Combined connecting plate, device and method for quickly assembling soft package battery and battery pack

Abstract

The embodiment of the invention provides a combined connecting plate, a device and a method for realizing rapid assembly of a soft package battery and a battery pack, the combined connecting plate is used for connecting a plurality of soft package battery monomers in series or in parallel, each soft package battery is provided with two tabs on the same side, the tabs are respectively a first tab and a second tab, and the combined connecting plate comprises a battery shell, a cover group, the combined connecting plate and an elastic adhesive tape; an opening is formed in one end of the battery shell and is overlapped and connected with the cover group; a cavity is formed in the battery shell and is used for accommodating N soft package battery monomers which are arranged side by side, the tabs face the opening direction, and N is greater than or equal to 2; the first tab and the second tab of each soft package battery monomer are bent and arranged on the elastic adhesive tape; the combined connecting plate comprises an upper end face and a lower end face, the upper end face is provided with a first output end contact and a second output end contact, the lower end face comprises 2N protruding tab contact points, and N is larger than or equal to 2; the cover group comprises a positive electrode output end and a negative electrode output end; and the elastic rubber strip, the tab, the combined connecting plate and the cover group are tightly connected through interference fit.

Description

Technical Field

[0001] The present invention relates to the field of batteries, and in particular to a combined connecting plate, a device and method for realizing rapid assembly of soft-pack batteries, and a battery pack. Background Art

[0002] Soft-pack batteries need to go through different parallel and series combinations to obtain specific capacity and voltage to meet specific usage conditions. For small load current and simple series structure, general connection methods can meet the usage requirements, such as using soldering to weld the positive and negative ears of two adjacent soft-pack batteries together, or they can be connected in series through wires or ultrasonic welding.

[0003] However, during the series connection process, multiple soft-pack batteries need to be placed in a positive and negative order, and inconsistent directions can easily lead to errors; multiple welding is required in a small space, which is difficult to operate and results in extremely low production efficiency; the welding points need to be covered with insulators to prevent short circuits. If the covering is not in place, there is a risk of short circuit or even fire. Summary of the invention

[0004] In view of this, the embodiments of the present invention provide a combined connecting plate, a device and method for realizing rapid assembly of soft-pack batteries, and a battery pack, which can save a lot of manpower, improve production efficiency, and realize automated production.

[0005] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0006] In a first aspect, an embodiment of the present invention provides a soft-pack battery assembly connection plate, comprising: an upper end surface and a lower end surface;

[0007] The upper end surface includes a first output terminal contact and a second output terminal contact;

[0008] The lower end surface includes 2N tab contact points, N≥2;

[0009] The plurality of tab contacts are respectively connected in series or in parallel to the first output end contact and the second output end contact.

[0010] Preferably, the tab contact points on the lower end surface are arranged to be two in the horizontal direction and N in the vertical direction; wherein the two tab contact points in the horizontal direction correspond one to one to the positions of the two tabs of the soft-pack battery.

[0011] Preferably, the tab contact point and the tab size are matched.

[0012] Preferably, the tab contact points on the lower end surface are arranged in two lateral directions, and any two lateral tab contact points are connected via a diode.

[0013] In the second aspect, an embodiment of the present invention provides a device for realizing rapid assembly of soft-pack batteries, which is used to connect multiple soft-pack battery cells in series or in parallel, each soft-pack battery having two pole ears on the same side, namely a first pole ear and a second pole ear, comprising: a battery shell, a cover group, a combined connecting plate and an elastic rubber strip; an opening is provided at one end of the battery shell, and the opening is overlapped and connected with the cover group; a cavity is provided in the battery shell, for accommodating N soft-pack battery cells arranged side by side, wherein the pole ears face the opening direction, wherein N≥2; the first pole ear and the second pole ear of each soft-pack battery cell are bent and placed on the elastic rubber strip; the combined connecting plate comprises an upper end face and a lower end face, the upper end face is provided with a first output terminal contact and a second output terminal contact, and the lower end face comprises 2N raised pole ear contact points, N≥2; the cover group comprises a positive output terminal and a negative output terminal; the elastic rubber strip, the pole ears, the combined connecting plate and the cover group are kept tightly connected by interference fit.

[0014] Preferably, the tabs corresponding to each soft-pack battery cell are tightly connected to the tab contact points respectively.

[0015] Preferably, the battery shell and the cover assembly are bent, riveted or welded.

[0016] Preferably, the first output terminal contact is connected to the positive output terminal, and the second output contact is connected to the negative output terminal.

[0017] In a third aspect, an embodiment of the present invention provides a method for realizing rapid assembly of a soft-pack battery, the method comprising:

[0018] Place N soft-pack battery cells in a battery case in a side-by-side arrangement, with the tabs facing the open end of the battery case, wherein N ≥ 2;

[0019] An elastic rubber strip is placed at one end of the pole ear of each soft-pack battery cell, and the first pole ear and the second pole ear are bent in the same direction and placed on the elastic rubber strip;

[0020] A combined connecting plate is installed, wherein the tab contact points of the combined connecting plate correspond to the tabs of each soft-pack battery cell respectively; wherein the combined connecting plate comprises an upper end surface and a lower end surface, the upper end surface is provided with a first output terminal contact point and a second output terminal contact point, and the lower end surface comprises 2N raised tab contact points, N≥2;

[0021] The cover group is installed, wherein the cover group includes a positive output terminal and a negative output terminal, the first output terminal contact is connected to the positive output terminal, and the second output contact is connected to the negative output terminal.

[0022] The battery shell opening is welded and fixed to the cover assembly.

[0023] In a fourth aspect, an embodiment of the present invention provides a soft-pack battery pack, comprising:

[0024] N soft-pack battery cells arranged in a side-by-side arrangement and a device for realizing rapid assembly of soft-pack batteries as described in any one of the present inventions.

[0025] The embodiment of the present invention provides a combined connecting plate, a device and method for realizing rapid assembly of soft-pack batteries, and a battery pack, which are used to connect multiple soft-pack battery cells in series or in parallel, each soft-pack battery has two pole ears on the same side, namely a first pole ear and a second pole ear, and include: a battery shell, a cover group, a combined connecting plate and an elastic rubber strip; an opening is provided at one end of the battery shell, and the opening is overlapped and connected with the cover group; a cavity is provided in the battery shell, which is used to accommodate N soft-pack battery cells arranged in a side-by-side manner, wherein the pole ears face the opening direction, wherein N≥2; the first pole ear and the second pole ear of each soft-pack battery cell are bent and placed on the elastic rubber strip; the combined connecting plate includes an upper end face and a lower end face, the upper end face is provided with a first output terminal contact and a second output terminal contact, and the lower end face includes 2N raised pole ear contact points, wherein N≥2; the cover group includes a positive output terminal and a negative output terminal; the elastic rubber strip, the pole ears, the combined connecting plate, and the cover group are kept tightly connected by interference fit; a large amount of labor can be saved, the production efficiency can be improved, and automated production can be realized. Specifically,

[0026] 1. The combined connection board integrates multiple functions, and the overall electronic components occupy very little space; the input and output terminals and electronic components of the combined connection board are firmly and reliably integrated, eliminating poor connection; the use of the combined integrated connection board replaces the original cumbersome ear bending, welding, and insulating glue sticking processes. The standard outer dimensions of the connection board can realize rapid and automated assembly and production, greatly saving labor;

[0027] 2. The combined connection board circuit integrates PTC thermistors and multiple diodes. PTC can provide overcurrent and overload protection. When the current exceeds the rated value, PTC will disconnect the circuit in time to prevent damage to the battery circuit. The diode effectively prevents the battery from reverse charging and over-discharging, thereby protecting the battery circuit.

[0028] 3. The elastic strip has strong elasticity, is not easy to produce plastic deformation, and is not easy to be damaged, which ensures that there will be no failure such as poor contact after packaging;

[0029] 4. No welding is required, so there is no risk of battery failure due to heat transfer from welding into the battery.

[0030] 5. There is no need to reserve longer tabs for welding. Tabs can be cut to shorter sizes. There is no risk of tabs contacting each other inside the battery, thus completely eliminating the risk of internal short circuit and greatly improving battery safety.

[0031] 6. Each soft-pack battery cell is placed in the same direction, reducing the probability of manual orientation during the production process;

[0032] 7. Simplify the production process and greatly improve production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic diagram of the structure of a device for realizing rapid assembly of soft-pack batteries provided in one embodiment of the present invention;

[0034] Figure 2 It is a structural schematic diagram of a combined connecting plate provided in one embodiment of the present invention;

[0035] Figure 3 It is a structural schematic diagram of a combined connecting plate provided in another embodiment of the present invention;

[0036] Figure 4 A schematic diagram of circuit connection of a tab contact point of a combined connection plate provided in one embodiment of the present invention;

[0037] Figure 5 A schematic diagram of circuit connection of a tab contact point of a combined connection plate provided in another embodiment of the present invention;

[0038] Figure 6 It is a structural schematic diagram of a cover assembly provided in one embodiment of the present invention;

[0039] Figure 7 It is an assembly schematic diagram of a method for quickly assembling a soft-pack battery provided in one embodiment of the present invention.

[0040] In the figure, there are a soft-pack battery cell 100, a first pole ear 1, a second pole ear 2, a battery shell 3, a cover group 4, a combined connecting plate 5, an elastic rubber strip 6, an upper end surface 7, a lower end surface 8, a first output terminal contact 9, a second output terminal contact 10, a pole ear contact point 11, a positive output terminal 12, and a negative output terminal 13. DETAILED DESCRIPTION

[0041] In order to better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged or reduced, and do not represent the size of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood in specific circumstances. The technical solution of the present invention is further described below in conjunction with the drawings and embodiments.

[0042] See 1 to Figure 3 , In a first aspect, an embodiment of the present invention provides a soft-pack battery assembly connection plate, comprising: an upper end surface and a lower end surface;

[0043] The upper end surface includes a first output terminal contact and a second output terminal contact;

[0044] The lower end surface includes 2N tab contact points, N≥2;

[0045] The plurality of tab contacts are respectively connected in series or in parallel to the first output end contact and the second output end contact.

[0046] Here, the plurality of tab contacts are connected in series or in parallel to the first output terminal contact and the second output terminal contact, respectively. Figure 3 to Figure 4 Taking the series connection as an example, there are three soft-pack battery cells, corresponding to 6 tab contact points, of which the 6 tab contact points on the lower end face correspond to the positive pole A+ tab contact point and the negative pole B- tab contact point of the No. 1 soft-pack battery; the positive pole C+ tab contact point and the negative pole D- tab contact point of the No. 2 soft-pack battery; the positive pole E+ tab contact point and the negative pole F- tab contact point of the No. 3 soft-pack battery; the first output contact point on the upper end face is G+, and the second output contact point is H-. The series connection of three soft-pack battery cells is realized through the connection mode of G+, A+, B-, C+, D-, E+, F-, and H-.

[0047] In one embodiment, see Figure 5 The pole ear contact points on the lower end surface are arranged to be two in the horizontal direction, and any two pole ear contact points in the horizontal direction are connected via a diode.

[0048] Here, the PTC can be set between the first output contact G+ and the positive pole A+ ear contact point of the first soft-pack battery cell. The diode can be 1N4148, and the PTC thermistor can be TK110. PTC can play an overcurrent and overload protection in the circuit: when the current exceeds the rated value, the PTC will disconnect the circuit in time to prevent damage to the battery circuit. In the series circuit of lithium batteries, if the individual battery voltages are uneven or one battery is over-discharged due to heavy workload, it is possible that one battery voltage will be lower than the other battery. At this time, the current will flow from the high-voltage battery to the low-voltage battery. This current loop will cause the battery to be reversely charged, which may seriously damage the battery or damage the electronic equipment. The use of diodes can effectively prevent reverse charging and over-discharge of batteries, thereby playing a protective role.

[0049] In one embodiment, a parallel connection mode may also be provided accordingly. Here, the series connection of multiple batteries may refer to the above embodiment.

[0050] In one embodiment, the tab contact points on the lower end surface are arranged to be two in the horizontal direction and N in the vertical direction; wherein the two tab contact points in the horizontal direction correspond one to one to the positions of the two tabs of the soft-pack battery.

[0051] Here, see again Figure 3 There are 6 pole ear contact points, 2 horizontally and 3 vertically, for 3 soft-pack battery cells. The first pole ear and the second pole ear of each soft-pack battery cell correspond to the two horizontal pole ear contact points respectively.

[0052] Second, see again Figures 1 to 5 , an embodiment of the present invention provides a device for realizing rapid assembly of soft-pack batteries, which is used for connecting a plurality of soft-pack battery cells in series or in parallel, wherein each soft-pack battery has two pole ears on the same side, namely, a first pole ear and a second pole ear, and comprises: a battery shell, a cover group, a combined connecting plate and an elastic rubber strip; an opening is provided at one end of the battery shell, and the opening is overlapped and connected with the cover group; a cavity is provided in the battery shell, which is used to accommodate N soft-pack battery cells arranged side by side, wherein the pole ears face the direction of the opening, wherein N≥2; the first pole ear and the second pole ear of each soft-pack battery cell are bent and placed on the elastic rubber strip; the combined connecting plate comprises an upper end face and a lower end face, wherein the upper end face is provided with a first output terminal contact and a second output terminal contact, and the lower end face comprises 2N protruding pole ear contact points, wherein N≥2; the cover group comprises a positive output terminal and a negative output terminal; the elastic rubber strip, the pole ears, the combined connecting plate and the cover group are kept tightly connected by interference fit.

[0053] In one embodiment, the tabs corresponding to each soft-pack battery cell are tightly connected to the tab contact points.

[0054] Here, the tight connection can be abutment, and of course traditional welding and bonding can also be used, but compared with the abutment of the contact point of the tab and the matching size of the tab, abutment is more convenient and quicker.

[0055] In one embodiment, the battery shell and the cover assembly are bent, riveted or welded.

[0056] In one embodiment, the first output terminal contact is connected to the positive output terminal, and the second output contact is connected to the negative output terminal.

[0057] See also Figure 7 The embodiment of the present invention provides a method for realizing rapid assembly of a soft-pack battery, the method comprising:

[0058] Place N soft-pack battery cells in a battery case in a side-by-side arrangement, with the tabs facing the open end of the battery case, wherein N ≥ 2;

[0059] An elastic rubber strip is placed at one end of the pole ear of each soft-pack battery cell, and the first pole ear and the second pole ear are bent in the same direction and placed on the elastic rubber strip;

[0060] A combined connecting plate is installed, wherein the tab contact points of the combined connecting plate correspond to the tabs of each soft-pack battery cell respectively; wherein the combined connecting plate comprises an upper end surface and a lower end surface, the upper end surface is provided with a first output terminal contact point and a second output terminal contact point, and the lower end surface comprises 2N raised tab contact points, N≥2;

[0061] The cover group is installed, wherein the cover group includes a positive output terminal and a negative output terminal, the first output terminal contact is connected to the positive output terminal, and the second output contact is connected to the negative output terminal.

[0062] The battery shell opening is welded and fixed to the cover assembly.

[0063] An embodiment of the present invention provides a soft-pack battery pack, comprising:

[0064] N soft-pack battery cells arranged in a side-by-side arrangement and a device for realizing rapid assembly of soft-pack batteries as described in any one of the present inventions.

[0065] In summary, compared with the prior art, the embodiments of the present invention provide a combined connection plate, a device and method for realizing rapid assembly of soft-pack batteries, and a battery pack, which can save a lot of manpower, improve production efficiency, and realize automated production. Specifically,

[0066] 1. The combined connection board integrates multiple functions, and the overall electronic components occupy very little space; the input and output terminals and electronic components of the combined connection board are firmly and reliably integrated, eliminating poor connection; the use of the combined integrated connection board replaces the original cumbersome ear bending, welding, and insulating glue sticking processes. The standard outer dimensions of the connection board can realize rapid and automated assembly and production, greatly saving labor;

[0067] 2. The combined connection board circuit integrates PTC thermistors and multiple diodes. PTC can provide overcurrent and overload protection. When the current exceeds the rated value, PTC will disconnect the circuit in time to prevent damage to the battery circuit. The diode effectively prevents the battery from reverse charging and over-discharging, thereby protecting the battery circuit.

[0068] 3. The elastic strip has strong elasticity, is not easy to produce plastic deformation, and is not easy to be damaged, which ensures that there will be no failure such as poor contact after packaging;

[0069] 4. No welding is required, so there is no risk of battery failure due to heat transfer from welding into the battery.

[0070] 5. There is no need to reserve longer tabs for welding. Tabs can be cut to shorter sizes. There is no risk of tabs contacting each other inside the battery, thus completely eliminating the risk of internal short circuit and greatly improving battery safety.

[0071] 6. Each soft-pack battery cell is placed in the same direction, reducing the probability of manual orientation during the production process;

[0072] 7. Simplify the production process and greatly improve production efficiency.

[0073] The above description is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention. Any modification, equivalent replacement and improvement made within the spirit and scope of the present invention are included in the protection scope of the present invention.

Claims

1. A soft pack battery assembly connecting plate, characterized in that: include: upper end face and lower end face; The upper end surface includes a first output terminal contact and a second output terminal contact; The lower end surface includes 2N tab contact points, N≥2; The plurality of tab contacts are respectively connected in series or in parallel to the first output end contact and the second output end contact.

2. The soft pack battery assembly connection plate according to claim 1, characterized in that: The tab contact points of the lower end surface are arranged to be two in the horizontal direction and N in the vertical direction; wherein the two tab contact points in the horizontal direction correspond to the positions of the two tabs of the soft-pack battery one by one.

3. The soft pack battery assembly connection plate according to claim 1, characterized in that: The tab contact point is adapted to the tab size.

4. The soft pack battery assembly connecting plate according to claim 2, characterized in that: The tab contact points on the lower end surface are arranged in two lateral directions, and any two lateral tab contact points are connected via a diode.

5. A device for realizing rapid assembly of soft-pack batteries, used for connecting multiple soft-pack battery cells in series or in parallel, each soft-pack battery having two tabs on the same side, namely a first tab and a second tab, characterized in that: include: A battery shell, a cover assembly, a combined connecting plate and an elastic rubber strip; one end of the battery shell is provided with an opening, and the opening is overlapped and connected with the cover assembly; The battery shell is provided with a cavity for accommodating N soft-pack battery cells arranged side by side, wherein the pole ears are facing the opening direction, wherein N≥2; the first pole ear and the second pole ear of each soft-pack battery cell are bent and placed on the elastic rubber strip; the combined connecting plate includes an upper end face and a lower end face, the upper end face is provided with a first output terminal contact and a second output terminal contact, and the lower end face includes 2N raised pole ear contact points, wherein N≥2; the cover group includes a positive output terminal and a negative output terminal; the elastic rubber strip, the pole ears, the combined connecting plate, and the cover group are kept tightly connected by interference fit.

6. The device for realizing rapid assembly of soft-pack batteries according to claim 5, characterized in that: The tabs corresponding to each soft-pack battery cell are tightly connected to the tab contact points.

7. The device for realizing rapid assembly of soft-pack batteries according to claim 5, characterized in that: The battery shell and the cover assembly are bent, riveted or welded.

8. The device for realizing rapid assembly of soft-pack batteries according to claim 5, characterized in that: The first output terminal contact is connected to the positive output terminal, and the second output contact is connected to the negative output terminal.

9. A method for realizing rapid assembly of soft-pack batteries, characterized in that: The method comprises: Place N soft-pack battery cells in a battery case in a side-by-side arrangement, with the tabs facing the open end of the battery case, wherein N ≥ 2; An elastic rubber strip is placed at one end of the pole ear of each soft-pack battery cell, and the first pole ear and the second pole ear are bent in the same direction and placed on the elastic rubber strip; A combined connecting plate is installed, wherein the tab contact points of the combined connecting plate correspond to the tabs of each soft-pack battery cell respectively; wherein the combined connecting plate comprises an upper end surface and a lower end surface, the upper end surface is provided with a first output terminal contact point and a second output terminal contact point, and the lower end surface comprises 2N raised tab contact points, N≥2; The cover group is installed, wherein the cover group includes a positive output terminal and a negative output terminal, the first output terminal contact is connected to the positive output terminal, and the second output contact is connected to the negative output terminal. The battery shell opening is welded and fixed to the cover assembly.

10. A soft pack battery pack, characterized in that: include: N soft-pack battery cells arranged in a side-by-side arrangement and a device for realizing rapid assembly of soft-pack batteries as claimed in any one of claims 5 to 8.

Images