阅读说明：本技术 一种电池二次保护的装置 (Battery secondary protection device ) 是由 吴志远 党奎 于 2021-01-25 设计创作，主要内容包括：本发明公开了一种电池二次保护的装置,包括电池模组、采集线、连接件和BMS,所述电池模组上连接所述采集线,所述采集线通过连接件连接BMS,所述连接件包括第一对配连接器、第二对配连接器及保护转接板；所述保护连接板包括第一连接器、第二连接器、PCB及保险；所述第一连接器和所述第二连接器均设置在所述PCB的上方,且所述第一连接器和所述第二连接器之间连接有保险；所述第一对配连接器一端连接相适配的第一连接器,另一端连接采集线；所述第二对配连接器一端连接相适配的第二连接器,另一端连接BMS。本发明通过利用设置有保险的保护转接板来对电池模组进行二次保护,且保护转接板结构简单,使用方便。(The invention discloses a device for secondary protection of a battery, which comprises a battery module, an acquisition line, a connecting piece and a BMS (battery management system), wherein the acquisition line is connected on the battery module and is connected with the BMS through the connecting piece; the protection connecting plate comprises a first connector, a second connector, a PCB and a fuse; the first connector and the second connector are both arranged above the PCB, and a fuse is connected between the first connector and the second connector; one end of the first mating connector is connected with the matched first connector, and the other end of the first mating connector is connected with the acquisition line; one end of the second mating connector is connected with the second connector which is matched with the second mating connector, and the other end of the second mating connector is connected with the BMS. The battery module is secondarily protected by the protective adapter plate with a safety, and the protective adapter plate is simple in structure and convenient to use.)

1. A device for secondary protection of a battery comprises a battery module (1), a collection line (2), a connecting piece and a BMS (6), wherein the battery module (1) is connected with the collection line (2), and the collection line (2) is connected with the BMS (6) through the connecting piece, and is characterized in that the connecting piece comprises a first mating connector (3), a second mating connector (5) and a protection adapter plate (4); the protection adapter plate (4) comprises a first connector (44), a second connector (42), a PCB (41) and a fuse (43);

the first connector (44) and the second connector (42) are both arranged above the PCB (41), and a fuse (43) is connected between the first connector (44) and the second connector (42);

one end of the first mating connector (3) is connected with the matched first connector (44), and the other end of the first mating connector is connected with the acquisition line (2); one end of the second matching connector (5) is connected with the second connector (42) which is matched with the second connector, and the other end of the second matching connector is connected with the BMS (6).

2. The device for secondary battery protection according to claim 1, wherein the first connector (44) is provided with n pins I (441), n is greater than or equal to 1 and is a natural number, and one end of each pin I (441) is welded on the PCB (41); the second connector (42) is provided with n pins II (421), and one end of each pin II (421) is welded on the PCB (41).

3. The device for secondary battery protection according to claim 2, wherein the pin i (441) and the pin ii (421) are both provided in an L-shape.

4. The battery secondary protection apparatus according to claim 2, wherein the other end of the pin i (441) and the other end of the pin ii (421) are respectively provided on opposite surfaces of the first connector (44) and the second connector (42).

5. The battery secondary protection device according to claim 2, characterized in that a fuse (43) is connected between corresponding two of the pins i (441) and ii (421).

6. The battery secondary protection device according to claim 1, wherein the fuse (43) is disposed at an inner layer of the PCB (41).

7. The battery secondary protection device according to claim 1, characterized in that the interface of the first mating connector (3) and the interface of the second mating connector (5) are adapted.

8. The device for secondary protection of batteries according to claim 1, characterized in that any one of the cell tabs in the battery module (1) is connected to the collecting line (2).

Technical Field

The invention relates to the technical field of battery protection, in particular to a device for secondary battery protection.

Background

Under the promotion of national policies, new energy batteries are continuously developed, and the protection of the batteries is particularly important for the high-speed development of the new energy batteries.

At present, battery protection is mainly performed by connecting a battery module to a BMS (battery management system) and monitoring and managing a battery using the BMS. Be connected with between the BMS at battery module and gather the pencil, the pencil collection that mainly utilizes has several kinds of modes at present. The first wire harness collection is not provided with a safety, the disconnection function cannot be realized in the mode, and the risk of fire hazard can be caused when the collection wire harness is short-circuited; secondly, when the wire harness is collected, the insurance is added to a single wire harness, the disconnection function can be realized in the mode, but the workload is large, and the automatic production is difficult; the third type of wire harness collection adopts an FPC (flexible printed circuit) mode, and the mode has a safety function, but is high in cost and inconvenient to maintain.

Disclosure of Invention

The invention aims to provide a device for secondary protection of a battery, which can solve the problems of fire risk, large workload and inconvenient maintenance in a wire harness acquisition mode in the prior art.

The purpose of the invention is realized by the following technical scheme:

the invention provides a device for secondary protection of a battery, which comprises a battery module, an acquisition line, a connecting piece and a BMS (battery management system), wherein the acquisition line is connected on the battery module and is connected with the BMS through the connecting piece; the protection connecting plate comprises a first connector, a second connector, a PCB and a fuse;

the first connector and the second connector are both arranged above the PCB, and a fuse is connected between the first connector and the second connector;

one end of the first mating connector is connected with the matched first connector, and the other end of the first mating connector is connected with the acquisition line; one end of the second mating connector is connected with the second connector which is matched with the second mating connector, and the other end of the second mating connector is connected with the BMS.

Furthermore, the first connector is provided with n pins I, n is not less than 1 and is a natural number, and one end of each pin I is welded on the PCB; the second connector is provided with n pins II, and one ends of the pins II are welded on the PCB.

Furthermore, stitch I and stitch II all set up to the L type.

Furthermore, the other end of the pin I and the other end of the pin II are respectively arranged on two opposite surfaces of the first connector and the second connector.

Furthermore, a fuse is connected between two corresponding pins of the pin I and the pin II.

Further, the fuse is arranged in an inner layer of the PCB.

Further, the interface of the first mating connector is matched with the interface of the second mating connector.

Further, any one of the battery cell tabs in the battery module is connected with the acquisition line.

According to the invention, the detachable protection adapter plate is additionally arranged between the battery module and the BMS, and the safety is arranged in the protection adapter plate, so that the battery and the BMS are protected doubly. Can at first fuse the insurance of keysets when a certain point short circuit is gathered to the circuit, can not carry out functional injury to battery and BMS, fine protection battery module and BMS can the lug connection carry out functional use after troubleshooting. When the project requirement is low, the protection adapter plate can be selected not to be installed. The battery module is secondarily protected by the protection adapter plate with the fuse, so that the problem that the fuse is required to be added by a single wire harness during wire harness collection is solved, and meanwhile, the protection adapter plate is simple in structure and convenient to use.

Drawings

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

Fig. 1 is a schematic view showing the overall structure of a device for secondary protection of a battery according to the present invention;

fig. 2 is a schematic structural diagram of the protection adapter plate of the present invention.

The reference numbers are as follows:

1-battery module, 2-collection line, 3-first mating connector, 4-protection adapter plate, 5-second mating connector, 6-BMS, 41-PCB, 42-second connector, 43-safety, 44-first connector, 421-pin II, 441-pin I.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1, a device for secondary protection of a battery includes a battery module 1, a collecting line 2, a connecting member and a BMS6, the collecting line 2 is connected to the battery module 1, and the collecting line 2 is connected to a BMS6 through the connecting member, wherein the connecting member includes a first mating connector 43, a second mating connector 5 and a protection adapter plate 4.

Referring to fig. 2, the protection adapter board 4 includes a first connector 44, a second connector 42, a PCB41 and a fuse 43; the first connector 44 and the second connector 42 are both disposed above the PCB41, and a fuse 43 is connected between the first connector 44 and the second connector 42.

As shown in fig. 1, one end of the first mating connector 3 is connected to the first connector 44, and the other end is connected to the collection line 2; the second mating connector 5 has one end connected to the mating second connector 42 and the other end connected to the BMS 6.

In specific implementation, the first connector 44 is provided with n pins i 441, n is greater than or equal to 1 and is a natural number, and one end of each pin i 441 is welded on the PCB 41; the second connector 42 is provided with n pins II 421, and one end of each pin II 421 is welded on the PCB 41.

It should be noted that the number of the pins i depends on the structure of the first mating connector 3 connected by the first connector 44, and the structure of the first mating connector 3 depends on the connected battery module 1. The number of the pins i depends on the battery module 1.

Preferably, the pin I441 and the pin II 421 are both arranged in an L shape.

In a specific implementation, the other end of the pin i 441 and the other end of the pin ii 421 are respectively disposed on two opposite surfaces of the first connector 44 and the second connector 42. The connected fuse 43 can be made more convenient and simpler in design process.

In a specific implementation, as shown in fig. 2, a fuse 43 is connected between two corresponding pins i 441 and ii 421. Can at first fuse the insurance 43 of keysets when a certain point short circuit is gathered to the circuit, can not carry out functional injury to battery module and BMS6, fine protection battery module 1 and BMS2, can the lug connection carry out functional use after troubleshooting.

In addition, when the abnormal conditions of high voltage and large current are encountered in the collecting line, the fuse 43 is automatically cut off to protect both the battery module 1 and the BMS 6.

In particular, the fuse 43 is disposed on an inner layer of the PCB 41. The fuse 43 is a very thin line in the PCB, a rated current of the line is tested in advance, and when the line is short-circuited or an abnormal current passes through the line, the fuse 43 is disconnected after the rated current is exceeded, thereby protecting the battery module 1 and the BMS 6.

In a specific implementation, the interface of the first mating connector 3 is adapted to the interface of the second mating connector 5.

It should be noted that the protection adapter plate 4 can be detached quickly, for example, when the requirement on the project is not high or the customer specifies again, the protection adapter plate 4 can be optionally detached, and the interface of the first mating connector 3 and the interface of the second mating connector 5 are directly used for direct docking.

Specifically, any one of the battery cell tabs in the battery module 1 is connected with the collection line 2.

According to the invention, the detachable protection adapter plate is additionally arranged between the battery module and the BMS, and the safety is arranged in the protection adapter plate, so that the battery and the BMS are protected doubly. Can at first fuse the insurance of keysets when a certain point short circuit is gathered to the circuit, can not carry out functional injury to battery and BMS, fine protection battery module and BMS can the lug connection carry out functional use after troubleshooting. When the project requirement is low, the protection adapter plate can be selected not to be installed. The battery module is secondarily protected by the protection adapter plate with the fuse, so that the problem that the fuse is required to be added by a single wire harness during wire harness collection is solved, and meanwhile, the protection adapter plate is simple in structure and convenient to use.

In addition, the above detailed description is provided for the device for secondary battery protection according to the embodiments of the present invention, and the principle and the implementation manner of the present invention should be described herein by using specific examples, and the above description of the embodiments is only provided to help understanding the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.