (3) is disposed at a contact position of the wire outlet hole (12) and the connecting wire (20).

5. The square lithium ion battery pack with connector according to claim 2, wherein the snap ring (21) with the first sealing ring (211) is in interference fit with the groove (11).

6. The square lithium ion battery pack with connectors according to claim 1, wherein the heat conducting plate (24) is made of a copper-aluminum alloy.

7. The square lithium ion battery pack with the connector according to any one of claims 1 to 6, wherein bolts (4) are movably mounted at four corners of the housing cover (2), connecting holes matched with the bolts (4) are respectively formed at the top end of the side wall of the housing (1), and the housing cover (2) is connected with the housing (1) through the bolts (4).

8. The square lithium ion battery pack with connector according to claim 4, wherein the insulating sheath outside the connecting lead (20) is a sheath made of an insulating material selected from one of polyvinyl chloride, resin, and rubber, and has an outer diameter corresponding to the diameter of the third gasket (3) disposed in the outlet hole (12).